ASP.NET(C#)获取客户端的网卡MAC代码

这两天在网上找关于获取客户端网卡的资料，网上差不多都是千篇一律的～试了好多代码，都不行～，昨天整理了一下，把代码发上来，希望对大家有所帮助吧～
１，首先要添加引用：
“项目”－－“添加引用”－－－“using System.Runtime.InteropServices; ”

２，代码：

[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)
  {
   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);
   }

}

－－－－－－－－－－－－－－－－－－－－－－－－－－
有时间，我会把这个项目文件发上去的～，好了，今天写这些吧～