IConnectionProviderService.LoadConnection(String) Method

Loads the specified SqlDataConnection.

Namespace: DevExpress.DataAccess.Wizard.Services

Assembly: DevExpress.DataAccess.v23.2.dll

NuGet Packages: DevExpress.DataAccess, DevExpress.Win.PivotGrid, DevExpress.Win.TreeMap

Declaration

C#

SqlDataConnection LoadConnection(
    string connectionName
)

VB.NET

Function LoadConnection(
    connectionName As String
) As SqlDataConnection

Parameters

Name	Type	Description
connectionName	String	A String value, specifying the connection name.

Returns

Type	Description
SqlDataConnection	An SqlDataConnection object.

Remarks

The following code shows how to implement the IConnectionProviderService interface:

C#

using DevExpress.DataAccess.ConnectionParameters;
using DevExpress.DataAccess.Sql;
using DevExpress.DataAccess.Wizard.Services;
// ...

public class CustomConnectionProviderService : IConnectionProviderService {
    public SqlDataConnection LoadConnection(string connectionName) {
        // Specify custom connection parameters.
        return new SqlDataConnection(connectionName, 
            new MsSqlConnectionParameters("localhost", "dataBaseName", "userName", "password", MsSqlAuthorizationType.Windows));
    }
}

VB.NET

Imports DevExpress.DataAccess.ConnectionParameters
Imports DevExpress.DataAccess.Sql
Imports DevExpress.DataAccess.Wizard.Services
' ...

Public Class CustomConnectionProviderService
    Implements IConnectionProviderService
    Public Function LoadConnection(connectionName As String) As SqlDataConnection Implements IConnectionProviderService.LoadConnection
        ' Specify custom connection parameters.
        Return New SqlDataConnection(connectionName, _ 
            New MsSqlConnectionParameters("localhost", "dataBaseName", "userName", "password", MsSqlAuthorizationType.Windows))
    End Function
End Class

The IConnectionProviderService.LoadConnection method is invoked for each connection that is serialized in the report definition file. Use the connectionName parameter to specify connection options and return an SqlDataConnection object.

Use the implemented interface in an application that invokes a report‘s Print Preview or End-User Report Designer:

• Windows Forms

  The following code adds a custom connection provider service to the report’s PrintingSystem and displays the Print Preview:

  C#

  using DevExpress.DataAccess.Wizard.Services;
  using DevExpress.XtraReports.UI;
  
  // ...
  
  XtraReport report = new XtraReport();
  report.LoadLayout("XtraReport1.repx");
  (report as IServiceContainer).AddService(typeof(IConnectionProviderService), new CustomConnectionProviderService());
  ReportPrintTool pt = new ReportPrintTool(report);
  pt.ShowPreviewDialog();
  

  VB.NET

  Imports DevExpress.DataAccess.Wizard.Services
  Imports DevExpress.XtraReports.UI
  
  ' ...
  
  Dim report As New XtraReport()
  report.LoadLayout("XtraReport1.repx")
  TryCast(report, IServiceContainer).AddService(GetType(IConnectionProviderService), New CustomConnectionProviderService())
  Dim pt As New ReportPrintTool(report)
  pt.ShowPreviewDialog()
  

  The following code invokes the implemented IConnectionProviderService interface in the End-User Report Designer‘s DesignPanelLoaded event handler and launches the End-User Report Designer:

  C#

  using DevExpress.DataAccess.Wizard.Services;
  using DevExpress.XtraReports.UI;
  
  // ...
  
  XtraReport report = new XtraReport();
  report.LoadLayout("XtraReport1.repx");
  ReportDesignTool tool = new ReportDesignTool(report);
  tool.DesignRibbonForm.DesignMdiController.DesignPanelLoaded += DesignMdiController_DesignPanelLoaded;
  tool.ShowRibbonDesignerDialog();
  
  private void ReplaceService(IServiceContainer container, Type serviceType, object serviceInstance) {
      if (container.GetService(serviceType) != null)
          container.RemoveService(serviceType);
      container.AddService(serviceType, serviceInstance);
  }
  private void DesignMdiController_DesignPanelLoaded(object sender, DevExpress.XtraReports.UserDesigner.DesignerLoadedEventArgs e) {
      ReplaceService(e.DesignerHost, typeof(IConnectionProviderService), new CustomConnectionProviderService());
  }
  

  VB.NET

  Imports DevExpress.DataAccess.Wizard.Services
  Imports DevExpress.XtraReports.UI
  
  ' ...
  
  Private report As New XtraReport()
  report.LoadLayout("XtraReport1.repx")
  Dim tool As New ReportDesignTool(report)
  AddHandler tool.DesignRibbonForm.DesignMdiController.DesignPanelLoaded, AddressOf DesignMdiController_DesignPanelLoaded
  tool.ShowRibbonDesignerDialog()
  
  private void ReplaceService(IServiceContainer container, Type serviceType, Object serviceInstance)
      If container.GetService(serviceType) IsNot Nothing Then
          container.RemoveService(serviceType)
      End If
      container.AddService(serviceType, serviceInstance)
  private void DesignMdiController_DesignPanelLoaded(Object sender, DevExpress.XtraReports.UserDesigner.DesignerLoadedEventArgs e)
      ReplaceService(e.DesignerHost, GetType(IConnectionProviderService), New CustomConnectionProviderService())
  

• WPF

  The following code adds a custom connection provider service to the report’s PrintingSystem and displays the Document Preview:

  C#

  using DevExpress.DataAccess.Wizard.Services;
  using DevExpress.XtraReports.UI;
  
  // ...
  
  XtraReport report = new XtraReport();
  report.LoadLayout("XtraReport1.repx");
  report.PrintingSystem.AddService(typeof(IConnectionProviderService), new CustomConnectionProviderService());  
  documentPreviewControl.DocumentSource = report;
  report.CreateDocument();
  

  VB.NET

  Imports DevExpress.DataAccess.Wizard.Services
  Imports DevExpress.XtraReports.UI
  
  ' ...
  
  Private report As New XtraReport()
  report.LoadLayout("XtraReport1.repx")
  report.PrintingSystem.AddService(GetType(IConnectionProviderService), New CustomConnectionProviderService())
  documentPreviewControl.DocumentSource = report
  report.CreateDocument()
  

  The following code registers the implemented IConnectionProviderService interface and launches the End-User Report Designer:

  XAML

  <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
          xmlns:dxrud="http://schemas.devexpress.com/winfx/2008/xaml/reports/userdesigner" x:Class="TestDesigner.MainWindow"
          Title="MainWindow" Height="350" Width="525">
      <dxrud:ReportDesigner Name="ReportDesigner">
          <dxrud:ReportDesigner.ServicesRegistry>
              <dxda:TypeEntry ServiceType="{x:Type dxdaw:IConnectionStorageService}" ConcreteType="{x:Type local:ConnectionStorageService}" />
              <dxda:TypeEntry ServiceType="{x:Type dxdaw:IConnectionProviderService}" ConcreteType="{x:Type local:ConnectionProviderService}" />
          </dxrud:ReportDesigner.ServicesRegistry>
      </dxrud:ReportDesigner>
  </Window>
  

• Web Report Viewer and Designer

  See the IDataSourceWizardConnectionStringsProvider interface description for instructions on how to store data connections.