C#获取MAC地址的几种方法

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);
        /// 

        /// SendArp获取MAC地址
        /// 
        /// 
        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);

        /// 

        /// 通过适配器信息获取MAC地址
        /// 
        /// 
        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：

        /// 

        /// 通过NetBios获取MAC地址
        /// 
        /// 
        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：

        /// 

        /// 通过DOS命令获得MAC地址
        /// 
        /// 
        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：

        /// 

        /// 通过网络适配器获取MAC地址
        /// 
        /// 
        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;
        }

　　

完整代码如下:

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Net.NetworkInformation;
using System.Diagnostics;
using System.Management;
using System.Net;
using Microsoft.Win32;
using System.IO;

namespace TestMoreMethodGetMac
{
    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;
    }
    /// 

    /// 获取MAC地址的几种方法
    /// 作者：yys(Sam Young)
    /// 日期：2011-12-21
    /// 
    public class MoreMethodGetMAC
    {
        public string GetMacAddress()
        {
            if (!GetMacAddressByWMI().Equals(""))
            {
                return GetMacAddressByWMI();
            }
            if (!GetMacAddressByNetBios().Equals(""))
            {
                return GetMacAddressByNetBios();
            }
            if (!GetMacAddressBySendARP().Equals(""))
            {
                return GetMacAddressBySendARP();
            }
            if (!GetMacAddressByAdapter().Equals(""))
            {
                return GetMacAddressByAdapter();
            }
            if (!GetMacAddressByDos().Equals(""))
            {
                return GetMacAddressByDos();
            }
            return "";
        }

        /// 

        /// 通过WMI获得电脑的mac地址
        /// 
        /// 
        public string GetMacAddressByWMI()
        {
            string mac = "";
            try
            {
                ManagementObjectSearcher query = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration WHERE IPEnabled = 'TRUE'");
                ManagementObjectCollection queryCollection = query.Get();

                foreach (ManagementObject mo in queryCollection)
                {
                    if (mo["IPEnabled"].ToString() == "True")
                    {
                        mac = mo["MacAddress"].ToString();
                        break;
                    }

                }
            }
            catch (Exception ex)
            {
            }
            return mac;
        }

        [DllImport("Iphlpapi.dll")]
        static extern int SendARP(Int32 DestIP, Int32 SrcIP, ref Int64 MacAddr, ref Int32 PhyAddrLen);
        /// 

        /// SendArp获取MAC地址
        /// 
        /// 
        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 "";
            }
        }





        [DllImport("Iphlpapi.dll")]
        public static extern uint GetAdaptersAddresses(uint Family, uint flags, IntPtr Reserved,
            IntPtr PAdaptersAddresses, ref uint pOutBufLen);

        /// 

        /// 通过适配器信息获取MAC地址
        /// 
        /// 
        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;
        }

        /// 

        /// 通过NetBios获取MAC地址
        /// 
        /// 
        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;
        }

        /// 

        /// 通过DOS命令获得MAC地址
        /// 
        /// 
        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;
        }

        /// 

        /// 通过网络适配器获取MAC地址
        /// 
        /// 
        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;
        }
    }
}

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转载于:https://www.cnblogs.com/guohu/p/5041070.html