//删除操作
        protected void gvUserOrder_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            int OrdersID = (int)gvUserOrder.DataKeys[e.RowIndex].Value;

            if (BLLOrder.Delete(OrdersID))
            {
                Response.Write("<script>alert('删除成功')</script>");
            }
            else
            {
                Response.Write("<script>alert('删除失败')</script>");
            }
            gvUserOrder.DataSource = BLLOrder.BLLSelectOrderAll();
            gvUserOrder.DataBind();
        }