how to move selected row from gridview1 to gridview2

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C#

ASP.NET

Hi

I am working on a shopping cart application.

When shopper selects a product in gridview1 it will be added to cart ie gridview2.

(is it good practice to use gridview for shopping cart?? any suggestions??)

I am able to move one row from gv1 to gv2.

but when the second row is moved to gv2, then it should be added to
the second row of the gv2 and accordingly third row to third row of the gv2.

now every time i select a row in gridview1, it replaces the first row of gridview2.

how to overcome this problem??

Thanks
Pradeep