关于asp.net如何获取浏览器访问的IP地址？-木庄网络博客

本文摘自PHP中文网，作者黄舟，侵删。

本篇文章主要介绍了asp.net 获取客户端浏览器访问的IP地址的实例代码，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

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

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#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