protected void Bind() { Label3.Text = cartItemService.GetTotalPriceByCustomerId(Convert.ToInt32(Session["CustomerId"])).ToString(); GridView1.DataSource = cartItemService.GetCartItemsByCustomerId(Convert.ToInt32(Session["CustomerId"])); GridView1.DataBind(); if (GridView1.Rows.Count != 0) { Panel1.Visible = true; Label4.Text = ""; } else { Panel1.Visible = false; Label4.Text = "购物车内没有添加商品,请先购物!"; } }