asp.net 获取客户端浏览器访问的IP地址的实例代码

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

2、后台代码实现

#region IP地址限制功能 2017-07-18 
 
 
   /// 
 
   ///  
   /// 
 
   ///  
   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; 
   } 
 
 
   /// 
 
   /// 获取远程访问用户的Ip地址 
   /// 
 
   /// 返回Ip地址 
   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; 
   } 
 
 
 
 
   /// 
 
   /// 根据IP获取省市 
   /// 
 
   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; 
   } 
 
 
   /// 
 
   /// Post请求数据 
   /// 
 
   ///  
   ///  
   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; 
   } 
 
 
   /// 
 
   /// 处理所要的数据 
   /// 
 
   ///  
   ///  
   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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