private void AddToCart(string productID) { DataTable dt = (DataTable)Session["UserWholeRecord"]; BusinessAccessLayer.Cart cart = new BusinessAccessLayer.Cart { ProductID = Convert.ToInt32(productID), UserID = Convert.ToInt32(dt.Rows[0]["user_id"].ToString()) }; ECommerceBusiness ecb = new ECommerceBusiness { CartObj = cart }; ecb.AddToCart(); }