(转)C#读取MAC的几种方法

原文地址：http://www.cnblogs.com/diulela/archive/2012/04/07/2436111.html

1 通过IPConfig命令读取MAC地址

///<summary>
/// 根据截取ipconfig /all命令的输出流获取网卡Mac
///</summary>
///<returns></returns>
publicstatic List<string> GetMacByIPConfig()
{
List<string> macs =new List<string>();

  ProcessStartInfo startInfo = new ProcessStartInfo("ipconfig", "/all");
  startInfo.UseShellExecute = false;
  startInfo.RedirectStandardInput = true;
  startInfo.RedirectStandardOutput = true;
  startInfo.RedirectStandardError = true;
  startInfo.CreateNoWindow = true;
Process p = Process.Start(startInfo);
//截取输出流
StreamReader reader = p.StandardOutput;
string line = reader.ReadLine();

while (!reader.EndOfStream)
{
    if (!string.IsNullOrEmpty(line))
    {
      line = line.Trim();

if (line.StartsWith("Physical Address"))
      {
        macs.Add(line);
      }
    }

line = reader.ReadLine();
}

//等待程序执行完退出进程
p.WaitForExit();
p.Close();
reader.Close();

return macs;
}

2 通过WMI读取MAC地址

1）该方法依赖WMI的系统服务，该服务一般不会被关闭；但如果系统服务缺失或者出现问题，该方法无法取得MAC地址。

///<summary>
/// 通过WMI读取系统信息里的网卡MAC
///</summary>
///<returns></returns>
publicstatic List<string> GetMacByWMI()
{
List<string> macs =new List<string>();
try
{
    string mac ="";
    ManagementClass mc =new ManagementClass("Win32_NetworkAdapterConfiguration");
    ManagementObjectCollection moc = mc.GetInstances();
    foreach (ManagementObject mo in moc)
    {
      if ((bool)mo["IPEnabled"])
      {
        mac = mo["MacAddress"].ToString();
        macs.Add(mac);
      }
    }
   moc =null;
   mc =null;
}
catch
{
}

return macs;
}

3 通过NetworkInterface读取MAC地址

1）如果当前的网卡是禁用状态（硬件处于硬关闭状态），取不到该网卡的MAC地址，（您可以通过禁用网卡进行试验）。

2）如果当前启用了多个网卡，最先返回的地址是最近启用的网络连接的信息

//返回描述本地计算机上的网络接口的对象(网络接口也称为网络适配器)。
publicstatic NetworkInterface[] NetCardInfo()
{
return NetworkInterface.GetAllNetworkInterfaces();
}

///<summary>
/// 通过NetworkInterface读取网卡Mac
///</summary>
///<returns></returns>
publicstatic List<string> GetMacByNetworkInterface()
{
List<string> macs =new List<string>();
NetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface ni in interfaces)
{
macs.Add(ni.GetPhysicalAddress().ToString());
}
return macs;
}

4 通过SendARP读取MAC地址

///<summary>
/// 通过SendARP获取网卡Mac
/// 网络被禁用或未接入网络（如没插网线）时此方法失灵
///</summary>
///<param name="remoteIP"></param>
///<returns></returns>
publicstaticstring GetMacBySendARP(string remoteIP)
{
StringBuilder macAddress =new StringBuilder();

try
{
Int32 remote = inet_addr(remoteIP);

Int64 macInfo =new Int64();
Int32 length =6;
SendARP(remote, 0, ref macInfo, ref length);

string temp = Convert.ToString(macInfo, 16).PadLeft(12, '0').ToUpper();

int x =12;
    for (int i =0; i <6; i++)
    {
      if (i ==5)
      {
        macAddress.Append(temp.Substring(x -2, 2));
      }
      else
      {
        macAddress.Append(temp.Substring(x -2, 2) +"-");
      }
      x -=2;
    }

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);

5 从注册表读取MAC地址

常规用户可通过读取注册表项Windows Genuine Advantage获取到物理网卡地址。

1）如果注册表项被修改，则无法取得该MAC地址

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows Genuine Advantage

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