public string GetNetwork2() {
//            string url = "http://whois.pconline.com.cn/ip.jsp";
            string url = "http://counter.sina.com.cn/ip";
            string ip = SitePower.Common.StringHelper.GetClientIP();
            string query = "ip=" + ip;
            url += "?ip=" + ip;
            string text = GetResponseText(url, query);
            int startstr=text.IndexOf("Array(");
            int endstr=text.IndexOf("\");");
            string[] textarray = text.Substring(startstr, (endstr - startstr)).Split(',');
            return textarray[3].Replace("\"",string.Empty).Trim();
        
        }
       
        /// <summary>
        /// 获取响应的数据流。
        /// </summary>
        /// <returns></returns>
        public Stream GetResponseStream(string API_URL, string query) {

            var data = Encoding.UTF8.GetBytes(query);

            var request = (HttpWebRequest)WebRequest.Create(API_URL);
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = data.Length;

            using (var stream = request.GetRequestStream())
                stream.Write(data, 0, data.Length);

            return request.GetResponse().GetResponseStream();
        }

        /// <summary>
        /// 获取响应的文本。
        /// </summary>
        /// <returns></returns>
        public string GetResponseText(string API_URL, string query) {
            var text = string.Empty;

            using (var reader = new StreamReader(this.GetResponseStream(API_URL, query), Encoding.Default))
                text = reader.ReadToEnd();

            return text;
        }