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;
}
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