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c#通過(guò)ip獲取地理信息

更新時(shí)間：2014年01月27日 16:46:48 作者：

這篇文章主要介紹了c#通過(guò)ip獲取地理信息的方法，這里是通過(guò)cz88和ip138查詢的

/// <summary>
      /// 通過(guò)IP得到IP所在地省市（Porschev）
      /// </summary>
      /// <param name="ip"></param>
      /// <returns></returns>
      public string GetAdrByIp(string ip)
      {
          string url = "http://www.cz88.net/ip/?ip=" + ip;
          string regStr = "(?<=<span\\s*id=\\\"cz_addr\\\">).*?(?=</span>)";
          //得到網(wǎng)頁(yè)源碼
          string html = GetHtml(url);
          Regex reg = new Regex(regStr, RegexOptions.None);
          Match ma = reg.Match(html);
          html = ma.Value;
          string[] arr = html.Split(' ');
          return arr[0];
      }
      /// <summary>
      /// 獲取HTML源碼信息(Porschev)
      /// </summary>
      /// <param name="url">獲取地址</param>
      /// <returns>HTML源碼</returns>
      public string GetHtml(string url)
      {
          string str = "";
          try
          {
              Uri uri = new Uri(url);
              WebRequest wr = WebRequest.Create(uri);
              Stream s = wr.GetResponse().GetResponseStream();
              StreamReader sr = new StreamReader(s, Encoding.Default);
              str = sr.ReadToEnd();
          }
          catch (Exception e)
          {
          }
          return str;
      }
      /// <summary>
      /// 得到真實(shí)IP以及所在地詳細(xì)信息（Porschev）
      /// </summary>
      /// <returns></returns>
      public string GetIpDetails()
      {
          //設(shè)置獲取IP地址和國(guó)家源碼的網(wǎng)址
          string url = "http://www.ip138.com/ips8.asp";
          string regStr = "(?<=<td\\s*align=\\\"center\\\">)[^<]*?(?=<br/><br/></td>)";
          //IP正則
          string ipRegStr = "((2[0-4]\\d|25[0-5]|[01]?\\d\\d?)\\.){3}(2[0-4]\\d|25[0-5]|[01]?\\d\\d?)";
          //IP地址
          string ip = string.Empty;
          //國(guó)家
          string country = string.Empty;
          //省市
          string adr = string.Empty;
          //得到網(wǎng)頁(yè)源碼
          string html = GetHtml(url);
          Regex reg = new Regex(regStr, RegexOptions.None);
          Match ma = reg.Match(html); html = ma.Value;
          Regex ipReg = new Regex(ipRegStr, RegexOptions.None);
          ma = ipReg.Match(html);
          //得到IP
          ip = ma.Value;
          int index = html.LastIndexOf("：") + 1;
          //得到國(guó)家
          country = html.Substring(index);
          adr = GetAdrByIp(ip);
          return "IP：" + ip + " 國(guó)家：" + country + " 省市：" + adr;
      }