public string Ip2Country(string ip)        {            try            {                string url = "http://api.ipinfodb.com/v3/ip-country/?key=<your key,should regist first>&ip=" + ip;                string rst = HttpCrossDomain.Get(url,10000);                if (rst.Split(‘;‘).Count() >= 4)                    rst = rst.Split(‘;‘)[3];                else                    rst = "";                return rst;            }            catch            {                return "ERROR";            }        }

/// <summary>        /// 跨域访问        /// </summary>        /// <param name="url"></param>        /// <param name="param"></param>        /// <returns></returns>        public static string Get(string url, int time = 60000)        {            Uri address = new Uri(url);            HttpWebRequest request = WebRequest.Create(address) as HttpWebRequest;            request.Method = "GET";            request.ContentType = "application/json;charset=utf-8"; //"application/x-www-form-urlencoded";            request.Timeout = time;            string result = "";            using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)            {                StreamReader reader = new StreamReader(response.GetResponseStream());                result = reader.ReadToEnd();            }            return (result);        }