//获取请求网址，非法请求，返回主页        if (Request.UrlReferrer != null)        {            string requstUrl = Request.UrlReferrer.AbsolutePath.ToString();            if (requstUrl != "/Goods/SubmitOrder.aspx")            {                Response.Redirect("../Activity/Default.aspx");            }        }        else        {            Response.Redirect("../Activity/Default.aspx");        }