ObjectDataSourceView.Filtering Event


Occurs before a filter operation.

 event System::Web::UI::WebControls::ObjectDataSourceFilteringEventHandler ^ Filtering;
public event System.Web.UI.WebControls.ObjectDataSourceFilteringEventHandler Filtering;
member this.Filtering : System.Web.UI.WebControls.ObjectDataSourceFilteringEventHandler 
Public Custom Event Filtering As ObjectDataSourceFilteringEventHandler 


Handle the Filtering event to perform validation operations on filter parameter values before the ObjectDataSource control performs a filter operation. You can cancel the Select operation by setting the Cancel property of the ObjectDataSourceFilteringEventArgs object to true. The event is raised, only if the FilterExpression property is set.

For more information about how to handle events, see Handling and Raising Events.


You should validate any filter parameter value that you receive from the client. The runtime simply substitutes the parameter value into the filter expression and applies it to the DataView object that is returned by the Select method. If you are using the FilterExpression property as a security measure to limit the number of items that are returned, you must validate the parameter values before the filtering occurs.

Applies to

See also