When an exception is raised during the update operation, use the FormViewUpdatedEventArgs.ExceptionHandled property to indicate whether the exception was handled in the event handler. When this property is set to true, the exception is considered handled and is not thrown again by the System.Web.UI.WebControls.FormView control. If this property is set to false, the exception is thrown again. To determine which exception was raised, use the FormViewUpdatedEventArgs.Exception property.