>Hmm, could you please provide any example? I have no idea at all, thanks.

Basically, you can pull your DataTable out of the session object, iterate its columns and compare it to the value in your user interface controls:

DataTable MyDataTable = (DataTable)Session["MyDataTable"];
foreach (DataColumn Column in MyDataTable.Columns)
{
   // Compare the column's value to the corresponding UI control
}

Best Regards,