protected void PostBack() { Staff clk = (Staff)Session["LoginStaff"]; string clerkID = clk.Staff_ID; List <OrderList> OrderList = POC.GetOrderListByOrderClerk(clerkID); if (OrderList.Count == 0) { LBDesc1.Text = "You have not any submitted orders"; LBDesc1.ForeColor = System.Drawing.Color.Blue; } else { LBDesc1.Text = "Orders you have made: "; } Session["OrderList"] = OrderList; GridViewOrder.DataSource = POC.CancelPurchaseOrderGridView(OrderList); GridViewOrder.DataBind(); }