Programmatically select grid rows based on condition in Angular Grid

Rows can be programmatically selected in the Syncfusion Angular Grid component using the selectRows method within the dataBound event. This approach allows selection logic to execute after the grid has fully rendered its data.
In the example below, all grid rows are selected where the value of the EmployeeID column is greater than 3. The selection logic is placed inside the dataBound event handler to ensure the Grid is ready for programmatic selection.

app.component.ts

import { columnDataType, data } from './datasource';
import { Component, OnInit, ViewChild } from '@angular/core';
import { FilterService, GridComponent, GridModule, GroupService, PageService, RowDataBoundEventArgs, SelectionSettingsModel, SortService } from '@syncfusion/ej2-angular-grids';

@Component({
    imports: [ GridModule ],
    providers: [PageService, SortService, FilterService, GroupService],
    standalone: true,
    selector: 'app-root',
    template: `<div id="GridParent">
                    <ejs-grid #Grid [dataSource]="data" allowPaging='true' [selectionSettings]='selectionOptions'
                    (rowDataBound)='rowDataBound($event)' (dataBound)='dataBound()' height='273px'>
                        <e-columns>
                            <e-column field='OrderID' headerText='Order ID' textAlign='Right' isPrimaryKey='true' width=100></e-column>
                            <e-column field='CustomerID' headerText='Customer ID' width=120></e-column>
                            <e-column field='EmployeeID' headerText='Employee ID' textAlign= 'Right' width=120></e-column>
                            <e-column field='ShipCity' headerText='Ship City'  width=120></e-column>
                            <e-column field='ShipName' headerText='Ship Name' width=150></e-column>
                        </e-columns>
                    </ejs-grid>
               </div>`
})
export class AppComponent implements OnInit {
    public data?: object[];
    @ViewChild('Grid') 
    public grid?: GridComponent;
    public selectionOptions?: SelectionSettingsModel;
    public selIndex?: number[] = [];

    ngOnInit(): void {
        this.data = data;
        this.selectionOptions = { type: 'Multiple' };
    }

    public rowDataBound(args: RowDataBoundEventArgs ): void {
            if (((args.data as columnDataType)['EmployeeID'] as number) > 3) {
            this.selIndex?.push(parseInt(((args.row as Element).getAttribute('aria-rowindex') as string), 10));
        }
    }

    public dataBound(): void {
        if (this.selIndex?.length) {
            this.grid?.selectRows(this.selIndex);
            this.selIndex = [];
        }
    }
}

main.ts

import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));