asp.net 获取客户端浏览器访问的IP地址的实例代码

来源：软文情感网

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