界面控件DevExpress使用教程：创建一个Angular Dashboard应用（Part 2）

DevExpress Universal拥有.NET开发需要的所有平台控件，包含DevExpress Dashboard框架等，本教程将为大家介绍如何创建一个Angular Dashboard应用。

DevExpress Universal拥有.NET开发需要的所有平台控件，包含600多个UI控件、 表平台、DevExpress Dashboard eXpressApp 框架、适用于 Visual Studio的CodeRush等一系列辅助工具。

重要提示：使用本教程需要熟悉React的基本概念和模式，要查看这些概念，请访问angular.io 。

Step 2. 创建服务器应用程序

创建一个自定义服务器应用程序来显示您的数据，请按以下步骤操作：

1. 在Visual Studio中，创建一个ASP.NET Core 3.1应用程序，选择 Empty template。

2. 创建将存储仪表板的App_Data / Dashboards文件夹。

3. 用以下代码替换Startup.cs文件的内容：

using DevExpress.AspNetCore;using DevExpress.DashboardAspNetCore;using DevExpress.DashboardCommon;using DevExpress.DashboardWeb;using DevExpress.DataAccess.Json;using Microsoft.AspNetCore.Builder;using Microsoft.AspNetCore.Hosting;using Microsoft.Extensions.Configuration;using Microsoft.Extensions.DependencyInjection;using Microsoft.Extensions.FileProviders;using System;namespace AspNetCoreDashboardBackend {public class Startup {public Startup(IConfiguration configuration, IWebHostEnvironment hostingEnvironment) {Configuration = configuration;FileProvider = hostingEnvironment.ContentRootFileProvider;}public IConfiguration Configuration { get; }public IFileProvider FileProvider { get; }public void ConfigureServices(IServiceCollection services) {services// Configures CORS policies..AddCors(options => {options.AddPolicy("CorsPolicy", builder => {builder.AllowAnyOrigin();builder.AllowAnyMethod();builder.WithHeaders("Content-Type");});})// Adds the DevExpress middleware..AddDevExpressControls()// Adds controllers..AddControllers()// Configures the dashboard backend..AddDefaultDashboardController(configurator => {configurator.SetDashboardStorage(new DashboardFileStorage(FileProvider.GetFileInfo("App_Data/Dashboards").PhysicalPath));configurator.SetDataSourceStorage(CreateDataSourceStorage());configurator.ConfigureDataConnection += Configurator_ConfigureDataConnection;});}public void Configure(IApplicationBuilder app, IWebHostEnvironment env) {// Registers the DevExpress middleware.app.UseDevExpressControls();// Registers routing.app.UseRouting();// Registers CORS policies.app.UseCors("CorsPolicy");app.UseEndpoints(endpoints => {// Maps the dashboard route.EndpointRouteBuilderExtension.MapDashboardRoute(endpoints, "api/dashboard");// Requires CORS policies.endpoints.MapControllers().RequireCors("CorsPolicy");});}public DataSourceInMemoryStorage CreateDataSourceStorage() {DataSourceInMemoryStorage dataSourceStorage = new DataSourceInMemoryStorage();DashboardJsonDataSource jsonDataSource = new DashboardJsonDataSource("Customers");jsonDataSource.RootElement = "Customers";dataSourceStorage.RegisterDataSource("jsonDataSourceSupport", jsonDataSource.SaveToXml());return dataSourceStorage;}private void Configurator_ConfigureDataConnection(object sender, ConfigureDataConnectionWebEventArgs e) {if (e.DataSourceName.Contains("Customers")) {Uri fileUri = new Uri("https://raw.githubusercontent.com/DevExpress-Examples/DataSources/master/JSON/customers.json");JsonSourceConnectionParameters jsonParams = new JsonSourceConnectionParameters();jsonParams.JsonSource = new UriJsonSource(fileUri);e.ConnectionParameters = jsonParams;}}}}

4. 运行以下命令来启动服务器：

cmd

dotnet run

5. 要在客户端应用程序中使用此服务器，请跳转到app.component.html文件。 将以下URL设置为端点：http：// localhost：5000 / api / dashboard

html

<dx-dashboard-controlstyle="display: block;width:100%;height:800px;"endpoint='http://localhost:5000/api/dashboard'></dx-dashboard-control>

Step 3. 切换到Viewer模式

创建并保存仪表板后，您可以将仪表板设计器切换到Viewer模式。

1. 打开app.component.html文件，并将 workingMode属性设置为ViewerOnly：

html

<dx-dashboard-controlstyle="display: block;width:100%;height:800px;"endpoint='http://localhost:5000/api/dashboard'workingMode='ViewerOnly'></dx-dashboard-control>

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