Get the Row value of a gridview created dynamically using Da

Question

Hello,

 

I am trying to get the value of Row in my Gridview to use later in my code. The gridview was created dynamically as shown by the code attached.

 

The issue I am having is I don't know how to TemplateField ProductID and Quantity to use the value later in the code.The gridview displayed fine

 

Please see the Code Attached

Eric