Notifies the ASP.NET application that the state of the System.Web.UI.WebControls.ImageButton control has changed.
The ImageButton.RaisePostDataChangedEvent member is used primarily by control developers when deriving a custom class from the System.Web.UI.WebControls.ImageButton control.
This method can be overridden in a derived class to raise change events for the System.Web.UI.WebControls.ImageButton control when it posts back to the server.