C# 根据IP获取省市

 /// <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, , 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[];

             string[] newAreaArr = new string[];

             try

             {

                 //取所要的数据，这里只取省市

                 areaArr = ipData.Split('\t');

                 newAreaArr[] = areaArr[];//省

                 newAreaArr[] = areaArr[];//市

             }

             catch (Exception e)

             {

                 // TODO: handle exception

             }

             return newAreaArr;

         }