Using multiple dropdownlist in gridview control

I have tried that but it did not work for me. Actually what i am trying to do is. I am not binding the gridview to any source but i need to have dropdownlist (4) with data from sql table. Should i use empty data template to display the gridview but the gridview should have dropdownlists populated from database. No other datt is there in gridview except for the dropdownlists which are populated.. Please give me some idea where am i going wrong?