read data from gridview

Question

hello friends,

 i have one webfrom... and in webform one text box and one dropdown control , gridview control and also a button control when insert data and click button control then all data show in gridview conrol... in gridview data is updating this condition is proper work...

 

But my problem is this when i click edit button in gridview then according to id data are show in textbox and dropdown control... about this problem i have no any idea please help me