C#获取电脑网卡MAC地址的方法详解

/// <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 == 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();
                    //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;
                    }
                }
            }
        }
    }
    catch (Exception ex)
    {
    }
    return macList;
}

// 排除虚拟网卡的关键字
string[] virtualKeywords = {
    "virtual", "vmware", "hyper-v", "virtualbox", 
    "vpn", "tunnel", "tap-windows", "wireguard"
};

// 原始格式: 001A2B3C4D5E
string raw = "001A2B3C4D5E";

// 转换为冒号格式: 00:1A:2B:3C:4D:5E
string colon = string.Join(":", Enumerable.Range(0, 6)
    .Select(i => raw.Substring(i * 2, 2)));

// 转换为连字符格式: 00-1A-2B-3C-4D-5E
string hyphen = string.Join("-", Enumerable.Range(0, 6)
    .Select(i => raw.Substring(i * 2, 2)));