关于asp.net如何获取浏览器访问的IP地址？

本文介绍了asp.net 获取客户端浏览器访问的IP地址的实例代码，分享给大家，自己也留个笔记

1、js方法

!DOCTYPE htML>
     html>
     head>
       meta charset="UTF-8" />
       tITle>
    Document/title>
       script src="http://pv.sohu.COM/cityjson?ie=utf-8">
    /script>
        script type="text/javascript">
          document.write('IP地址:' + returnCitySN["cip"] + ', 城市编码:' + returnCitySN["cid"] + ', 地区:' + returnCitySN["cname"]);
       /script>
     /head>
     body>
      /body>
     /html>
    

2、后台代码实现

#region IP地址限制功能 2017-07-18      /// summary>
        ///     /// /summary>
        /// returns>
    /returns>
    public bool IsIPValidate()    {
          bool flag = false;
          string userip = GetLoginIp();
          string[] addr = GetAddressByIp(userip);
          string addrs = addr[0] + addr[1];
      if ("北京".Equals(addr[0]) || "北京".Equals(addr[1]))      {
            flag = true;
      }
          return flag;
    }
          /// summary>
        /// 获取远程访问用户的Ip地址    /// /summary>
        /// returns>
    返回Ip地址/returns>
    PRotected string GetLOGinIp()    {
          string loginip = "";
      //Request.ServerVARiables[""]--获取服务变量集合       if (Request.ServerVariables["REMOTE_ADDR"] != null) //判断发出请求的远程主机的ip地址是否为空      {
            //获取发出请求的远程主机的Ip地址        loginip = Request.ServerVariables["REMOTE_ADDR"].ToString();
      }
      //判断登记用户是否使用设置代理      else if (Request.ServerVariables["HTTP_VIA"] != null)      {
        if (Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)        {
              //获取代理的服务器Ip地址          loginip = Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
        }
        else        {
              //获取客户端IP          loginip = Request.UserHostAddress;
        }
      }
      else      {
            //获取客户端IP        loginip = Request.UserHostAddress;
      }
          return loginip;
    }
        /// summary>
        /// 根据IP获取省市    /// /summary>
    public string[] GetAddressByIp(string ip)    {
          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=1t115.193.210.0t115.194.201.255t中国t浙江t杭州t电信      string[] arr = getAreainfoList(res);
          return arr;
    }
        /// 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)    {
          //1t115.193.210.0t115.194.201.255t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)      {
        }
          return newAreaArr;
    }
          #endregion

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