Displaying data in textbox and dropdownlist

No actually the problem is i m not able to get the data from database in controls..when i apply a breakpoint and check then it shows the data in code file but it is not displayed in controls...using a update panel solves the problem but i m not getting why is this happning..is it necessary to take a update panel for every controls?

Please elaborate :) Wild Guess: Check dropdownlist.SelectedValue property instead of dropdownlist.SelectedItem. The event is SelectedIndexChanged :) Mark the question as accepted if you are satisfied with it :)