LoginCancelEventArgs.Cancel Property
Assembly: System.Web (in system.web.dll)
You can use the Cancel property to indicate whether an event, such as the LoggingIn event, the LoggingOut event, or the ChangingPassword event, should be canceled.
The following code example uses the LoggingIn event to ensure that the user has entered a well-formed e-mail address in the UserName property. If not, the LoggingIn event handler sets the Cancel property to true, and an error message is displayed. For an .aspx file that can be used to run the example, see the LoginCancelEventArgs topic.
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.