DataBoundControl.CreateDataSourceSelectArguments Methode

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Definition

Namespace:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Erstellt ein vom datengebundenen Steuerelement verwendetes DataSourceSelectArguments-Standardobjekt, wenn keine Argumente angegeben wurden.

protected:
 virtual System::Web::UI::DataSourceSelectArguments ^ CreateDataSourceSelectArguments();
protected virtual System.Web.UI.DataSourceSelectArguments CreateDataSourceSelectArguments ();
abstract member CreateDataSourceSelectArguments : unit -> System.Web.UI.DataSourceSelectArguments
override this.CreateDataSourceSelectArguments : unit -> System.Web.UI.DataSourceSelectArguments
Protected Overridable Function CreateDataSourceSelectArguments () As DataSourceSelectArguments

Gibt zurück

DataSourceSelectArguments

Ein mit DataSourceSelectArguments initialisiertes Empty-Objekt.

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie die CreateDataSourceSelectArguments -Methode in einer abgeleiteten Klasse verwendet werden kann, um ein Standardobjekt DataSourceSelectArguments abzurufen.

protected override void PerformSelect() {            

   // Call OnDataBinding here if bound to a data source using the
   // DataSource property (instead of a DataSourceID), because the
   // databinding statement is evaluated before the call to GetData.       
    if (! IsBoundUsingDataSourceID) {
        OnDataBinding(EventArgs.Empty);
    }            
    
    // The GetData method retrieves the DataSourceView object from  
    // the IDataSource associated with the data-bound control.            
    GetData().Select(CreateDataSourceSelectArguments(), 
        OnDataSourceViewSelectCallback);
    
    // The PerformDataBinding method has completed.
    RequiresDataBinding = false;
    MarkAsDataBound();
    
    // Raise the DataBound event.
    OnDataBound(EventArgs.Empty);
}

Protected Overrides Sub PerformSelect()

    ' Call OnDataBinding here if bound to a data source using the 
    ' DataSource property (instead of a DataSourceID) because the 
    ' data-binding statement is evaluated before the call to GetData.
    If Not IsBoundUsingDataSourceID Then
        OnDataBinding(EventArgs.Empty)
    End If

    ' The GetData method retrieves the DataSourceView object from the 
    ' IDataSource associated with the data-bound control.            
    GetData().Select(CreateDataSourceSelectArguments(), _
        AddressOf OnDataSourceViewSelectCallback)

    ' The PerformDataBinding method has completed.
    RequiresDataBinding = False
    MarkAsDataBound()

    ' Raise the DataBound event.
        OnDataBound(EventArgs.Empty)

End Sub

Hinweise

Die CreateDataSourceSelectArguments -Methode wird von der SelectArguments -Eigenschaft zum Initialisieren eines Standardargumentobjekts und von der DataBoundControl Implementierung der -Methode der PerformSelect -Klasse verwendet.

Gilt für:

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