/// 
                 /// 通过IP得到IP所在地省市（Porschev）                 /// 
                 ///                  /// 
                      private string GetAddressByIP(string ip)        {            string res = String.Empty;            string url = "http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json&ip=" + ip;            HttpItem item = new HttpItem            {                Url = url,                Method = "POST",                Accept = "application/json",                ContentType = "application/x-www-form-urlencoded"            };            //得到请求结果            string result = helper.GetHtml(item).Html;            result = ConvertUnicode2Chinese(result);            JObject obj = (JObject)result.JsonToObject();            if (obj != null)            {                //{ "ret":1,"start":"115.28.0.0","end":"115.29.255.255","country":"中国","province":"北京","city":"北京","district":"","isp":"电信","type":"机房","desc":"中国万网机房电信"}                res = obj["province"].ToString() + obj["city"].ToString();            }            return res;        }        /// 
        /// 将Unicode编码转换成中文        /// 
        ///         /// 
             private string ConvertUnicode2Chinese(string result)        {            Regex reg = new Regex(@"(?i)\\[uU]([0-9a-f]{4})");            return reg.Replace(result, delegate(Match m)            {                return ((char)Convert.ToInt32(m.Groups[1].Value, 16)).ToString();            });        }