Assembly: System.Web (in System.Web.dll)
A CheckBox control must persist some values between posts to the server for this event to work correctly. Be sure that view state is enabled for this control.
Raising an event invokes the event handler through a delegate. For more information, see How to: Consume Events in a Web Forms Application
The 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 in a derived class, be sure to call the base class's method so that registered delegates receive the event.
The following code samples use the single-file code model and may not work correctly if copied directly into a code-behind file. Each code sample must be copied into an empty text file that has an .aspx extension. For more information on the Web Forms code model, see ASP.NET Web Forms Page Code Model.