public List<Cart> UpdateCartItems() { using (ShoppingCartActions usersShoppingCart = new ShoppingCartActions()) { String cartId = usersShoppingCart.GetCartId(); usersShoppingCart.UpdateShoppingCartDatabase(cartId, getcartUpdate()); CartList.DataBind(); lblTotal.Text = String.Format(CultureInfo.GetCultureInfo("vi-VN"), "{0:c0}", usersShoppingCart.GetTotal()); List<Cart> result = usersShoppingCart.GetCartItems(); if (result.Count == 0) { LabelTotalText.Text = ""; lblTotal.Text = ""; Title_EmptyCart.Visible = true; Checkout_btn.Visible = false; Update_btn.Visible = false; } return result; } }