创建一个Angular Dashboard应用（Part 2）
下载DevExpress v20.2完整版 DevExpress v20.2汉化资源获取DevExpress Universal拥有.NET开发需要的所有平台控件，包含600多个UI控件、报表平台、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：cmddotnet run5. 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 / dashboardhtml<dx-dashboard-control
style="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-control
style="display: block;width:100%;height:800px;"
endpoint='http://localhost:5000/api/dashboard'
workingMode='ViewerOnly'>
</dx-dashboard-control>
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