how to get selected row cell value at gridview row databound

Question

hii

i have a one gridview.. in that i have some columns from database and one column is created at run time which is"FolderNo-PhotoNo"

In this column i have calculated no of folders ans photos of each client and also i have make this column as hyperlink..this link will open another page.

Now, if i click on any cell of  "FolderNo-PhotoNo" column i want to take id of that client and store it in session or pass it.

Plz help me...