SQL Data Source

• Dec 04, 2020
• 2 minutes to read

This tutorial shows how to add the DashboardSqlDataSource to data source storage and make it available to users. The sample MDF database supplies the dashboard with data.

1. In your application, add the NWind.mdf database to the App_Data folder from the C:\Users\Public\Documents\DevExpress Demos 20.2\Components\Data directory.

2. In Web.config, specify a connection string to the database.

   <configuration>
       <connectionStrings>
           <add name="NWindConnectionString" connectionString="data source=(localdb)\mssqllocaldb;attachdbfilename=|DataDirectory|\NWind.mdf;integrated security=True;connect timeout=120" providerName="System.Data.SqlClient" />    
       </connectionStrings>
   </configuration>
   

3. In the dashboard configuration file (for example, DashboardConfig.cs / DashboardConfig.vb), create a public method that returns the configured dashboard’s data source storage (DataSourceInMemoryStorage) and define the SQL data source.

   C#

   using System;
   using DevExpress.DashboardCommon;
   using DevExpress.DashboardWeb;
   
   public static DataSourceInMemoryStorage CreateDataSourceStorage() {
       DataSourceInMemoryStorage dataSourceStorage = new DataSourceInMemoryStorage();
   
           DashboardSqlDataSource sqlDataSource = new DashboardSqlDataSource("SQL Data Source", "NWindConnectionString");
           SelectQuery query = SelectQueryFluentBuilder
               .AddTable("SalesPerson")
               .SelectAllColumnsFromTable()
               .Build("Sales Person");
           sqlDataSource.Queries.Add(query);
           dataSourceStorage.RegisterDataSource("sqlDataSource", sqlDataSource.SaveToXml());  
   
       return dataSourceStorage;
   }
   

   VB.NET

   Imports System
   Imports DevExpress.DashboardCommon
   Imports DevExpress.DashboardWeb
   
   Public Shared Function CreateDataSourceStorage() As DataSourceInMemoryStorage
       Dim dataSourceStorage As New DataSourceInMemoryStorage()
   
       Dim sqlDataSource As New DashboardSqlDataSource("SQL Data Source", "NWindConnectionString")
       Dim query As SelectQuery = SelectQueryFluentBuilder.AddTable("SalesPerson").SelectAllColumnsFromTable().Build("Sales Person")
       sqlDataSource.Queries.Add(query)
       dataSourceStorage.RegisterDataSource("sqlDataSource", sqlDataSource.SaveToXml())
   
       Return dataSourceStorage
   End Function
   

   Note

   Use one of the following approaches to specify connection settings at runtime:

   • Pass the data provider’s connection parameters (the SqlServerConnectionParametersBase descendant) to the DashboardSqlDataSource constructor.
   • Handle the ASPxDashboard.ConfigureDataConnection event.

4. Call the DashboardConfigurator.SetDataSourceStorage method to configure the data source storage. Use the created CreateDataSourceStorage method as the SetDataSourceStorage parameter.

   C#

   using System;
   using DevExpress.DashboardWeb;
   
   public static void RegisterService(RouteCollection routes) {
       routes.MapDashboardRoute("dashboardControl");
   
       // ...
   
       DashboardConfigurator.Default.SetDataSourceStorage(CreateDataSourceStorage());
   }
   

   VB.NET

   Imports System
   Imports DevExpress.DashboardWeb
   
   Public Shared Sub RegisterService(ByVal routes As RouteCollection)
       routes.MapDashboardRoute("dashboardControl")
   
       ' ...
   
       DashboardConfigurator.Default.SetDataSourceStorage(CreateDataSourceStorage())
   End Sub
   

The SQL Data Source is now available in the Web Dashboard:

Users can now bind dashboard items to data in the Web Dashboard’s UI.

Example

The example shows how to make a set of data sources available for users in the Web Dashboard application.

View Example: How to Register Data Sources for the ASP.NET MVC Dashboard Extension