C#获取MAC地址的几种方法（补充版）

 关于获取本地电脑的MAC地址，除了前面说过的根据WMI获取 http://blog.csdn.net/yysyangyangyangshan/article/details/6803787，其实还有好几种方式来获取mac地址，下面一一道来。

首先需要用到的一些方法和类：

    public enum NCBCONST      {          NCBNAMSZ = 16,                       MAX_LANA = 254,                      NCBENUM = 0x37,                      NRC_GOODRET = 0x00,                  NCBRESET = 0x32,                     NCBASTAT = 0x33,                     NUM_NAMEBUF = 30,                }        [StructLayout(LayoutKind.Sequential)]      public struct ADAPTER_STATUS      {          [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]          public byte[] adapter_address;          public byte rev_major;          public byte reserved0;          public byte adapter_type;          public byte rev_minor;          public ushort duration;          public ushort frmr_recv;          public ushort frmr_xmit;          public ushort iframe_recv_err;          public ushort xmit_aborts;          public uint xmit_success;          public uint recv_success;          public ushort iframe_xmit_err;          public ushort recv_buff_unavail;          public ushort t1_timeouts;          public ushort ti_timeouts;          public uint reserved1;          public ushort free_ncbs;          public ushort max_cfg_ncbs;          public ushort max_ncbs;          public ushort xmit_buf_unavail;          public ushort max_dgram_size;          public ushort pending_sess;          public ushort max_cfg_sess;          public ushort max_sess;          public ushort max_sess_pkt_size;          public ushort name_count;      }        [StructLayout(LayoutKind.Sequential)]      public struct NAME_BUFFER      {          [MarshalAs(UnmanagedType.ByValArray, SizeConst = (int)NCBCONST.NCBNAMSZ)]          public byte[] name;          public byte name_num;          public byte name_flags;      }        [StructLayout(LayoutKind.Sequential)]      public struct NCB      {          public byte ncb_command;          public byte ncb_retcode;          public byte ncb_lsn;          public byte ncb_num;          public IntPtr ncb_buffer;          public ushort ncb_length;          [MarshalAs(UnmanagedType.ByValArray, SizeConst = (int)NCBCONST.NCBNAMSZ)]          public byte[] ncb_callname;          [MarshalAs(UnmanagedType.ByValArray, SizeConst = (int)NCBCONST.NCBNAMSZ)]          public byte[] ncb_name;          public byte ncb_rto;          public byte ncb_sto;          public IntPtr ncb_post;          public byte ncb_lana_num;          public byte ncb_cmd_cplt;          [MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)]          public byte[] ncb_reserve;          public IntPtr ncb_event;      }        [StructLayout(LayoutKind.Sequential)]      public struct LANA_ENUM      {          public byte length;          [MarshalAs(UnmanagedType.ByValArray, SizeConst = (int)NCBCONST.MAX_LANA)]          public byte[] lana;      }        [StructLayout(LayoutKind.Auto)]      public struct ASTAT      {          public ADAPTER_STATUS adapt;          [MarshalAs(UnmanagedType.ByValArray, SizeConst = (int)NCBCONST.NUM_NAMEBUF)]          public NAME_BUFFER[] NameBuff;      }      public class Win32API      {          [DllImport("NETAPI32.DLL")]          public static extern char Netbios(ref   NCB ncb);      }        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]      public class IP_Adapter_Addresses      {          public uint Length;          public uint IfIndex;          public IntPtr Next;            public IntPtr AdapterName;          public IntPtr FirstUnicastAddress;          public IntPtr FirstAnycastAddress;          public IntPtr FirstMulticastAddress;          public IntPtr FirstDnsServerAddress;            public IntPtr DnsSuffix;          public IntPtr Description;            public IntPtr FriendlyName;            [MarshalAs(UnmanagedType.ByValArray,               SizeConst = 8)]          public Byte[] PhysicalAddress;            public uint PhysicalAddressLength;          public uint flags;          public uint Mtu;          public uint IfType;            public uint OperStatus;            public uint Ipv6IfIndex;          public uint ZoneIndices;            public IntPtr FirstPrefix;      }

1、  SendArp 获取MAC地址

SendARP函数用来发送ARP数据包并在定义的MAC缓冲区中返回定义的IP对应的MAC地址

SendARP(

    IPAddr DestIP,

    IPAddr SrcIP,

    PULONG pMacAddr,

    PULONG PhyAddrLen

    );

第一个参数是IP地址的网络字节顺序，而不是一个指针，当初我就是赋值成指针而使得获取不了MAC地址。

第二个参数填0就可以

第三个参数是MAC缓冲区指针

第四个参数是一个指向一个DWORD型数值为6的指针

代码如下：

        [DllImport("Iphlpapi.dll")]          static extern int SendARP(Int32 DestIP, Int32 SrcIP, ref Int64 MacAddr, ref Int32 PhyAddrLen);          /// <summary>          /// SendArp获取MAC地址          /// </summary>          /// <returns></returns>          public string GetMacAddressBySendARP()          {              StringBuilder strReturn = new StringBuilder();              try              {                  System.Net.IPHostEntry Tempaddr = (System.Net.IPHostEntry)Dns.GetHostByName(Dns.GetHostName());                  System.Net.IPAddress[] TempAd = Tempaddr.AddressList;                  Int32 remote = (int)TempAd[0].Address;                  Int64 macinfo = new Int64();                  Int32 length = 6;                  SendARP(remote, 0, ref macinfo, ref length);                    string temp = System.Convert.ToString(macinfo, 16).PadLeft(12, '0').ToUpper();                    int x = 12;                  for (int i = 0; i < 6; i++)                  {                      if (i == 5) { strReturn.Append(temp.Substring(x - 2, 2)); }                      else { strReturn.Append(temp.Substring(x - 2, 2) + ":"); }                      x -= 2;                  }                    return strReturn.ToString();              }              catch              {                  return "";              }          }

2、通过适配器信息获取MAC地址

iphlpapi.dll是Windows IP辅助API应用程序接口模块。其中一个函数GetAdaptersAddresses：返回和适配器关联的地址

uint GetAdaptersAddresses(uint Family, uint flags, IntPtr Reserved,

            IntPtr PAdaptersAddresses, ref uint pOutBufLen);

Family：[输入]获得地址族，必须是以下值之一：

AF_INET (仅返回IPv4地址)，

       AF_INET6（仅返回IPv6地址），

       AF_UNSPEC（从所有的地址族返回地址）

Flags：[输入]返回地址类型，这个参数为0或是以下值的联合值：

GAA_FLAG_INCLUDE_PREFIX （返回IPv6地址前缀）

GAA_FLAG_SKIP_UNICAST（不返回unicast地址）

GAA_FLAG_SKIP_ANYCAST（不返回anycast地址）

GAA_FLAG_SKIP_FRIENDLY_NAME（不返回适配器的友好名称）

GAA_FLAG_SKIP_MULTICAST （不返回多点传送（multicast）地址）

GAA_FLAG_SKIP_DNS_SERVER （不返回DNS服务器地址）

Reserved：调用程序必须将此参数置为NULL

pAdapterAddresses：[输入，输出] 指向一段IP_ADAPTER_ADDRESSES缓存，成功的话，该缓存包含地址信息。

pOutBufLen：[输出] 返回pAdapterAddresses所在缓存的大小

返回值：成功，返回0；失败，返回错误代码。

代码如下：

        [DllImport("Iphlpapi.dll")]          public static extern uint GetAdaptersAddresses(uint Family, uint flags, IntPtr Reserved,              IntPtr PAdaptersAddresses, ref uint pOutBufLen);            /// <summary>          /// 通过适配器信息获取MAC地址          /// </summary>          /// <returns></returns>          public string GetMacAddressByAdapter()          {              string macAddress = "";              try              {                  IntPtr PAdaptersAddresses = new IntPtr();                    uint pOutLen = 100;                  PAdaptersAddresses = Marshal.AllocHGlobal(100);                    uint ret =                      GetAdaptersAddresses(0, 0, (IntPtr)0, PAdaptersAddresses, ref pOutLen);                    if (ret == 111)                  {                      Marshal.FreeHGlobal(PAdaptersAddresses);                      PAdaptersAddresses = Marshal.AllocHGlobal((int)pOutLen);                      ret = GetAdaptersAddresses(0, 0, (IntPtr)0, PAdaptersAddresses, ref pOutLen);                  }                    IP_Adapter_Addresses adds = new IP_Adapter_Addresses();                    IntPtr pTemp = PAdaptersAddresses;                    while (pTemp != (IntPtr)0)                  {                      Marshal.PtrToStructure(pTemp, adds);                      string adapterName = Marshal.PtrToStringAnsi(adds.AdapterName);                      string FriendlyName = Marshal.PtrToStringAuto(adds.FriendlyName);                      string tmpString = string.Empty;                        for (int i = 0; i < 6; i++)                      {                          tmpString += string.Format("{0:X2}", adds.PhysicalAddress[i]);                            if (i < 5)                          {                              tmpString += ":";                          }                      }                          RegistryKey theLocalMachine = Registry.LocalMachine;                        RegistryKey theSystem                          = theLocalMachine.OpenSubKey(@"SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces");                      RegistryKey theInterfaceKey = theSystem.OpenSubKey(adapterName);                        if (theInterfaceKey != null)                      {                          macAddress = tmpString;                          break;                      }                        pTemp = adds.Next;                  }              }              catch               { }              return macAddress;          }

3、 通过NetBios获取MAC地址

NetBIOS（网络基本输入/输出系统）是一套用于网络通讯的调用接口，包含NetBIOS Name和MAC地址等信息。该方法获取MAC地址的效率较高。

代码如下：

        /// <summary>          /// 通过NetBios获取MAC地址          /// </summary>          /// <returns></returns>          public string GetMacAddressByNetBios()          {              string macAddress = "";              try              {                  string addr = "";                  int cb;                  ASTAT adapter;                  NCB Ncb = new NCB();                  char uRetCode;                  LANA_ENUM lenum;                    Ncb.ncb_command = (byte)NCBCONST.NCBENUM;                  cb = Marshal.SizeOf(typeof(LANA_ENUM));                  Ncb.ncb_buffer = Marshal.AllocHGlobal(cb);                  Ncb.ncb_length = (ushort)cb;                  uRetCode = Win32API.Netbios(ref   Ncb);                  lenum = (LANA_ENUM)Marshal.PtrToStructure(Ncb.ncb_buffer, typeof(LANA_ENUM));                  Marshal.FreeHGlobal(Ncb.ncb_buffer);                  if (uRetCode != (short)NCBCONST.NRC_GOODRET)                      return "";                    for (int i = 0; i < lenum.length; i++)                  {                      Ncb.ncb_command = (byte)NCBCONST.NCBRESET;                      Ncb.ncb_lana_num = lenum.lana[i];                      uRetCode = Win32API.Netbios(ref   Ncb);                      if (uRetCode != (short)NCBCONST.NRC_GOODRET)                          return "";                        Ncb.ncb_command = (byte)NCBCONST.NCBASTAT;                      Ncb.ncb_lana_num = lenum.lana[i];                      Ncb.ncb_callname[0] = (byte)'*';                      cb = Marshal.SizeOf(typeof(ADAPTER_STATUS)) + Marshal.SizeOf(typeof(NAME_BUFFER)) * (int)NCBCONST.NUM_NAMEBUF;                      Ncb.ncb_buffer = Marshal.AllocHGlobal(cb);                      Ncb.ncb_length = (ushort)cb;                      uRetCode = Win32API.Netbios(ref   Ncb);                      adapter.adapt = (ADAPTER_STATUS)Marshal.PtrToStructure(Ncb.ncb_buffer, typeof(ADAPTER_STATUS));                      Marshal.FreeHGlobal(Ncb.ncb_buffer);                        if (uRetCode == (short)NCBCONST.NRC_GOODRET)                      {                          if (i > 0)                              addr += ":";                          addr = string.Format("{0,2:X}:{1,2:X}:{2,2:X}:{3,2:X}:{4,2:X}:{5,2:X}",                                adapter.adapt.adapter_address[0],                                adapter.adapt.adapter_address[1],                                adapter.adapt.adapter_address[2],                                adapter.adapt.adapter_address[3],                                adapter.adapt.adapter_address[4],                                adapter.adapt.adapter_address[5]);                      }                  }                  macAddress = addr.Replace(' ', '0');                }              catch              {              }              return macAddress;          }

4、 通过DOS命令获得MAC地址

这个就是使用ipconfig命令，并需要在程序中启用cmd，程序中使用cmd如下即可，或参见http://blog.csdn.net/yysyangyangyangshan/article/details/6799489,

代码如下：

        /// <summary>          /// 通过DOS命令获得MAC地址          /// </summary>          /// <returns></returns>          public string GetMacAddressByDos()          {              string macAddress = "";              Process p = null;              StreamReader reader = null;              try              {                  ProcessStartInfo start = new ProcessStartInfo("cmd.exe");                     start.FileName = "ipconfig";                  start.Arguments = "/all";                     start.CreateNoWindow = true;                     start.RedirectStandardOutput = true;                     start.RedirectStandardInput = true;                     start.UseShellExecute = false;                     p = Process.Start(start);                    reader = p.StandardOutput;                     string line = reader.ReadLine();                     while (!reader.EndOfStream)                  {                      if (line.ToLower().IndexOf("physical address") > 0 || line.ToLower().IndexOf("物理地址") > 0)                      {                          int index = line.IndexOf(":");                          index += 2;                          macAddress = line.Substring(index);                          macAddress = macAddress.Replace('-', ':');                          break;                      }                      line = reader.ReadLine();                  }              }              catch              {                }              finally              {                  if (p != null)                  {                      p.WaitForExit();                       p.Close();                   }                  if (reader != null)                  {                      reader.Close();                   }              }              return macAddress;          }

5、 NetworkInterface获取MAC地址

NetworkInterface，提供网络接口的配置和统计信息。NetworkInterface.GetAllNetworkInterfaces，返回描述本地计算机上的网络接口的对象。

代码如下：

 

        /// <summary>          /// 通过网络适配器获取MAC地址          /// </summary>          /// <returns></returns>          public string GetMacAddressByNetworkInformation()          {              string macAddress = "";              try              {                  NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();                  foreach (NetworkInterface adapter in nics)                  {                      if (!adapter.GetPhysicalAddress().ToString().Equals(""))                      {                          macAddress = adapter.GetPhysicalAddress().ToString();                          for (int i = 1; i < 6; i++)                          {                              macAddress = macAddress.Insert(3 * i - 1, ":");                          }                          break;                      }                  }                }              catch              {              }              return macAddress;          }

完整代码下载地址：http://download.csdn.net/download/yysyangyangyangshan/3949946