Lists values that specify the action that caused the editor's validation.
The BaseEdit.DoValidate method was called.
The validation won't occur.
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.
The edit value has been changed by an end-user.
The editor's value has been changed programmatically (e.g. in code behind).
Values listed by this enumeration are used to set the value of the ValidationEventArgs.UpdateSource value.