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HierarchicalDataBoundControl.ValidateDataSource Method

Verifies that the object a data-bound control binds to is one it can work with.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

'Declaration
Protected Overrides Sub ValidateDataSource ( _
	dataSource As Object _
)

Parameters

dataSource
Type: System.Object

An object set to the DataSource property.

ExceptionCondition
InvalidOperationException

dataSource is not Nothing and implements neither the IHierarchicalEnumerable nor the IHierarchicalDataSource interface.

The ValidateDataSource method is called only in the BaseDataBoundControl class's mutator (setter) for the DataSource property. The HierarchicalDataBoundControl class checks the type of the object that is set for the DataSource property to ensure that it is an instance of the IHierarchicalEnumerable or IHierarchicalDataSource interfaces.

.NET Framework

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