JavaScript/jQuery Gantt Methods

The resource key.

taskKey:

The task key.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.assignResourceToTask("resource_key","task_key");

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.assignResourceToTask("resource_key","task_key"); 
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.assignResourceToTask("resource_key","task_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.assignResourceToTask("resource_key","task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.assignResourceToTask("resource_key","task_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.assignResourceToTask("resource_key","task_key");
        // ...
    }
</script>

beginUpdate()

Prevents the UI component from refreshing until the endUpdate() method is called.

The beginUpdate() and endUpdate() methods prevent the UI component from excessive updates when you are changing multiple UI component settings at once. After the beginUpdate() method is called, the UI component does not update its UI until the endUpdate() method is called.

collapseAll()

Collapses all tasks.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.collapseAll();

Angular

app.component.ts

app.component.html

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.collapseAll(); 
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.collapseAll();
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.collapseAll();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.collapseAll();
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.collapseAll();
        // ...
    }
</script>

collapseTask(key)

Collapses a task.

Parameters:

key:

The task key.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.collapseTask("task_key");

Angular

app.component.ts

app.component.html

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";  

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.collapseTask("task_key"); 
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.collapseTask("task_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.collapseTask("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.collapseTask("task_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.collapseTask("task_key");
        // ...
    }
</script>

defaultOptions(rule)

Specifies the device-dependent default configuration properties for this component.

Parameters:

rule:

The component's default device properties.

Object structure:

Name	Type	Description
device	Device \| Array<Device> \| Function	Device parameters. When you specify a function, get information about the current device from the argument. Return true if the properties should be applied to the device.
options	Object	Options to be applied.

Name

Type

Description

device

Device

|

Array<Device>

|

Device parameters.
When you specify a function, get information about the current device from the argument. Return true if the properties should be applied to the device.

options

Options to be applied.

defaultOptions is a static method that the UI component class supports. The following code demonstrates how to specify default properties for all instances of the Gantt UI component in an application executed on the desktop.

jQuery

JavaScript

DevExpress.ui.dxGantt.defaultOptions({ 
    device: { deviceType: "desktop" },
    options: {
        // Here go the Gantt properties
    }
});

Angular

TypeScript

import Gantt, { Properties } from "devextreme/ui/gantt";
// ...
export class AppComponent {
    constructor () {
        Gantt.defaultOptions<Properties>({
            device: { deviceType: "desktop" },
            options: {
                // Here go the Gantt properties
            }
        });
    }
}

Vue

<template>
    <div>
        <DxGantt id="gantt1" />
        <DxGantt id="gantt2" />
    </div>
</template>
<script>
import DxGantt from "devextreme-vue/gantt";
import Gantt from "devextreme/ui/gantt";

Gantt.defaultOptions({
    device: { deviceType: "desktop" },
    options: {
        // Here go the Gantt properties
    }
});

export default {
    components: {
        DxGantt
    }
}
</script>

React

import dxGantt from "devextreme/ui/gantt";
import Gantt from "devextreme-react/gantt";

dxGantt.defaultOptions({
    device: { deviceType: "desktop" },
    options: {
        // Here go the Gantt properties
    }
});

export default function App() {
    return (
        <div>
            <Gantt id="gantt1" />
            <Gantt id="gantt2" />
        </div>
    )
}

deleteDependency(key)

Deletes a dependency.

Parameters:

key:

The dependency key.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.deleteDependency("dependency_key");

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.deleteDependency("dependency_key"); 
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.deleteDependency("dependency_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.deleteDependency("dependency_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.deleteDependency("dependency_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.deleteDependency("dependency_key");
        // ...
    }
</script>

deleteResource(key)

Deletes a resource.

Parameters:

key:

The resource key.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.deleteResource("resource_key");

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.deleteResource("resource_key");
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.deleteResource("resource_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.deleteResource("resource_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.deleteResource("resource_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.deleteResource("resource_key");
        // ...
    }
</script>

deleteTask(key)

Deletes a task.

Parameters:

key:

The task key.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.deleteTask("task_key");

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.deleteTask("task_key");
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.deleteTask("task_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.deleteTask("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.deleteTask("task_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.deleteTask("task_key");
        // ...
    }
</script>

dispose()

Disposes of all the resources allocated to the Gantt instance.

jQuery

After calling this method, remove the DOM element associated with the UI component:

JavaScript

$("#myGantt").dxGantt("dispose");
$("#myGantt").remove();

Angular

Use conditional rendering instead of this method:

app.component.html

<dx-gantt ...
    *ngIf="condition">
</dx-gantt>

Vue

Use conditional rendering instead of this method:

App.vue

<template>
    <DxGantt ...
        v-if="condition">
    </DxGantt>
</template>

<script>
import DxGantt from 'devextreme-vue/gantt';

export default {
    components: {
        DxGantt
    }
}
</script>

React

Use conditional rendering instead of this method:

App.js

import React from 'react';

import Gantt from 'devextreme-react/gantt';

function DxGantt(props) {
    if (!props.shouldRender) {
        return null;
    }

    return (
        <Gantt ... >    
        </Gantt>
    );
}

class App extends React.Component {
    render() {
        return (
            <DxGantt shouldRender="condition" />
        );
    }
}
export default App;

element()

Gets the root UI component element.

Return Value:

HTMLElement | jQuery

An HTML element or a jQuery element when you use jQuery.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

endUpdate()

Refreshes the UI component after a call of the beginUpdate() method.

Main article: beginUpdate()

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

expandAll()

Expands all tasks.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.expandAll();

Angular

app.component.ts

app.component.html

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";  

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.expandAll(); 
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.expandAll();
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.expandAll();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandAll();
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandAll();
        // ...
    }
</script>

expandAllToLevel(level)

Expands all tasks down to the specified hierarchical level.

Parameters:

level:

Number

The hierarchical level.

The expandAllToLevel method first collapses all expanded tasks and then expands them to the specified hierarchical level.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.expandAllToLevel(3);

Angular

app.component.ts

app.component.html

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular"; 

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.expandAllToLevel(3); 
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.expandAllToLevel(3);
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.expandAllToLevel(3);
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandAllToLevel(3);
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandAllToLevel(3);
        // ...
    }
</script>

expandTask(key)

Expands a task.

Parameters:

key:

The task key.

The expandTask method expands a task's parent tasks and the task itself.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.expandTask("task_key");

Angular

app.component.ts

app.component.html

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.expandTask("task_key"); 
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.expandTask("task_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.expandTask("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandTask("task_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandTask("task_key");
        // ...
    }
</script>

expandToTask(key)

Expands a task's parent tasks.

Parameters:

key:

The task key.

The expandToTask method expands a task's parent tasks and does not expand the task itself.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.expandToTask("task_key");

Angular

app.component.ts

app.component.html

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.expandToTask("task_key"); 
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.expandToTask("task_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.expandToTask("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandToTask("task_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandToTask("task_key");
        // ...
    }
</script>

focus()

Sets focus on the UI component.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

getDependencyData(key)

Gets the dependency data.

Parameters:

key:

The dependency key.

Return Value:

The dependency data.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.getDependencyData("dependency_key");

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getDependencyData("dependency_key");
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getDependencyData("dependency_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getDependencyData("dependency_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getDependencyData("dependency_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getDependencyData("dependency_key");
        // ...
    }
</script>

getInstance(element)

Gets the instance of a UI component found using its DOM node.

Parameters:

element:

Element

|

jQuery

The UI component's container.

Return Value:

The UI component's instance.

getInstance is a static method that the UI component class supports. The following code demonstrates how to get the Gantt instance found in an element with the myGantt ID:

// Modular approach
import Gantt from "devextreme/ui/gantt";
...
let element = document.getElementById("myGantt");
let instance = Gantt.getInstance(element) as Gantt;

// Non-modular approach
let element = document.getElementById("myGantt");
let instance = DevExpress.ui.dxGantt.getInstance(element);

getResourceAssignmentData(key)

Gets the resource assignment data.

Parameters:

key:

The resource assignment key.

Return Value:

The resource assignment data.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.getResourceAssignmentData("res_assignment_key");

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getResourceAssignmentData("res_assignment_key");
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getResourceAssignmentData("res_assignment_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getResourceAssignmentData("res_assignment_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getResourceAssignmentData("res_assignment_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getResourceAssignmentData("res_assignment_key");
        // ...
    }
</script>

getResourceData(key)

Gets the resource data.

Parameters:

key:

The resource key.

Return Value:

The resource data.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.getResourceData("resource_key");

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getResourceData("resource_key");
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getResourceData("resource_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getResourceData("resource_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getResourceData("resource_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getResourceData("resource_key");
        // ...
    }
</script>

getTaskData(key)

Gets the task data.

Parameters:

key:

The task key.

Return Value:

The task data.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.getTaskData("task_key");

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getTaskData("task_key");
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getTaskData("task_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getTaskData("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getTaskData("task_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getTaskData("task_key");
        // ...
    }
</script>

getTaskResources(key)

Gets resources assigned to a task.

Parameters:

key:

The task's key.

Return Value:

The resources.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
//...
gantt.getTaskResources("task_key");

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getTaskResources("task_key");
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getTaskResources("task_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getTaskResources("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getTaskResources("task_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getTaskResources("task_key");
        // ...
    }
</script>

getVisibleDependencyKeys()

Gets the keys of the visible dependencies.

Return Value:

The keys.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
//...
var keys = gantt.getVisibleDependencyKeys();

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getVisibleDependencyKeys();
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getVisibleDependencyKeys();
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getVisibleDependencyKeys();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleDependencyKeys();
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleDependencyKeys();
        // ...
    }
</script>

getVisibleResourceAssignmentKeys()

Gets the keys of the visible resource assignments.

Return Value:

The keys.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
//...
var keys = gantt.getVisibleResourceAssignmentKeys();

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getVisibleResourceAssignmentKeys();
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getVisibleResourceAssignmentKeys();
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getVisibleResourceAssignmentKeys();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleResourceAssignmentKeys();
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleResourceAssignmentKeys();
        // ...
    }
</script>

getVisibleResourceKeys()

Gets the keys of the visible resources.

Return Value:

The keys.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
//...
var keys = gantt.getVisibleResourceKeys();

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getVisibleResourceKeys();
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getVisibleResourceKeys();
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getVisibleResourceKeys();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleResourceKeys();
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleResourceKeys();
        // ...
    }
</script>

getVisibleTaskKeys()

Gets the keys of the visible tasks.

Return Value:

The keys.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
//...
var keys = gantt.getVisibleTaskKeys();

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getVisibleTaskKeys();
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getVisibleTaskKeys();
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getVisibleTaskKeys();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleTaskKeys();
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleTaskKeys();
        // ...
    }
</script>

insertDependency(data)

Inserts a new dependency.

Parameters:

data:

The dependency data.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.insertDependency({ predecessorId: 1, successorId: 3, type: 3 });

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.insertDependency({ predecessorId: 1, successorId: 3, type: 3 });
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.insertDependency({ predecessorId: 1, successorId: 3, type: 3 });
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.insertDependency({ predecessorId: 1, successorId: 3, type: 3 });
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.insertDependency({ predecessorId: 1, successorId: 3, type: 3 });
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.insertDependency({ predecessorId: 1, successorId: 3, type: 3 });
        // ...
    }
</script>

insertResource(data, taskKeys)

Inserts a new resource.

Parameters:

data:

The resource data.

taskKeys?:

An array of task keys.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
// Inserts a new resource 
gantt.insertResource({ text: "New Resource" });

// Inserts a new resource and assigns it to an individual task
gantt.insertResource({ text: "New Resource" }, [6]);

// Inserts a new resource and assigns it to multiple tasks
gantt.insertResource({ text: "New Resource" }, [6,8]);

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        // Inserts a new resource 
        this.gantt.instance.insertResource({ text: "New Resource" });

        // Inserts a new resource and assigns it to an individual task
        this.gantt.instance.insertResource({ text: "New Resource" }, [6]);

        // Inserts a new resource and assigns it to multiple tasks
        this.gantt.instance.insertResource({ text: "New Resource" }, [6,8]);
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            // Inserts a new resource 
            this.gantt.insertResource({ text: "New Resource" });

            // Inserts a new resource and assigns it to an individual task
            this.gantt.insertResource({ text: "New Resource" }, [6]);

            // Inserts a new resource and assigns it to multiple tasks
            this.gantt.insertResource({ text: "New Resource" }, [6,8]);
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            // Inserts a new resource 
            this.gantt.insertResource({ text: "New Resource" });

            // Inserts a new resource and assigns it to an individual task
            this.gantt.insertResource({ text: "New Resource" }, [6]);

            // Inserts a new resource and assigns it to multiple tasks
            this.gantt.insertResource({ text: "New Resource" }, [6,8]);
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        // Inserts a new resource 
        ganttInstance.insertResource({ text: "New Resource" });

        // Inserts a new resource and assigns it to an individual task
        ganttInstance.insertResource({ text: "New Resource" }, [6]);

        // Inserts a new resource and assigns it to multiple tasks
        ganttInstance.insertResource({ text: "New Resource" }, [6,8]);
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        // Inserts a new resource 
        ganttInstance.insertResource({ text: "New Resource" });

        // Inserts a new resource and assigns it to an individual task
        ganttInstance.insertResource({ text: "New Resource" }, [6]);

        // Inserts a new resource and assigns it to multiple tasks
        ganttInstance.insertResource({ text: "New Resource" }, [6,8]);
    }
</script>

insertTask(data)

Inserts a new task.

Parameters:

data:

The task data.

The insertTask method does not update the following data fields in the data source:

Key value fields.
Fields that are not assigned to the Gantt's columns.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
// Inserts a new task with the specified subject at the end of the other tasks.
gantt.insertTask({ title: "New Task" });

// Inserts a child task with the specified subject as a child of the task with ID = 2
gantt.insertTask({ title: "New Task" , parentId: 2});

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        // Inserts a new task with the specified subject at the end of the other tasks.
        this.gantt.instance.insertTask({ title: "New Task" });

        // Inserts a child task with the specified subject as a child of the task with ID = 2
        this.gantt.instance.insertTask({ title: "New Task" , parentId: 2});
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            // Inserts a new task with the specified subject at the end of the other tasks.
            this.gantt.insertTask({ title: "New Task" });

            // Inserts a child task with the specified subject as a child of the task with ID = 2
            this.gantt.insertTask({ title: "New Task" , parentId: 2});
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            // Inserts a new task with the specified subject at the end of the other tasks.
            this.gantt.insertTask({ title: "New Task" });

            // Inserts a child task with the specified subject as a child of the task with ID = 2
            this.gantt.insertTask({ title: "New Task" , parentId: 2});
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        // Inserts a new task with the specified subject at the end of the other tasks.
        ganttInstance.insertTask({ title: "New Task" });

        // Inserts a child task with the specified subject as a child of the task with ID = 2
        ganttInstance.insertTask({ title: "New Task" , parentId: 2});
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        // Inserts a new task with the specified subject at the end of the other tasks.
        ganttInstance.insertTask({ title: "New Task" });

        // Inserts a child task with the specified subject as a child of the task with ID = 2
        ganttInstance.insertTask({ title: "New Task" , parentId: 2});
    }
</script>

instance()

Gets the UI component's instance. Use it to access other methods of the UI component.

Return Value:

This UI component's instance.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

off(eventName)

Detaches all event handlers from a single event.

Parameters:

eventName:

The event's name.

Return Value:

The object for which this method is called.

jQuery

Handle Events

Angular

Event Handling

Vue

Event Handling

React

Event Handling

off(eventName, eventHandler)

Detaches a particular event handler from a single event.

Parameters:

eventName:

The event's name.

eventHandler:

The event's handler.

Return Value:

The object for which this method is called.

jQuery

Handle Events

Angular

Event Handling

Vue

Event Handling

React

Event Handling

on(eventName, eventHandler)

Subscribes to an event.

Parameters:

eventName:

The event's name.

eventHandler:

The event's handler.

Return Value:

The object for which this method is called.

Use this method to subscribe to one of the events listed in the Events section.

jQuery

Handle Events

Angular

Event Handling

Vue

Event Handling

React

Event Handling

on(events)

Subscribes to events.

Parameters:

events:

Events with their handlers: { "eventName1": handler1, "eventName2": handler2, ...}

Return Value:

The object for which this method is called.

Use this method to subscribe to several events with one method call. Available events are listed in the Events section.

jQuery

Handle Events

Angular

Event Handling

Vue

Event Handling

React

Event Handling

option()

Gets all UI component properties.

Return Value:

The UI component's properties.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

option(optionName)

Gets the value of a single property.

Parameters:

optionName:

The property's name or full path.

Return Value: any

This property's value.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

option(optionName, optionValue)

Updates the value of a single property.

Parameters:

optionName:

The property's name or full path.

optionValue: any

This property's new value.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

option(options)

Updates the values of several properties.

Parameters:

options:

Options with their new values.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

refresh()

Reloads data and repaints the Gantt component.

Return Value:

Promise<void> (jQuery or native)

A Promise that is resolved after data is loaded. It is a native Promise or a jQuery.Promise when you use jQuery.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
//...
gantt.refresh();

Angular

app.component.ts

app.component.html

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";  

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.refresh();
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.refresh();
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.refresh();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.refresh();
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.refresh();
        // ...
    }
</script>

registerKeyHandler(key, handler)

Registers a handler to be executed when a user presses a specific key.

Parameters:

key:

A key.

handler:

A handler. Accepts the keydown event as the argument. It is a EventObject or a jQuery.Event when you use jQuery.

The key argument accepts one of the following values:

"backspace"
"tab"
"enter"
"escape"
"pageUp"
"pageDown"
"end"
"home"
"leftArrow"
"upArrow"
"rightArrow"
"downArrow"
"del"
"space"
"F"
"A"
"asterisk"
"minus"

A custom handler for a key cancels the default handler for this key.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

repaint()

Repaints the UI component without reloading data. Call it to update the UI component's markup.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

resetOption(optionName)

Resets a property to its default value.

Parameters:

optionName:

A property's name.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

scrollToDate(date)

Scrolls the Gantt chart to the specified date.

Parameters:

date:

Date

|

Number

|

The date.

You can pass the date to the scrollToDate method in the following formats:

Date

JavaScript

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.scrollToDate(new Date("December 17, 2020"));

Number - Specifies a date as a timestamp (total milliseconds since 1970/01/01).
JavaScript
```
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.scrollToDate(1876800000000);
```

String - Specifies a date as a string value.

JavaScript

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.scrollToDate("2020/01/01");

Note that the scrollToDate method scrolls to a date inside the current scroll area. You can zoom the chart to resize the viewport.

NOTE

Specify a timeout if you call the scrollToDate method in the contentReady event.

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.scrollToDate(new Date("December 17, 2020"));

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.scrollToDate(new Date("December 17, 2020")); 
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.scrollToDate(new Date("December 17, 2020"));
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.scrollToDate(new Date("December 17, 2020"));
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.scrollToDate(new Date("December 17, 2020"));
        // ...
    }
</script>

showDependencies(value)

Shows or hides dependencies between tasks.

Parameters:

value:

Boolean

Specifies whether to show or hide dependencies.

DevExtreme Gantt Chart - Dependencies

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.showDependencies(false);

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.showDependencies(false); 
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.showDependencies(false);
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.showDependencies(false);
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.showDependencies(false);
        ganttInstance.showDependencies(false);
        // ...
    }
</script>

showResourceManagerDialog()

Invokes the "Resource Manager" dialog.

DevExtreme Gantt - Invoke Resource Manager

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.showResourceManagerDialog();

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from 'devextreme-angular';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})

export class AppComponent implements OnAfterViewInit {

    @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    showDialog() {
        this.gantt.instance.showResourceManagerDialog();
    }

    ngAfterViewInit () {
        this.showDialog();
    }
}

<dx-gantt ...>
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...>
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';

import DxGantt from 'devextreme-vue/gantt';

export default {
    components: {
        DxGantt
    },
    methods: {
        showDialog() {
            this.gantt.showResourceManagerDialog();
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';
import Gantt from 'devextreme-react/gantt';

const App = () => {
    const showDialog = () => {
        myGantt.current.instance.showResourceManagerDialog();
    }

    return (
        <Gantt ref={myGantt} />
    );
}

export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    // ...
)
<script>
    function showDialog() {
        gantt.showResourceManagerDialog();
    }
</script>

showResources(value)

Shows or hides task resources.

Parameters:

value:

Boolean

Specifies whether to show or hide task resources.

DevExtreme Gantt Chart - Resources

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.showResources(false);

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.showResources(false); 
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.showResources(false);
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.showResources(false);
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.showResources(false);
        // ...
    }
</script>

showTaskDetailsDialog(taskKey)

Invokes the "Task Details" dialog.

Parameters:

taskKey:

A task key.

DevExtreme Gantt Chart - Task Edit Dialog

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.showTaskDetailsDialog("task_key");

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.showTaskDetailsDialog("task_key"); 
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.showTaskDetailsDialog("task_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.showTaskDetailsDialog("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.showTaskDetailsDialog("task_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.showTaskDetailsDialog("task_key");
        // ...
    }
</script>

unassignAllResourcesFromTask(taskKey)

Removes all resources from the task.

Parameters:

taskKey:

The task key.

DevExtreme Gantt Chart - Resources

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.unassignAllResourcesFromTask("task_key");

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.unassignAllResourcesFromTask("task_key");
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.unassignAllResourcesFromTask("task_key");
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.unassignAllResourcesFromTask("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.unassignAllResourcesFromTask("task_key");
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.unassignAllResourcesFromTask("task_key");
        // ...
    }
</script>

unassignResourceFromTask(resourceKey, taskKey)

Removes a resource from the task.

Parameters:

resourceKey:

The resource key.

taskKey:

The task key.

DevExtreme Gantt Chart - Resources

jQuery

index.js

var gantt = $("#ganttContainer").dxGantt("instance");
gantt.unassignResourceFromTask(3, 10);

Angular

app.component.ts

app.component.html

app.module.ts

import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.unassignResourceFromTask(3, 10);
        // ...
    }
}

<dx-gantt ... >
</dx-gantt>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.unassignResourceFromTask(3, 10);
            // ...
        }
    }
}
</script>

React

App.js

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.unassignResourceFromTask(3, 10);
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.unassignResourceFromTask(3, 10);
        // ...
    }
</script>

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.unassignResourceFromTask(3, 10);
        // ...
    }
</script>

updateDimensions()

Updates the dimensions of the UI component contents.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

updateTask(key, data)

Updates the task data.

Parameters:

key:

The task key.

data: