How to work Collapsible Panel inside GridView in asp.net

Question

I have a gridview showing an bus services . It's set up so that it only shows the available seats and layout structure . What I would like to do is using a collapsible panel in each of the gridview's rows so that when a  viewseats is clicked, the content appears below the view seats . I've tried several ways (that makes sense to me) but I can't seem to make this work. I don't know if it's even possible to use the collapsible panel this way. Any suggestions?