C#实现自动获取电脑MAC地址

2025-09-24 12:22 开发作者：加号3

自动获取电脑MAC地址

完整代码

  /// <summary>
  /// 获取电脑MAC地址
  /// </summary>
  /// <returns></returns>
  public static List<string> GetMacByWmi()
  {
      string key = "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}\\";
      List<string> macList = new List<string>();
      try
      {
          NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
          foreach (NetworkInterface adapter in nics)
          {
              if (adapter.NetworkInterfaceType == Nethttp://www.devze.comworkInterfaceType.Ethernet && adapter.GetPhysicalAddress(qpQLHK).ToString().Length != 0)
              {
                  string fRegistryKey = key + adapter.Id + "\\Connection";
                  RegistryKey rk = Registry.LocalMachine.OpenSubKey(fRegistryKey, false);
                  if (rk != null)
                  {
                      //string fPnpInstanceID = rk.GetValue("PnpInstanceID", "").ToString();
                      //if (fPnpInstanceID.Length > 3 && fPnpInstanceID.Substring(0, 3) == "PCI")
                      {
                          string macAddress = adapter.GetPhysicalAddress().ToString();
                          for (int i = 1; i < 6; i++)
                          {
                              macAddress = macAddress.Insert(3 * i - 1, "-");
                          }
                          macList.Add(macAddress);
                          //break;
                      }
                  }
              }
          }
      }
      catc编程客栈h (Exception ex)
      {
      }
      return macList;
  }

C#获取本地IP和MAC地址

实现代码

using System;
using System.Management;
using System.Net;
 
 public class Program
    {
        static void Main(string[] arg编程s)
        {
            try
            {
                string ip = "";
                string mac = "";
                ManagementClass mc;
                string hostInfo = Dns.GetHostName();
                //IP地址
                //System.Net.IPAddress[] addressList = Dns.GetHostByName(Dns.GetHostName()).AddressList;这个过时
                  System.Net.IPAddress[] addressList = Dns.GetHostEntry(Dns.GetHostName()).AddressList;
                for (int i = 0; i < addressList.Length; i++)
                {
                    ip = addressList[i].ToString();
                }
                //mac地址
                mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
                ManagementObjectCollection moc = mc.GetInstances();
                foreach (ManagementObject mo in moc)
                {
                    if (mo["IPEnabled"].ToString() == "True")
                    {
                        mac = mo["MacAddress"].ToString();
                    }
                }
                //输出
                string outPutStr = "IP:{0},\n MAC地址:{1}";
                outPutStr = string.Format(outPutStr, ip, mac);
                Console.WriteLine(outPutStr);
            }
            catch (Exception e)
            { }
            Console.ReadLine();
        }
    }

方法补充

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），
F_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，

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();
         qpQLHK       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;
        }

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继续阅读：C# MAC地址 C#获取MAC地址 C#获取电脑MAC地址

C#实现自动获取电脑MAC地址

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