c# 获取客户端ip、mac、机器名、操作系统、浏览器信息

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 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Web;

 using System.Text;
 using System.Runtime.InteropServices;

 /// <summary>
 ///NetHelper 的摘要说明
 /// </summary>
 public class NetHelper
 {
     public NetHelper()
     {

     }

     public static string GetBrowserType()
     {
         return HttpContext.Current.Request.Browser.Type;
     }

     public static string GetSysVersion()
     {
         string Agent = HttpContext.Current.Request.ServerVariables["HTTP_USER_AGENT"];

         if (Agent.IndexOf("NT 4.0") > )
         {
             return "Windows NT ";
         }
         else if (Agent.IndexOf("NT 5.0") > )
         {
             return "Windows 2000";
         }
         else if (Agent.IndexOf("NT 5.1") > )
         {
             return "Windows XP";
         }
         else if (Agent.IndexOf("NT 5.2") > )
         {
             return "Windows 2003";
         }
         else if (Agent.IndexOf("NT 6.0") > )
         {
             return "Windows Vista";
         }
         else if (Agent.IndexOf("WindowsCE") > )
         {
             return "Windows CE";
         }
         else if (Agent.IndexOf("NT") > )
         {
             return "Windows NT ";
         }
         else if (Agent.IndexOf("9x") > )
         {
             return "Windows ME";
         }
         else if (Agent.IndexOf("") > )
         {
             return "Windows 98";
         }
         else if (Agent.IndexOf("") > )
         {
             return "Windows 95";
         }
         else if (Agent.IndexOf("Win32") > )
         {
             return "Win32";
         }
         else if (Agent.IndexOf("Linux") > )
         {
             return "Linux";
         }
         else if (Agent.IndexOf("SunOS") > )
         {
             return "SunOS";
         }
         else if (Agent.IndexOf("Mac") > )
         {
             return "Mac";
         }
         else if (Agent.IndexOf("Linux") > )
         {
             return "Linux";
         }
         else if (Agent.IndexOf("Windows") > )
         {
             return "Windows";
         }
         return "unknow";

     }

     /// <summary>
     /// 如果有代理那么越过代理直接取值
     /// </summary>
     /// <returns></returns>
     public static string GetClientIp()
     {
         if (HttpContext.Current.Request.ServerVariables["HTTP_VIA"] != null)
             return HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
         else
             return HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"].ToString();
     }

     public static string GetHostName(string ipStr)
     {

         string hostName = string.Empty;
         try
         {
             System.Net.IPAddress ip = System.Net.IPAddress.Parse(ipStr);
             System.Net.IPHostEntry host = System.Net.Dns.GetHostEntry(ip);
             hostName = host.HostName;
         }
         catch
         { }
         return hostName;
     }

     [DllImport("Iphlpapi.dll")]
     static extern int SendARP(Int32 DestIP, Int32 SrcIP, ref Int64 MacAddr, ref Int32 PhyAddrLen);
     [DllImport("Ws2_32.dll")]
     static extern Int32 inet_addr(string ipaddr);
     /// <summary>
     /// SendArp获取MAC地址
     /// </summary>
     /// <param name="RemoteIP">目标机器的IP地址如(192.168.1.1)</param>
     /// <returns>目标机器的mac 地址</returns>
     public static string getMacAddr_Remote(string RemoteIP)
     {
         StringBuilder macAddress = new StringBuilder();
         try
         {
             Int32 remote = inet_addr(RemoteIP);
             Int64 macInfo = new Int64();
             Int32 length = ;
             SendARP(remote, , ref macInfo, ref length);
             string temp = Convert.ToString(macInfo, ).PadLeft(, '').ToUpper();
             int x = ;
             for (int i = ; i < ; i++)
             {
                 if (i == )
                 {
                     macAddress.Append(temp.Substring(x - , ));
                 }
                 else
                 {
                     macAddress.Append(temp.Substring(x - , ) + "-");
                 }
                 x -= ;
             }
             return macAddress.ToString();
         }
         catch
         {
             return macAddress.ToString();
         }
     }
 }

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