Passing values on webform1 to dropdown & textbox on webform2

On Webform1 :- I have dropdown lists and textboxes using which i'm populating the gridview.

Now I want to select a row on gridview and then pass its values to "Webform2" where there is dropdown lists and text boxes.

I want the selected row values (of gridview) show up in respective dropdownlists and textboxes on webform2. and there i want to update the gridview row.

 

Basically i want to pass the gridview row values to another page for updating the selected gridview row .

 

plz guide me,

thx in advance