Reagarding Datagrid

Question

Hi every one, I have a problem in datagrid. I have a datagrid in my screen. I added some template columns dynamically(through codebehind). On screen it coming perfectly. When I try to submit the page the template columns which I added dynamically gets disappeared i.e(in the codebehind I cant able to get the columns which I added dynamically). Is it possible to keep the track for the coulmns I added dynamically. Thanks in Advance, Karthik G