I googled very hard, but so far could not find the solution using BoundField as in my case.

This one http://www.dotnetspider.com/resources/2696-Simple-Master-Details-GridView-NET.aspx shows how to access regular template field.

I already tried using FindControl ("FirstName") or txtFirstName and it doesn't work.

I may try using Cells, but then I need to know the exact index position.

It is so easy in VFP Grid: MyTable.MyField and in ASP.NET GridView I just could not figure out a syntax. Should not be that hard!