DevExtreme React - Update Data

This technique is universal for any data source as anything passed to the dataSource option of the Chart ends up wrapped in the DevExtreme DataSource. To get the DataSource instance, call the getDataSource() method of the Chart.

var ds = $("#chartContainer").dxChart("getDataSource");

angular.module('DemoApp', ['dx'])
    .controller('DemoController', function ($scope) {
        $scope.ds = {};
        $scope.chartOptions = {
            // ...
            onInitialized: function (e) {
                $scope.ds = e.component.getDataSource();  
            }
        };
    });

var viewModel = {
    ds: {},
    chartOptions: {
        // ...
        onInitialized: function (e) {
            viewModel.ds = e.component.getDataSource();    
        }
    }
};

ko.applyBindings(viewModel);

import { ..., ViewChild } from '@angular/core';
import { DxChartModule, DxChartComponent } from 'devextreme-angular';
// ...
export class AppComponent {
    @ViewChild(DxChartComponent) chart: DxChartComponent;
    ds: any = {};
    getDataSource() {
        this.ds = this.chart.instance.getDataSource();
    }
}
@NgModule({
    imports: [
        // ...
        DxChartModule
    ],
    // ...
})

After that, you need to access the underlying Store with the store() method, and call the insert(values), update(key, values) or remove(key) method of the Store to modify data. Note that in order to use the update(key, values) and remove(key) methods, you need to specify the key property for the Store. After all modifications are made, call the load method in the DataSource instance to make the Chart reflect the changes.

ds.store().update("Oranges", { count: 10 });
ds.store().remove("Apples");
ds.load();

See Also

• Call Methods: jQuery | Angular | AngularJS | Knockout | ASP.NET MVC
• DevExtreme Data Layer - Overview
• DevExtreme Data Layer - DataSource Examples

Make changes to the array using standard methods. Then, reassign the updated array to the Chart using the option(optionName, optionValue) method.

var fruits = [
    { fruit: 'Apples', count: 10 },
    { fruit: 'Oranges', count: 12 },
    { fruit: 'Lemons', count: 15 }
];

fruits.push({ fruit: 'Pineapples', count: 3 });
// Reassigns the "fruits" array to the "Chart" 
$("#chartContainer").dxChart("option", "dataSource", fruits);

See Also

• Get and Set Options - jQuery

Enclose the dataSource option in square brackets to bind it to an array using one-way binding. Now, whenever an item is added or removed from the array, the Chart will be updated accordingly.

<dx-chart [dataSource]="fruits"></dx-chart>

import { DxChartModule } from 'devextreme-angular';
// ...
export class AppComponent {
    fruits = [
        { fruit: 'Apples', count: 10 },
        { fruit: 'Oranges', count: 12 },
        { fruit: 'Lemons', count: 15 }
    ];
}
@NgModule({
    imports: [
        // ...
        DxChartModule
    ],
    // ...
})

See Also

• DevExtreme Angular on GitHub

Declare two-way data binding between the dataSource option and the scope property that contains an array. For this, configure the bindingOptions object of the Chart as follows.

<div ng-controller="DemoController">
    <div dx-chart="{
        ...
        bindingOptions: {
            dataSource: 'fruits'
        }
    }"></div>
</div>

angular.module('DemoApp', ['dx'])
    .controller('DemoController', function ($scope) {
        $scope.fruits = [
            { fruit: 'Apples', count: 10 },
            { fruit: 'Oranges', count: 12 },
            { fruit: 'Lemons', count: 15 }
        ];
    });

Now, whenever an item is added or removed from the fruits array, the Chart will be updated accordingly. If you need to track changes in objects, configure the bindingOptions object as follows.

<div ng-controller="DemoController">
    <div dx-chart="{
        ...
        bindingOptions: {
            dataSource: {
                dataPath: 'fruits',
                deep: true
            }
        }
    }"></div>
</div>

In this case, the Chart will use the $watch listener instead of the default $watchCollection listener. Note that the use of the $watch listener may impact the Chart's peformance.

See Also

• Change Options - AngularJS

Declare the array observable and bind the dataSource option to it. Whenever an item is added or removed from this array, the Chart will be updated accordingly.

<div id="chartContainer" data-bind="dxChart: {
    dataSource: fruits,
    ...
}"></div>

var viewModel = {
    fruits: ko.observableArray([
        { fruit: 'Apples', count: 10 },
        { fruit: 'Oranges', count: 12 },
        { fruit: 'Lemons', count: 15 }
    ])
};

ko.applyBindings(viewModel);

See Also

• Change Options - Knockout