If the System.Web.UI.WebControls.Parameter object is not contained by a System.Web.UI.WebControls.ParameterCollection collection, calling the Parameter.OnParameterChanged method has no effect. If the System.Web.UI.WebControls.Parameter object is contained by a System.Web.UI.WebControls.ParameterCollection collection, Parameter.OnParameterChanged raises the ParameterCollection.ParametersChanged event of the collection.

If the System.Web.UI.WebControls.ParameterCollection collection is contained by a data source control, the ParameterCollection.ParametersChanged event raises the data source control's System.Web.UI.IDataSource.DataSourceChanged event, causing any data-bound controls to rebind.

Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.

The Parameter.OnParameterChanged method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in System.Web.dll)
Assembly Versions: 2.0.0.0
Since: .NET 2.0