C#中通过SendARP读取MAC地址

C#中通过SendARP读取MAC地址：

using System.Runtime.InteropServices;

publicstaticstring GetMacBySendARP(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();

  }

}

[DllImport("Iphlpapi.dll")]

privatestaticexternint SendARP(Int32 dest, Int32 host, ref Int64 mac, ref Int32 length);

[DllImport("Ws2_32.dll")]

privatestaticextern Int32 inet_addr(string ip);