DTcms结局手机版使用余额支付跳转到PC的错误

/// <summary>
        /// 余额支付专用：返回URL重写统一链接地址
        /// </summary>
        public string linkurl1(string _key,string mobile,params object[] _params)
        {
            Hashtable ht = new BLL.url_rewrite().GetList(); //获得URL配置列表
            Model.url_rewrite model = ht[_key] as Model.url_rewrite; //查找指定的URL配置节点

            //如果不存在该节点则返回空字符串
            if (model == null)
            {
                return string.Empty;
            }

            string requestDomain = HttpContext.Current.Request.Url.Authority.ToLower(); //获得来源域名含端口号
            string requestPath = HttpContext.Current.Request.RawUrl.ToLower(); //当前的URL地址
            string linkStartString = GetLinkStartString(requestPath, requestDomain); //链接前缀
            linkStartString += mobile;
            //如果URL字典表达式不需要重写则直接返回
            if (model.url_rewrite_items.Count == 0)
            {
                //检查网站重写状态
                if (config.staticstatus > 0)
                {
                    if (_params.Length > 0)
                    {
                        return linkStartString + GetUrlExtension(model.page, config.staticextension) + string.Format("{0}", _params);
                    }
                    else
                    {
                        return linkStartString + GetUrlExtension(model.page, config.staticextension);
                    }
                }
                else
                {
                    if (_params.Length > 0)
                    {
                        return linkStartString + model.page + string.Format("{0}", _params);
                    }
                    else
                    {
                        return linkStartString + model.page;
                    }
                }
            }
            //否则检查该URL配置节点下的子节点
            foreach (Model.url_rewrite_item item in model.url_rewrite_items)
            {
                //如果参数个数匹配
                if (IsUrlMatch(item, _params))
                {
                    //检查网站重写状态
                    if (config.staticstatus > 0)
                    {
                        return linkStartString + string.Format(GetUrlExtension(item.path, config.staticextension), _params);
                    }
                    else
                    {
                        string queryString = Regex.Replace(string.Format(item.path, _params), item.pattern, item.querystring, RegexOptions.None | RegexOptions.IgnoreCase);
                        if (queryString.Length > 0)
                        {
                            queryString = "?" + queryString;
                        }
                        return linkStartString + model.page + queryString;
                    }
                }
            }

            return string.Empty;
        }

 string UrlReferrer =string.Empty;
            string mobile = string.Empty;
            if (HttpContext.Current.Request.UrlReferrer!=null)
             UrlReferrer = HttpContext.Current.Request.UrlReferrer.ToString().ToLower(); //来源URL地址
            if (UrlReferrer.Contains("mobile"))
            {
                mobile = "mobile/";
            }

 Response.Redirect(new Web.UI.BasePage().linkurl1("payment", mobile, "?action=recharge")); //账户的余额不足