ajax请求数据,服务端输出的取巧方式

System.Threading.Thread.Sleep(500);
        Page page = new Page();
        CustomerOrders ctl = (CustomerOrders)page.LoadControl("~/CustomerOrders.ascx");
        ctl.CustomerId = customerId;
        page.Controls.Add(ctl);
        System.IO.StringWriter writer = new System.IO.StringWriter();
        HttpContext.Current.Server.Execute(page, writer, false);
        string output = writer.ToString();
        writer.Close();
        return output;