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TreeList

Web API Service

Documentation

This example demonstrates the TreeList widget communicating with a Web API service. Most of the TreeList features are enabled, including the header filter, search panel, lookup columns. All data editing and data processing operations are delegated to the server. To see the server implementation, open the TreeListDemosController tab in the MVC approach.

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<dx-tree-list id="tree-list" [dataSource]="tasksData" keyExpr="Task_ID" parentIdExpr="Task_Parent_ID" hasItemsExpr="Has_Items" [expandedRowKeys]="[1, 2]" [showRowLines]="true" [columnAutoWidth]="true" [wordWrapEnabled]="true" (onInitNewRow)="initNewRow($event)"> <dxo-remote-operations [filtering]="true" [sorting]="true" [grouping]="true"></dxo-remote-operations> <dxo-search-panel [visible]="true"></dxo-search-panel> <dxo-header-filter [visible]="true"></dxo-header-filter> <dxo-editing mode="row" [allowAdding]="true" [allowUpdating]="true" [allowDeleting]="true"> </dxo-editing> <dxi-column dataField="Task_Subject" [minWidth]="250"> <dxi-validation-rule type="required"></dxi-validation-rule> </dxi-column> <dxi-column dataField="Task_Assigned_Employee_ID" caption="Assigned" [minWidth]="120"> <dxo-lookup [dataSource]="employeesData" valueExpr="ID" displayExpr="Name"></dxo-lookup> <dxi-validation-rule type="required"></dxi-validation-rule> </dxi-column> <dxi-column dataField="Task_Status" caption="Status" [minWidth]="120"> <dxo-lookup [dataSource]="statusesData"></dxo-lookup> </dxi-column> <dxi-column dataField="Task_Start_Date" caption="Start Date" dataType="date"></dxi-column> <dxi-column dataField="Task_Due_Date" caption="Due Date" dataType="date"></dxi-column> </dx-tree-list>
import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxTreeListModule } from 'devextreme-angular'; import * as AspNetData from "devextreme-aspnet-data"; if(!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'] }) export class AppComponent { tasksData: any; employeesData: any; statusesData: Array<string>; constructor() { var url = "https://js.devexpress.com/Demos/Mvc/api/TreeListTasks"; this.tasksData = AspNetData.createStore({ key: "Task_ID", loadUrl: url + "/Tasks", insertUrl: url + "/InsertTask", updateUrl: url + "/UpdateTask", deleteUrl: url + "/DeleteTask", onBeforeSend: function(method, ajaxOptions) { ajaxOptions.xhrFields = { withCredentials: true }; } }); this.employeesData = AspNetData.createStore({ key: "ID", loadUrl: url + "/TaskEmployees" }); this.statusesData = [ "Not Started", "Need Assistance", "In Progress", "Deferred", "Completed" ]; } initNewRow(e) { e.data.Task_Status = "Not Started"; e.data.Task_Start_Date = new Date(); e.data.Task_Due_Date = new Date(); } } @NgModule({ imports: [ BrowserModule, DxTreeListModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
/deep/ #tree-list { max-height: 440px; }
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here: // https://github.com/DevExpress/devextreme-angular/blob/master/README.md System.config({ transpiler: 'ts', typescriptOptions: { module: "commonjs", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" } }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'ts': 'npm:plugin-typescript@7.0.6/lib/plugin.js', 'typescript': 'npm:typescript@2.2.2/lib/typescript.js', '@angular/core': 'npm:@angular/core@4.1.0/bundles/core.umd.js', '@angular/common': 'npm:@angular/common@4.1.0/bundles/common.umd.js', '@angular/compiler': 'npm:@angular/compiler@4.1.0/bundles/compiler.umd.js', '@angular/platform-browser': 'npm:@angular/platform-browser@4.1.0/bundles/platform-browser.umd.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@4.1.0/bundles/platform-browser-dynamic.umd.js', '@angular/http': 'npm:@angular/http@4.1.0/bundles/http.umd.js', '@angular/router': 'npm:@angular/router@4.1.0/bundles/router.umd.js', '@angular/forms': 'npm:@angular/forms@4.1.0/bundles/forms.umd.js', 'rxjs': 'npm:rxjs@5.3.1', 'devextreme': 'npm:devextreme@17.2', 'jquery': 'npm:jquery@3.1.1/dist/jquery.min.js', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'devextreme-angular': 'npm:devextreme-angular@17.2', 'devextreme-aspnet-data': 'npm:devextreme-aspnet-data@1.2.4' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme-angular': { main: 'index.js', defaultExtension: 'js' } } });
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <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=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/17.2.3/css/dx.spa.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/17.2.3/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/17.2.3/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/zone.js@0.6.25/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.19.31/dist/system.js"></script> <script src="config.js"></script> <script> System.import('app').catch(console.error.bind(console)); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> </body> </html>