C#获取电脑MAC地址（物理地址）的几种方法

方法一：根据截取ipconfig /all命令的输出流获取网卡Mac，支持不同语言编码(容错性最好) （ps：如果想要查看电脑的mac地址，可以按住Win+R键打开dos命令窗口，输入cmd回车，在命令窗口输入ipconfig /all 即可查看本机mac地址）
方法二： 通过WMI读取系统信息里的网卡MAC
方法三：通过NetworkInterface读取网卡MAC
 

  废话不多说，上代码，获取MAC地址的三种方法封装在MacAddressHelper类中，要想调用的话直接 new一个实例，然后调用内部方法即可。

//调用方法
MacAddressHelper macHelper = new MacAddressHelper();
//调用方法一
string mac1 = macHelper.GetMacByIpConfig();
//调用方法二
string mac2 = macHelper.GetMacByWmi();
//调用方法三
string mac3 = macHelper.GetMacByNetworkInterface();
 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Management;
using System.Net.NetworkInformation;
using Microsoft.Win32;
using System.Diagnostics;
 
namespace Common
{
    /// <summary>
    /// MAC地址获取帮助类
    /// </summary>
    public class MacAddressHelper
    {
        ///<summary>
        /// 根据截取ipconfig /all命令的输出流获取网卡Mac，支持不同语言编码(容错性最好)（方法一）
        ///</summary>
        ///<returns></returns>
        public string GetMacByIpConfig()
        {
            List<string> macs = new List<string>();
            var runCmd = ExecuteInCmd("chcp 437&&ipconfig/all");
            foreach (var line in runCmd.Split(Environment.NewLine.ToCharArray(), StringSplitOptions.RemoveEmptyEntries).Select(l => l.Trim()))
            {
                if (!string.IsNullOrEmpty(line))
                {
                    if (line.StartsWith("Physical Address"))
                    {
                        macs.Add(line.Substring(36));
                    }
                    else if (line.StartsWith("DNS Servers") && line.Length > 36 && line.Substring(36).Contains("::"))
                    {
                        macs.Clear();
                    }
                    else if (macs.Count > 0 && line.StartsWith("NetBIOS") && line.Contains("Enabled"))
                    {
                        return macs.Last();
                    }
                }
            }
            return macs.FirstOrDefault();
        }
        ///<summary>
        /// 通过WMI读取系统信息里的网卡MAC(方法二)
        ///</summary>
        ///<returns></returns>
        public string GetMacByWmi()
        {
            try
            {
                //创建ManagementClass对象
                ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
                ManagementObjectCollection moc = mc.GetInstances();
                string macAddress = string.Empty;
                foreach (ManagementObject mo in moc)//遍历获取的集合
                {
                    if ((bool)mo["IPEnabled"])//判断IPEnabled的属性是否为true
                    {
                        macAddress = mo["MacAddress"].ToString();//获取网卡的序列号
                    }
                }
                return macAddress;
            }
            catch (Exception e)
            {
                //这里写异常的处理（最好写入日志文件）
                return "";
            }
        }
        /// <summary>
        /// 通过NetworkInterface读取网卡Mac（方法三）
        /// </summary>
        /// <returns></returns>
        public string GetMacByNetworkInterface() 
        {
            string key = "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}\\";
            string macAddress = string.Empty;
            try
            {
                NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
                foreach (NetworkInterface adapter in nics)
                {
                    if (adapter.NetworkInterfaceType == NetworkInterfaceType.Ethernet
                        && adapter.GetPhysicalAddress().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();
                            int fMediaSubType = Convert.ToInt32(rk.GetValue("MediaSubType", 0));
                            if (fPnpInstanceID.Length > 3 &&
                                fPnpInstanceID.Substring(0, 3) == "PCI")
                            {
                                macAddress = adapter.GetPhysicalAddress().ToString();
                                for (int i = 1; i < 6; i++)
                                {
                                    macAddress = macAddress.Insert(3 * i - 1, ":");
                                }
                                break;
                            }
                        }
 
                    }
                }
            }
            catch (Exception ex)
            {
                //这里写异常的处理（最好写入日志文件）  
            }
            return macAddress;
        }
 
        /// <summary>
        /// 执行内部命令（cmd.exe 中的命令）
        /// </summary>
        /// <param name="cmdline">命令行</param>
        /// <returns>执行结果</returns>
        public static string ExecuteInCmd(string cmdline)
        {
            using (var process = new Process())
            {
                process.StartInfo.FileName = "cmd.exe";
                process.StartInfo.UseShellExecute = false;
                process.StartInfo.RedirectStandardInput = true;
                process.StartInfo.RedirectStandardOutput = true;
                process.StartInfo.RedirectStandardError = true;
                process.StartInfo.CreateNoWindow = true;
 
                process.Start();
                process.StandardInput.AutoFlush = true;
                process.StandardInput.WriteLine(cmdline + "&exit");
 
                //获取cmd窗口的输出信息  
                string output = process.StandardOutput.ReadToEnd();
 
                process.WaitForExit();
                process.Close();
 
                return output;
            }
        }
    }
}