获取客户端IP

Question

在用户打开网站首页时获取他的IP并保存到数据库c#怎样获取到客户端的IP？

Answer 1

 #region 返回真实的用户IP地址         /// <summary>
         ///主要功能：返回真实的用户IP地址         
         ///创建时间：[11/13/2009]
         ///创建：V
         /// </summary>
         /// <param name="parameters"> </param>
         /// <returns>返回真实的用户IP地址</returns>        public static string IPAddress()
        {
            string result = String.Empty;            result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
            if (result != null && result != String.Empty)
            {
                //可能有代理 
                if (result.IndexOf(".") == -1)    //没有“.”肯定是非IPv4格式 
                    result = null;
                else
                {
                    if (result.IndexOf(",") != -1)
                    {
                        //有“,”，估计多个代理。取第一个不是内网的IP。 
                        result = result.Replace(" ", "").Replace("'", "");
                        string[] temparyip = result.Split(",;".ToCharArray());
                        for (int i = 0; i < temparyip.Length; i++)
                        {
                            if (IsIPAddress(temparyip[i]) && temparyip[i].Substring(0, 3) != "10." && temparyip[i].Substring(0, 7) != "192.168" && temparyip[i].Substring(0, 7) != "172.16.")
                            {
                                return temparyip[i];    //找到不是内网的地址 
                            }
                        }
                    }
                    else if (IsIPAddress(result)) //代理即是IP格式 
                        return result;
                    else
                        result = null;    //代理中的内容 非IP，取IP 
                }            }
            string IpAddress = (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null && HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != String.Empty) ? HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] : HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
            if (null == result || result == String.Empty)
                result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
            if (result == null || result == String.Empty)
                result = HttpContext.Current.Request.UserHostAddress;
            return result;
        }

Answer 2

http://topic.csdn.net/u/20090617/11/8f0432b6-84ee-49da-a55f-86b3d343ab8b.html

Answer 3

楼上的把 IsIPAddress() 方法发上来

Answer 4

http://www.cnblogs.com/shanymen/archive/2009/05/11/1454466.html

Answer 5

Request.ServerVariables["REMOTE_ADDR"] 即可。