下載DevExpress v20.2完整版    DevExpress v20.2漢化資源獲取

DevExpress Universal擁有.NET開發(fā)需要的所有平臺控件，包含600多個UI控件、報表平臺、DevExpress Dashboard eXpressApp 框架、適用于 Visual Studio的CodeRush等一系列輔助工具。

重要提示：使用本教程需要熟悉React的基本概念和模式，要查看這些概念，請訪問。

Step 2. 創(chuàng)建服務(wù)器應(yīng)用程序

創(chuàng)建一個自定義服務(wù)器應(yīng)用程序來顯示您的數(shù)據(jù)，請按以下步驟操作：

1. 在Visual Studio中，創(chuàng)建一個ASP.NET Core 3.1應(yīng)用程序，選擇 Empty template。

2. 創(chuàng)建將存儲儀表板的App_Data / Dashboards文件夾。

3. 用以下代碼替換Startup.cs文件的內(nèi)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("http://raw.githubusercontent.com/DevExpress-Examples/DataSources/master/JSON/customers.json");
JsonSourceConnectionParameters jsonParams = new JsonSourceConnectionParameters();
jsonParams.JsonSource = new UriJsonSource(fileUri);
e.ConnectionParameters = jsonParams; 
}
}
}
}

4. 運行以下命令來啟動服務(wù)器：

cmd

dotnet run

5. 要在客戶端應(yīng)用程序中使用此服務(wù)器，請?zhí)D(zhuǎn)到app.component.html文件。 將以下URL設(shè)置為端點：http：// localhost：5000 / api / dashboard

html

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

Step 3. 切換到Viewer模式

創(chuàng)建并保存儀表板后，您可以將儀表板設(shè)計器切換到模式。

1. 打開app.component.html文件，并將 屬性設(shè)置為ViewerOnly：

html

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

DevExpress技術(shù)交流群2：775869749      歡迎一起進群討論