Create an Angular Dashboard Application

  • 5 minutes to read

Important

If you are not familiar with the basic concepts and patterns of Angular, please review the fundamentals before you continue: angular.io.

The Web Dashboard consists of client and server parts:

Client
The client is a JavaScript application that supplies users with a UI to design and interact with a dashboard. The DashboardControl is the underlying control. The client communicates with the server using HTTP requests.
Server
The server is an ASP.NET Core or ASP.NET MVC application that handles client data requests and provides access to data sources, dashboard storage and other backend capabilities.

The tutorial creates and configures a client Angular application that contains the Web Dashboard and a server ASP.NET Core application.

View Example Run Demo

Prerequisites

Requirements

  • The script version on the client should match the library version on the server.
  • Versions of the DevExpress npm packages should be identical.

Step 1. Configure a Client Application

Create a new angular application.

ng new dashboard-app

If you create a new app with Angular v12, add the --strict=false flag to the command.

Navigate to the created folder after the project is created:

cd dashboard-app

Install the following npm packages:

npm install devexpress-dashboard@21.2.4 devexpress-dashboard-angular@21.2.4 @devexpress/analytics-core@21.2.4 devextreme@21.2.4  devextreme-angular@21.2.4 --save

You can find all the libraries in the node_modules folder after the installation is completed.

In the app.module.ts file, import the DxDashboardControlModule module.

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppComponent } from './app.component';
import { DxDashboardControlModule } from 'devexpress-dashboard-angular';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    DxDashboardControlModule    
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

Open the app.component.html file and replace its content with the following element to render the dashboard component:

<dx-dashboard-control 
  style="display: block;width:100%;height:800px;" 
  endpoint='https://demos.devexpress.com/services/dashboard/api'>
</dx-dashboard-control>

Go to the project’s src folder and open the styles.css file. Add the following global styles:

@import url("../node_modules/jquery-ui/themes/base/all.css");
@import url("../node_modules/devextreme/dist/css/dx.light.css");
@import url("../node_modules/@devexpress/analytics-core/dist/css/dx-analytics.common.css");
@import url("../node_modules/@devexpress/analytics-core/dist/css/dx-analytics.light.css");
@import url("../node_modules/@devexpress/analytics-core/dist/css/dx-querybuilder.css");
@import url("../node_modules/devexpress-dashboard/dist/css/dx-dashboard.light.css");

Use the command below to launch the application.

npm start

Open http://localhost:4200/ in your browser to see the result. The Web Dashboard displays the dashboard stored on the preconfigured server (https://demos.devexpress.com/services/dashboard/api).

Tip

Related Article: Dashboard Component for Angular

Step 2. Create a Server Application

Create a custom server application to show your data. In Visual Studio, create an ASP.NET Core 3.1+ application. Select the Empty template.

In your application, create the App_Data/Dashboards folder that will store dashboards.

Create a new empty DefaultDashboard controller and derive it from the DashboardController class:

using DevExpress.DashboardAspNetCore;
using DevExpress.DashboardWeb;
using Microsoft.AspNetCore.DataProtection;

namespace AspNetCoreDashboardBackend {
    public class DefaultDashboardController : DashboardController {
        public DefaultDashboardController(DashboardConfigurator configurator, IDataProtectionProvider dataProtectionProvider = null)
            : base(configurator, dataProtectionProvider) {
        }
    }
}

Replace the content of the Startup.cs file with the code below to configure the following parameters:

  • Configure CORS policy.
  • Add and use services for DevExpress Controls.
  • Map the dashboard route.
  • Add a JSON data Source to a data source storage.
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) {
            // Configures services to use the Web Dashboard Control.
            services
                .AddCors(options => {
                    options.AddPolicy("CorsPolicy", builder => {
                        builder.AllowAnyOrigin();
                        builder.AllowAnyMethod();
                        builder.WithHeaders("Content-Type");
                    });
                })
                .AddDevExpressControls()
                .AddControllers();
            services.AddScoped<DashboardConfigurator>((IServiceProvider serviceProvider) => {
                DashboardConfigurator configurator = new DashboardConfigurator();
                configurator.SetDashboardStorage(new DashboardFileStorage(FileProvider.GetFileInfo("App_Data/Dashboards").PhysicalPath));
                configurator.SetDataSourceStorage(CreateDataSourceStorage());
                configurator.SetConnectionStringsProvider(new DashboardConnectionStringsProvider(Configuration));
                configurator.ConfigureDataConnection += Configurator_ConfigureDataConnection;
                return configurator;
            });
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env) {
            // Registers the DevExpress middleware.
            app.UseDevExpressControls();
            app.UseRouting();
            app.UseCors("CorsPolicy");
            app.UseEndpoints(endpoints => {
                // Maps the dashboard route.
                EndpointRouteBuilderExtension.MapDashboardRoute(endpoints, "api/dashboard", "DefaultDashboard");
                // Requires CORS policies.
                endpoints.MapControllers().RequireCors("CorsPolicy");
            });
        }
        public DataSourceInMemoryStorage CreateDataSourceStorage() {
            DataSourceInMemoryStorage dataSourceStorage = new DataSourceInMemoryStorage();
            DashboardJsonDataSource jsonDataSource = new DashboardJsonDataSource("Customers");
            jsonDataSource.ConnectionName = "jsonDataSourceConnection";
            jsonDataSource.RootElement = "Customers";
            dataSourceStorage.RegisterDataSource("jsonDataSourceSupport", jsonDataSource.SaveToXml());
            return dataSourceStorage;
        }
        private void Configurator_ConfigureDataConnection(object sender, ConfigureDataConnectionWebEventArgs e) {
            if (e.ConnectionName == "jsonDataSourceConnection") {
                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;
            }
        }
    }
}

In the command prompt, run the following command to start the server:

dotnet run

To use this server in the client application, go to the app.component.html file. Set the following URL as an endpoint: http://localhost:5000/api/dashboard

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

Use the command below to launch the application.

npm start

Open http://localhost:4200/ in your browser to see the result. The client Web Dashboard app uses data from the newly created server (http://localhost:5000/api/dashboard).

Step 3. Switch to Viewer Mode

Once you create and save a dashboard, you can switch your Dashboard Designer to Viewer mode. Open the app.component.html file and set the workingMode property to ViewerOnly:

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

Tip

Related Article: Property Binding

Next Steps

See Also