How do we capture field's value

I am using a Detailsview on a webpage to display a few rows of data. I searched msdn and couldn't find a way on how to capture the value of the field I want on the list.

I would like to know how to use the "Header Text" of the field to pull its value.

For instance, I want the value of the field with header text "Product" on the list. How should it be done?

Please help. Thanks in advance.

mariposo