GridView.OnSelectedIndexChanging Method (GridViewSelectEventArgs)

 

Raises the SelectedIndexChanging event.

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

abstract OnSelectedIndexChanging : 
        e:GridViewSelectEventArgs -> unit
override OnSelectedIndexChanging : 
        e:GridViewSelectEventArgs -> unit

The SelectedIndexChanging event is raised when a row's Select button is clicked, but before the GridView control handles the select operation. This enables you to provide an event-handling method that performs a custom routine, such as canceling the selection operation, whenever this event occurs.

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

The OnSelectedIndexChanging 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.

Notes to Inheritors:

When overriding OnSelectedIndexChanging in a derived class, be sure to call the base class's OnSelectedIndexChanging method so that registered delegates receive the event.

.NET Framework
Available since 2.0
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