Gridview-Store ProductID in a hidden field and Looping the gridview

Question

Hi,
I want to keep the 'ProductID' of the products in a hidden field in my GRIDVIEW and
the user can select the items using a tickbox in the gridview by seeing just the name of the products.
When the user hits on the Submit button, I want to get the 'ProductID' of the products in an array
(the ProductIDs). which are ticked by user in the tickbox
Any help!
Thanks