ASP.NET获取客户端IP及MAC地址

获取客户端IP:

private string GetClientIP()  {   string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];   if (null == result || result == String.Empty)   {    result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];   }

   if (null == result || result == String.Empty)   {    result = HttpContext.Current.Request.UserHostAddress;   }   return result;  }

获取MAC地址:

[DllImport("Iphlpapi.dll")]   private static extern int SendARP(Int32 dest,Int32 host,ref Int64 mac,ref Int32 length);   [DllImport("Ws2_32.dll")]  private static extern Int32 inet_addr(string ip);

  private void Page_Load(object sender, System.EventArgs e)  {   // 在此处放置用户代码以初始化页面   try   {    string userip=Request.UserHostAddress;    string strClientIP = Request.UserHostAddress.ToString().Trim();    Int32 ldest = inet_addr(strClientIP); //目的地的ip     Int32 lhost = inet_addr("");   //本地服务器的ip     Int64 macinfo = new Int64();     Int32 len = 6;     int res = SendARP(ldest,0, ref macinfo, ref len);    string mac_src=macinfo.ToString("X");    if(mac_src == "0")    {     if(userip=="127.0.0.1")      Response.Write ("正在访问Localhost!");     else      Response.Write ("欢迎来自IP为" + userip + "的朋友！" + "<br>");     return;    }

    while(mac_src.Length<12)    {     mac_src = mac_src.Insert(0,"0");    }

    string mac_dest="";

    for(int i=0;i<11;i++)    {     if (0 == (i % 2))     {      if ( i == 10 )      {       mac_dest = mac_dest.Insert(0,mac_src.Substring(i,2));      }      else      {       mac_dest ="-" + mac_dest.Insert(0,mac_src.Substring(i,2));      }     }     }

    Response.Write ("欢迎来自IP为"+userip+ "<br>" + ",MAC地址为"+mac_dest+"的朋友！"

     +   "<br>");   }   catch(Exception err)    {     Response.Write(err.Message);   }  }