private void LoadDetailProduct(int intBillId)
        {
            DB.DB_Object.ClassBill objClassData = new DB.DB_Object.ClassBill();
            DataTable dt = objClassData.BillBillDetailSelect(intBillId);

            if (dt.Rows.Count > 0)
            {
                mylist.DataSource = dt;
                mylist.DataBind();
            }
        }