ASP.Net 根据IP获取所在省市地址

        /// <summary>
        /// 根据IP获取省市
        /// </summary>
        public void GetAddressByIp()
        {
            string ip = "115.193.217.249";
            string PostUrl = "http://int.dpool.sina.com.cn/iplookup/iplookup.php?ip=" + ip;
            string res = GetDataByPost(PostUrl);//该条请求返回的数据为：res=1\t115.193.210.0\t115.194.201.255\t中国\t浙江\t杭州\t电信

            string[] arr = getAreaInfoList(res);
        }

        /// <summary>
        /// Post请求数据
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        public string GetDataByPost(string url)
        {
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
            string s = "anything";
            byte[] requestBytes = System.Text.Encoding.ASCII.GetBytes(s);
            req.Method = "POST";
            req.ContentType = "application/x-www-form-urlencoded";
            req.ContentLength = requestBytes.Length;
            Stream requestStream = req.GetRequestStream();
            requestStream.Write(requestBytes, 0, requestBytes.Length);
            requestStream.Close();

            HttpWebResponse res = (HttpWebResponse)req.GetResponse();
            StreamReader sr = new StreamReader(res.GetResponseStream(), System.Text.Encoding.Default);
            string backstr = sr.ReadToEnd();
            sr.Close();
            res.Close();
            return backstr;
        }

        /// <summary>
        /// 处理所要的数据
        /// </summary>
        /// <param name="ip"></param>
        /// <returns></returns>
        public static string[] getAreaInfoList(string ipData)
        {
            //1\t115.193.210.0\t115.194.201.255\t中国\t浙江\t杭州\t电信
            string[] areaArr = new string[10];
            string[] newAreaArr = new string[2];
            try
            {
                //取所要的数据，这里只取省市
                areaArr = ipData.Split('\t');
                newAreaArr[0] = areaArr[4];//省
                newAreaArr[1] = areaArr[5];//市
            }
            catch (Exception e)
            {
                // TODO: handle exception
            }
            return newAreaArr;
        }