DevExtreme React - Get a Widget Instance

You can use the @ViewChild or @ViewChildren decorator (depending on whether you are getting a single or multiple widget instances) and the component's instance property to access a widget instance. These decorators accept a component name or a template reference variable:

TypeScript
import { Component, ViewChild } from "@angular/core";
import { DxDataGridComponent } from "devextreme-angular";

@Component({
    selector: 'my-app',
    template: `
        <dx-data-grid #targetDataGrid [dataSource]="dataSource"></dx-data-grid>
        <dx-button text="Refresh data" (onClick)="refresh()"></dx-button>
    `
})
export class AppComponent {
    @ViewChild(DxDataGridComponent) dataGrid: DxDataGridComponent
    // or using a template reference variable
    // @ViewChild("targetDataGrid") dataGrid: DxDataGridComponent
    refresh() {
        this.dataGrid.instance.refresh();
    }

    // Getting multiple instances of one widget
    // @ViewChildren(DxDataGridComponent) dataGrids: QueryList<DxDataGridComponent>
}

To access a widget instance in the markup, use the same template reference variables:

HTML
<dx-select-box #targetSelectBox [items]="items"></dx-select-box>
{{targetSelectBox.value}}

If none of the above can be used, save the widget instance in a component property once the widget is initialized:

TypeScript
import { Component } from "@angular/core";
import DataGrid from "devextreme/ui/data_grid";

@Component({
    selector: 'my-app',
    template: `
        <dx-data-grid
            [dataSource]="dataSource"
            (onInitialized)="saveGridInstance($event)">
        </dx-data-grid>
        <dx-button text="Refresh data" (onClick)="refresh()"></dx-button>
    `
})
export class AppComponent {
    dataGridInstance: DataGrid;
    saveGridInstance (e) {
        this.dataGridInstance = e.component;
    }
    refresh() {
        this.dataGridInstance.refresh();
    }
}
See Also