C# 获取客户端IP地址方法

最新推荐文章于 2024-05-06 08:00:33 发布

润小仙女

最新推荐文章于 2024-05-06 08:00:33 发布

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文章标签： c# tcp/ip 服务器

本文链接：https://blog.youkuaiyun.com/run__ning/article/details/135082492

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获取客户端IP地址

public string GetIPAddress()
        {

            string user_IP = string.Empty;
            if (System.Web.HttpContext.Current.Request.ServerVariables["HTTP_VIA"] != null)
            {
                if (System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)
                {
                    user_IP = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
                }
                else
                {
                    user_IP = System.Web.HttpContext.Current.Request.UserHostAddress;
                }
            }
            else
            {
                user_IP = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"].ToString();
                if (user_IP == "::1" || user_IP == "127.0.0.1")
                {
                    string strHostName = Dns.GetHostName();  //得到本机的主机名
                    IPHostEntry ipEntry = Dns.GetHostEntry(strHostName); //取得本机IP
                    if (ipEntry.AddressList.Length > 0)
                    {

                        foreach (var item in ipEntry.AddressList)
                        {
                            if (IsIP(item.ToString()))
                            {
                                user_IP = item.ToString(); //假设本地主机为单网卡
                            }
                        }
                    }
                }
            }
            return user_IP;
        }

检查IP地址格式

public static bool IsIP(string ip)
{
    return System.Text.RegularExpressions.Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?).){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");
}