how to get the which textbox event fired in asp.net

Question

hi folks,


I write code in textbox textchnage event and bind all textbox .and and check the textbox is empty or not and write business logic.but problem is that .now the problem is that when the textbox is empty and press enter (i bind enter key to keypress) but event is not fired .but i write something then it works fine for me.


othewise  how i get on page load to which textbox is sender .
Please share some link