Add a button link to a single grid view row

Question

Hi Does anyone know how to add a button link to a grid view to a single row in a grid view, rather than the entire column?

At the moment I have this:

Customer	Sales
Customer A	1000
Customer B	1005
Customer C	2500

However I want this:

Customer	Sales
Customer A	1000
Customer B	1005
Customer C	2500

I have created this first grid view using the following :

http://technico.qnownow.com/using-gridview-in-asp-net-c-part-2/

Thank you for your help.