Angular Tree List - Web API Service

import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import * as AspNetData from 'devextreme-aspnet-data-nojquery'; import { DxTreeListModule, DxTreeListTypes } from 'devextreme-angular/ui/tree-list'; if (!/localhost/.test(document.location.host)) { enableProdMode(); } let modulePrefix = ''; // @ts-ignore if (window && window.config?.packageConfigPaths) { modulePrefix = '/app'; } @Component({ selector: 'demo-app', templateUrl: `app/app.component.html`, styleUrls: [`app/app.component.css`], }) export class AppComponent { tasksData: AspNetData.CustomStore; employeesData: AspNetData.CustomStore; statusesData = [ 'Not Started', 'Need Assistance', 'In Progress', 'Deferred', 'Completed', ]; constructor() { const url = 'https://js.devexpress.com/Demos/NetCore/api/TreeListTasks'; this.tasksData = AspNetData.createStore({ key: 'Task_ID', loadUrl: `${url}/Tasks`, insertUrl: `${url}/InsertTask`, updateUrl: `${url}/UpdateTask`, deleteUrl: `${url}/DeleteTask`, onBeforeSend(method, ajaxOptions) { ajaxOptions.xhrFields = { withCredentials: true }; }, }); this.employeesData = AspNetData.createStore({ key: 'ID', loadUrl: `${url}/TaskEmployees`, }); } initNewRow(e: DxTreeListTypes.InitNewRowEvent) { 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);

::ng-deep #tree-list { max-height: 640px; }

// 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://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/ const componentNames = [ 'accordion', 'action-sheet', 'autocomplete', 'bar-gauge', 'box', 'bullet', 'button-group', 'button', 'calendar', 'chart', 'chat', 'check-box', 'circular-gauge', 'color-box', 'context-menu', 'data-grid', 'date-box', 'date-range-box', 'defer-rendering', 'diagram', 'draggable', 'drawer', 'drop-down-box', 'drop-down-button', 'file-manager', 'file-uploader', 'filter-builder', 'form', 'funnel', 'gallery', 'gantt', 'html-editor', 'linear-gauge', 'list', 'load-indicator', 'load-panel', 'lookup', 'map', 'menu', 'multi-view', 'nested', 'number-box', 'pagination', 'pie-chart', 'pivot-grid-field-chooser', 'pivot-grid', 'polar-chart', 'popover', 'popup', 'progress-bar', 'radio-group', 'range-selector', 'range-slider', 'recurrence-editor', 'resizable', 'responsive-box', 'sankey', 'scheduler', 'scroll-view', 'select-box', 'slider', 'sortable', 'sparkline', 'speed-dial-action', 'splitter', 'switch', 'tab-panel', 'tabs', 'tag-box', 'text-area', 'text-box', 'tile-view', 'toast', 'toolbar', 'tooltip', 'tree-list', 'tree-map', 'tree-view', 'validation-group', 'validation-summary', 'validator', 'vector-map', ]; window.exports = window.exports || {}; window.config = { transpiler: 'ts', typescriptOptions: { module: 'system', emitDecoratorMetadata: true, experimentalDecorators: true, }, meta: { 'typescript': { 'exports': 'ts', }, 'devextreme-aspnet-data-nojquery': { 'esModule': true, }, 'devextreme/time_zone_utils.js': { 'esModule': true, }, 'devextreme/localization.js': { 'esModule': true, }, 'devextreme/viz/palette.js': { 'esModule': true, }, '@angular/platform-browser-dynamic': { 'esModule': true, }, '@angular/platform-browser': { 'esModule': true, }, '@angular/core': { 'esModule': true, }, '@angular/common': { 'esModule': true, }, '@angular/common/http': { 'esModule': true, }, '@angular/animations': { 'esModule': true, }, '@angular/forms': { 'esModule': true, }, 'openai': { 'esModule': true, }, }, paths: { 'npm:': 'https://unpkg.com/', 'bundles:': '../../../../bundles/', 'externals:': '../../../../bundles/externals/', }, map: { 'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js', 'typescript': 'npm:typescript@4.2.4/lib/typescript.js', 'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js', /* @angular */ '@angular/compiler': 'bundles:@angular/compiler.umd.js', '@angular/platform-browser-dynamic': 'bundles:@angular/platform-browser-dynamic.umd.js', '@angular/core': 'bundles:@angular/core.umd.js', '@angular/core/primitives/signals': 'bundles:@angular/core.primitives.signals.umd.js', '@angular/common': 'bundles:@angular/common.umd.js', '@angular/common/http': 'bundles:@angular/common-http.umd.js', '@angular/platform-browser': 'bundles:@angular/platform-browser.umd.js', '@angular/platform-browser/animations': 'bundles:@angular/platform-browser.umd.js', '@angular/forms': 'bundles:@angular/forms.umd.js', /* devextreme */ 'devextreme': 'npm:devextreme@24.2.5/cjs', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.12', 'devextreme/bundles/dx.all': 'npm:devextreme@24.2.5/bundles/dx.all.js', 'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.15', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.59', /* devextreme-angular umd maps */ 'devextreme-angular': 'bundles:devextreme-angular/devextreme-angular.umd.js', 'devextreme-angular/core': 'bundles:devextreme-angular/devextreme-angular-core.umd.js', 'devextreme-angular/http': 'bundles:devextreme-angular/devextreme-angular-http.umd.js', ...componentNames.reduce((acc, name) => { acc[`devextreme-angular/ui/${name}`] = `bundles:devextreme-angular/devextreme-angular-ui-${name}.umd.js`; acc[`devextreme-angular/ui/${name}/nested`] = `bundles:devextreme-angular/devextreme-angular-ui-${name}-nested.umd.js`; return acc; }, {}), 'tslib': 'npm:tslib/tslib.js', 'rxjs': 'npm:rxjs@7.5.3/dist/bundles/rxjs.umd.js', 'rxjs/operators': 'npm:rxjs@7.5.3/dist/cjs/operators/index.js', 'devextreme-aspnet-data-nojquery': 'npm:devextreme-aspnet-data-nojquery@5.0.0/index.js', 'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js', 'luxon': 'npm:luxon@3.4.4/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign', 'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js', // Prettier 'prettier/standalone': 'npm:prettier@2.8.8/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js', }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts', }, 'devextreme': { defaultExtension: 'js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, 'rxjs': { defaultExtension: 'js', }, 'rxjs/operators': { defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@3.0.12/inferno/package.json', 'npm:rxjs@7.5.3/package.json', 'npm:rxjs@7.5.3/operators/package.json', 'npm:devexpress-diagram@2.2.15/package.json', 'npm:devexpress-gantt@4.1.59/package.json', ], }; System.config(window.config); // System.import('@angular/compiler').catch(console.error.bind(console));

<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" 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/24.2.5/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script> <script src="https://unpkg.com/zone.js@0.14.10/bundles/zone.umd.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.13/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/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>

using DevExtreme.AspNet.Data; using DevExtreme.AspNet.Mvc; using DevExtreme.MVC.Demos.Models; using DevExtreme.MVC.Demos.Models.TreeList; using Newtonsoft.Json; using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Net.Http; using System.Net.Http.Formatting; using System.Web.Http; namespace DevExtreme.MVC.Demos.Controllers.ApiControllers { [Route("api/TreeListTasks/{action}", Name = "TreeListTasks")] public class TreeListTasksController : ApiController { InMemoryTasksDataContext db = new InMemoryTasksDataContext(); [HttpGet] public HttpResponseMessage Tasks(DataSourceLoadOptions loadOptions) { var tasks = from d in db.Tasks select new Models.TreeList.EmployeeTask { Task_ID = d.Task_ID, Task_Parent_ID = d.Task_Parent_ID, Task_Owner_ID = d.Task_Owner_ID, Task_Assigned_Employee_ID = d.Task_Assigned_Employee_ID, Task_Completion = d.Task_Completion, Task_Priority = d.Task_Priority, Task_Status = d.Task_Status, Task_Subject = d.Task_Subject, Task_Start_Date = d.Task_Start_Date, Task_Due_Date = d.Task_Due_Date, Has_Items = db.Tasks.Count(task => task.Task_Parent_ID == d.Task_ID) > 0 }; return Request.CreateResponse(DataSourceLoader.Load(tasks, loadOptions)); } [HttpGet] public HttpResponseMessage TasksWithEmployees(DataSourceLoadOptions loadOptions) { var tasks = from d in db.Tasks select new Models.TreeList.EmployeeTask { Task_ID = d.Task_ID, Task_Parent_ID = d.Task_Parent_ID, Task_Owner_ID = d.Task_Owner_ID, Task_Assigned_Employee_ID = d.Task_Assigned_Employee_ID, Task_Assigned_Employee = db.TaskEmployees.Where(employee => employee.ID == d.Task_Assigned_Employee_ID).FirstOrDefault(), Task_Completion = d.Task_Completion, Task_Priority = d.Task_Priority, Task_Status = d.Task_Status, Task_Subject = d.Task_Subject, Task_Start_Date = d.Task_Start_Date, Task_Due_Date = d.Task_Due_Date }; return Request.CreateResponse(DataSourceLoader.Load(tasks, loadOptions)); } [HttpGet] public HttpResponseMessage TaskEmployees(DataSourceLoadOptions loadOptions) { return Request.CreateResponse(DataSourceLoader.Load(db.TaskEmployees, loadOptions)); } [HttpPost] public HttpResponseMessage InsertTask(FormDataCollection form) { var values = form.Get("values"); var newItem = new Models.TreeList.EmployeeTask(); JsonConvert.PopulateObject(values, newItem); Validate(newItem); if(!ModelState.IsValid) return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState.GetFullErrorMessage()); db.Tasks.Add(newItem); db.SaveChanges(); return Request.CreateResponse(HttpStatusCode.Created); } [HttpPut] public HttpResponseMessage UpdateTask(FormDataCollection form) { var key = Convert.ToInt32(form.Get("key")); var values = form.Get("values"); var employee = db.Tasks.First(e => e.Task_ID == key); JsonConvert.PopulateObject(values, employee); Validate(employee); if(!ModelState.IsValid) return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState.GetFullErrorMessage()); db.SaveChanges(); return Request.CreateResponse(HttpStatusCode.OK); } [HttpDelete] public void DeleteTask(FormDataCollection form) { var key = Convert.ToInt32(form.Get("key")); var employee = db.Tasks.First(e => e.Task_ID == key); db.Tasks.Remove(employee); db.SaveChanges(); } } }

using System; using System.Collections.Generic; namespace DevExtreme.MVC.Demos.Models.TreeList { public class InMemoryTasksDataContext : InMemoryDataContext<EmployeeTask> { public ICollection<EmployeeTask> Tasks => ItemsInternal; public IEnumerable<TaskEmployee> TaskEmployees => SampleData.SampleData.TaskEmployees; protected override IEnumerable<EmployeeTask> Source => SampleData.SampleData.EmployeeTasks; protected override int GetKey(EmployeeTask item) => item.Task_ID; protected override void SetKey(EmployeeTask item, int key) => item.Task_ID = key; } }

using System; using System.ComponentModel.DataAnnotations; using System.Text.Json.Serialization; namespace DevExtreme.MVC.Demos.Models.TreeList { [JsonConverter(typeof(JsonStringEnumConverter))] public enum Priority { Low, Normal, High, Urgent } public class EmployeeTask { public int Task_ID { set; get; } public int Task_Parent_ID { set; get; } [Required] [Display(Name = "Assigned")] public int Task_Assigned_Employee_ID { set; get; } public TaskEmployee Task_Assigned_Employee { set; get; } public int Task_Owner_ID { set; get; } [Required] [Display(Name = "Task Subject")] public string Task_Subject { set; get; } [Display(Name = "Start Date")] public DateTime Task_Start_Date { set; get; } [Display(Name = "Due Date")] public DateTime Task_Due_Date { set; get; } [Display(Name = "Status")] public string Task_Status { set; get; } public Priority Task_Priority { set; get; } public int Task_Completion { set; get; } public bool Has_Items { get; set; } } public class TaskEmployee { public int ID { set; get; } public string Name { set; get; } public string Picture { set; get; } } }