Angular Data Grid - Data Validation

import { bootstrapApplication } from '@angular/platform-browser'; import { Component, enableProdMode, provideZoneChangeDetection } from '@angular/core'; import { HttpClient, provideHttpClient, withFetch } from '@angular/common/http'; import { DxDataGridModule } from 'devextreme-angular'; import * as AspNetData from 'devextreme-aspnet-data-nojquery'; import { CustomStore } from 'devextreme-angular/common/data'; import { lastValueFrom } from 'rxjs'; import 'anti-forgery'; if (!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ styleUrls: [`app/app.component.css`], selector: 'demo-app', templateUrl: './app.component.html', imports: [ DxDataGridModule, ], }) export class AppComponent { dataSource: CustomStore; pattern = /^\(\d{3}\) \d{3}-\d{4}$/i; baseUrl = 'https://js.devexpress.com/Demos/NetCore'; constructor(private httpClient: HttpClient) { const url = `${this.baseUrl}/api/DataGridEmployeesValidation`; this.dataSource = AspNetData.createStore({ key: 'ID', loadUrl: url, insertUrl: url, updateUrl: url, deleteUrl: url, onBeforeSend(method, ajaxOptions) { ajaxOptions.xhrFields = { withCredentials: true }; }, }); } asyncValidation = async (params: Record<string, unknown> & { data: Record<string, unknown> }) => { const emailValidationUrl = `${this.baseUrl}/RemoteValidation/CheckUniqueEmailAddress`; const result = await lastValueFrom(this.httpClient.get(emailValidationUrl, { params: { id: params.data.ID, email: params.value, }, responseType: 'json', })); return result; }; } bootstrapApplication(AppComponent, { providers: [ provideZoneChangeDetection({ eventCoalescing: true, runCoalescing: true }), provideHttpClient(withFetch()), ], });

<!DOCTYPE html> <html lang="en"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/26.1.5/css/dx.light.css" /> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> <script src="https://cdn.jsdelivr.net/npm/zone.js@0.16.2/bundles/zone.umd.js"></script> <script src="./bundle.js" type="module"></script> </body> </html>