DataBoundControl.CreateDataSourceSelectArguments 方法

定義

命名空間:

System.Web.UI.WebControls

組件:

System.Web.dll

如果沒有指定引數，則會建立資料繫結控制項使用的預設 DataSourceSelectArguments 物件。

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

傳回

DataSourceSelectArguments

初始化為 DataSourceSelectArguments 的 Empty。

範例

下列程式碼範例示範如何在 CreateDataSourceSelectArguments 衍生類別中使用 方法來擷取預設 DataSourceSelectArguments 物件。

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

備註

屬性 CreateDataSourceSelectArguments 會使用 SelectArguments 方法初始化預設引數物件，以及 DataBoundControl 類別的 PerformSelect 方法實作。

另請參閱

• SelectArguments
• PerformSelect()