update a grid

[naren7]

im having two page using c#.net.in second page im having gridview with hyperlinkcolumn(update) and in the first page 4 textbox namely id ,fname,lname,age with update and save buttons.now my aim is to be while click the update link in gridview in the second form it navigate to first page that corresponding value will display in texbox depending upon the primary key value in the url. how to solve this