JavaScript/jQuery FileManager Methods

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 FileManager UI component in an application executed on the desktop.

jQuery

JavaScript

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

Angular

TypeScript

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

Vue

<template>
    <div>
        <DxFileManager id="fileManager1" />
        <DxFileManager id="fileManager2" />
    </div>
</template>
<script>
import DxFileManager from "devextreme-vue/file-manager";
import FileManager from "devextreme/ui/file_manager";

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

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

React

import dxFileManager from "devextreme/ui/file_manager";
import FileManager from "devextreme-react/file-manager";

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

export default function App() {
    return (
        <div>
            <FileManager id="fileManager1" />
            <FileManager id="fileManager2" />
        </div>
    )
}

You can also set rules for multiple device types:

jQuery

JavaScript

const devicesConfig = [
    { deviceType: 'desktop' },
    { deviceType: 'tablet' },
    { deviceType: 'phone' },
];

devicesConfig.forEach(deviceConfig => {
    DevExpress.ui.dxFileManager.defaultOptions({ 
        device: deviceConfig,
        options: {
            // Here go the FileManager properties
        }
    });
});

Angular

TypeScript

import FileManager, { Properties } from "devextreme/ui/file_manager";
// ...
export class AppComponent {
    constructor () {
        const devicesConfig = [
            { deviceType: 'desktop' },
            { deviceType: 'tablet' },
            { deviceType: 'phone' },
        ];

        devicesConfig.forEach(deviceConfig => {
            FileManager.defaultOptions<Properties>({
                device: deviceConfig,
                options: {
                    // Here go the FileManager properties
                }
            });
        });
    }
}

Vue

<template>
    <div>
        <DxFileManager />
    </div>
</template>
<script>
import DxFileManager from "devextreme-vue/file-manager";
import FileManager from "devextreme/ui/file_manager";

const devicesConfig = [
    { deviceType: 'desktop' },
    { deviceType: 'tablet' },
    { deviceType: 'phone' },
];

devicesConfig.forEach(deviceConfig => {
    FileManager.defaultOptions({
        device: deviceConfig,
        options: {
            // Here go the FileManager properties
        }
    });
});

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

React

import dxFileManager from "devextreme/ui/file_manager";
import FileManager from "devextreme-react/file-manager";

const devicesConfig = [
    { deviceType: 'desktop' },
    { deviceType: 'tablet' },
    { deviceType: 'phone' },
];

devicesConfig.forEach(deviceConfig => {
    dxFileManager.defaultOptions({
        device: deviceConfig,
        options: {
            // Here go the FileManager properties
        }
    });
});

export default function App() {
    return (
        <div>
            <FileManager />
        </div>
    )
}

dispose()

Disposes of all the resources allocated to the FileManager instance.

jQuery

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

JavaScript

$("#myFileManager").dxFileManager("dispose");
$("#myFileManager").remove();

Angular

Use conditional rendering instead of this method:

app.component.html

<dx-file-manager ...
    *ngIf="condition">
</dx-file-manager>

Vue

Use conditional rendering instead of this method:

App.vue

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

<script>
import DxFileManager from 'devextreme-vue/file-manager';

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

React

Use conditional rendering instead of this method:

App.js

import React from 'react';

import FileManager from 'devextreme-react/file-manager';

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

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

class App extends React.Component {
    render() {
        return (
            <DxFileManager 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.

The beginUpdate() and endUpdate() methods reduce the number of renders in cases where extra rendering can negatively affect performance.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

focus()

Sets focus on the UI component.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

getCurrentDirectory()

Gets the current directory object.

Return Value:

An object that contains information about the FileManager item.

This method returns the following FileManager item's parameters:

pathInfo: Array<Object> - Information about the item's path.
parentPath: string - The item's parent path.
key: string - The item's key.
relativeName: string - The item's relative name.
isDirectory: boolean - The item's type (file or directory).
isRoot: boolean - The directory type (standard or root).
size: number - The item size.
dateModified: Date - The item's modified date.
thumbnail: string - The item's thumbnail URL.
tooltipText: string - The item's tooltip text.

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 FileManager instance found in an element with the myFileManager ID:

// Modular approach
import FileManager from "devextreme/ui/file_manager";
...
let element = document.getElementById("myFileManager");
let instance = FileManager.getInstance(element) as FileManager;

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

getSelectedItems()

Gets the selected items.

Return Value:

Array<Object>

The selected items.

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 UI component.

Return Value:

Promise<any> (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.

View Demo

The following example illustrates how to use this method:

jQuery

index.js

var fileManager = $("#fileManagerContainer").dxFileManager("instance");
//...
fileManager.refresh();

Angular

app.component.ts

app.component.html

app.module.ts

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

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

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

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

<dx-file-manager 
    id="fileManager">
    <!-- ... -->
</dx-file-manager>

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

import { DxFileManagerModule } from 'devextreme-angular';

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

Vue

App.vue

<template>
    <DxFileManager
        :ref="fileManagerRef">
    </DxFileManager>
</template>

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

    import {
        DxFileManager
    } from 'devextreme-vue/file-manager';

    const fileManagerRef = 'fileManager';

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

React

App.js

import React from 'react';

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

import FileManager from 'devextreme-react/file-manager';

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

        this.fileManagerRef = React.createRef();

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

    get fileManager() {
        return this.fileManagerRef.current.instance();
    }

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

ASP.NET MVC Controls

Razor C#

@(Html.DevExtreme().FileManager()
    .ID("fileManager")
    // ...
)
<script type="text/javascript">
    function getFileManagerInstance() {
        return $("#fileManager").dxFileManager("instance");
    }
    function yourCustomMethod() {
        var fileManagerInstance = getFileManagerInstance();
        fileManagerInstance.refresh();
        // ...
    }
</script>

ASP.NET Core Controls

Razor C#

@(Html.DevExtreme().FileManager()
    .ID("fileManager")
    // ...
)
<script type="text/javascript">
    function getFileManagerInstance() {
        return $("#fileManager").dxFileManager("instance");
    }
    function yourCustomMethod() {
        var fileManagerInstance = getFileManagerInstance();
        fileManagerInstance.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()

Renders the component again without reloading data. Use the method to update the component's markup and appearance dynamically.

The repaint() method re-initializes the component with new settings, resetting its state and history.

View on GitHub

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

resetOption(optionName)

Resets a property to its default value.

Parameters:

optionName: