How to make a code checkbox with update in c#?

Question

Hai Friends,
 
      I ve the asp like below

GRIDVIEW


checkbox   userid     Location     Mobile     Stauts
====================================
checked        12          chena        123        enable
not cheked   17          bang         456        disbale



save (button)

when the admin choose the check box and press the "save " status only updated for  gridview table  depends on that user_id
how to make a code?