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ObjectDataSource.Filtering Event

Occurs before a filter operation.

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

public event ObjectDataSourceFilteringEventHandler Filtering
<asp:ObjectDataSource OnFiltering="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 selected operation by setting the Cancel property of the ObjectDataSourceFilteringEventArgs to true. The event is raised only if the FilterExpression property is set.

The ObjectDataSource.Filtering event delegates to the ObjectDataSourceView.Filtering event of the ObjectDataSourceView that is associated with the ObjectDataSource control.

Security noteSecurity Note

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 DataSet or DataTable 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.

For more information about handling events, see Consuming Events.

.NET Framework

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

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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