Lists values that specify the action that caused the editor's validation.
The validation won't occur.
The BaseEdit.DoValidate method was called.
The editor's value has been changed programmatically (e.g. in code behind).
The edit value has been changed by an end-user.
An end-user has changed the edit value and pressed the ENTER key (the BaseEdit.ValidateOnEnterKeyPressed property should be set to true).
The editor is about to lose the focus.
Values listed by this enumeration are used to set the value of the ValidationEventArgs.UpdateSource value.