I have windows form application is connected to database with dataset and using bindingsource ,i make the form go to new record when form load by Addnew() in form_load event, i put combobox to filter bindingsource , but i have error if current record is new record because the controls is empty, if form in another saved record the filter is worked correctly, how to check if form current record is new record or no , and if new record true cancel the new record ?