Saves changes and closes an Edit Form if data has been saved successfully.
true if data is saved successfully and an Edit Form is closed; otherwise, false.
This method saves changes, and if data is successfully saved, closes an Edit Form. If it is not possible to save data (for instance, if data is not valid), the CloseEditForm method returns false and does not close an Edit Form. To close an Edit Form without saving changes, use the GridView.HideEditForm method.