how to bind dropdown when data is upadting on editing time i

Question

hi frnds

 

how to bind dropdown when data is upadting on editing time in asp.net .

i am using same page for isert n update with multiple dropdown list.my data is insert successfully .

and this data i am dispalying in gridview .here i kept edit or delete button .

so if i click on edit page my page is open but is is not binding which data i insert in data base how to do this ?