RadGrid and Selected Row values

[John]

Just starting with RadGrid..

Have grid with a TemplateField, which has an ImageButton.  When clicked it will show a form below the grid (not associated with grid data) with 2 textboxes and a button.  When the button is clicked, it needs to get the values associated with the row that was clicked (only 1 row can be selected) server side .  How can I get the values of specific cells in that row, server side?  I have added the DataKeyNames on the MasterTableView.  If I get the DataKeyNames is there a way to use that to get the values of the cells I want?

Trying to recreate functionality in Intersoft Solutions webUI Grid as we move to Telerix.

 

thanks