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BaseDataBoundControl.IsBoundUsingDataSourceID Property

Gets a value indicating whether the DataSourceID property is set.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)
'Declaration
Protected ReadOnly Property IsBoundUsingDataSourceID As Boolean

Property Value

Type: System.Boolean
The value true is returned if the DataSourceID property is set to value other than String.Empty; otherwise, the value is false.

Controls such as GridView, DetailsView, FormView, and Menu use the IsBoundUsingDataSourceID property to determine whether the data-bound control is bound to an ASP.NET 2.0 data source control, such as an ObjectDataSource or SqlDataSource.

The following code example demonstrates how the IsBoundUsingDataSourceID property is used by a derived data-bound control class. The IsBoundUsingDataSourceID property is used in the PerformSelect method implementation to determine whether the DataBinding event should be raised. 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: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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