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.NET Framework Class Library

DataBoundControl.GetData Method

Retrieves a DataSourceView object that the data-bound control uses to perform data operations.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)
Protected Overridable Function GetData As DataSourceView

Return Value

Type: System.Web.UI.DataSourceView
The DataSourceView that the data-bound control uses to perform data operations. If the DataMember property is set, a specific, named DataSourceView is returned; otherwise, the default DataSourceView is returned.
Exception Condition
InvalidOperationException

Both the DataSource and DataSourceID properties are set.

- or -

The DataMember property is set but a DataSourceView object by that name does not exist.

The GetData method retrieves a DataSourceView object from the associated data source control by calling the GetDataSource method. If the DataSource property is used to identify a data source, a default DataSourceView object is created.

The following code example demonstrates how the GetData method is called to retrieve the DataSourceView object from the associated data source control and the Select method is called to retrieve the data. This code example is part of a larger example provided for the DataBoundControl class.

    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 'PerformSelect

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0