本文告诉大家如何在 dotnet core 获取 Mac 地址
因为在 dotnetcore 是没有直接和硬件相关的，所以无法通过 WMI 的方法获取当前设备的 Mac 地址
但是在 dotnet core 可以使用下面的代码拿到本机所有的网卡地址，包括物理网卡和虚拟网卡
IPGlobalProperties computerProperties = IPGlobalProperties.GetIPGlobalProperties();
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
Console.WriteLine("Interface information for {0}.{1} ",
computerProperties.HostName, computerProperties.DomainName);
if (nics == null || nics.Length < 1)
{
Console.WriteLine(" No network interfaces found.");
return;
}
Console.WriteLine(" Number of interfaces .................... : {0}", nics.Length);
foreach (NetworkInterface adapter in nics)
{
Console.WriteLine();
Console.WriteLine(adapter.Name + "," + adapter.Description);
Console.WriteLine(String.Empty.PadLeft(adapter.Description.Length, '='));
Console.WriteLine(" Interface type .......................... : {0}", adapter.NetworkInterfaceType);
Console.Write(" Physical address ........................ : ");
PhysicalAddress address = adapter.GetPhysicalAddress();
byte[] bytes = address.GetAddressBytes();
for (int i = 0; i < bytes.Length; i++)
{
// Display the physical address in hexadecimal.
Console.Write("{0}", bytes[i].ToString("X2"));
// Insert a hyphen after each byte, unless we are at the end of the
// address.
if (i != bytes.Length - 1)
{
Console.Write("-");
}
}
Console.WriteLine();
}
运行代码，下面是控制台
Interface information for lindexi.github
Number of interfaces .................... : 6
Hyper-V Virtual Ethernet Adapter #4
===================================
Interface type .......................... : Ethernet
Physical address ........................ : 00-15-5D-96-39-03
Hyper-V Virtual Ethernet Adapter #3
===================================
Interface type .......................... : Ethernet
Physical address ........................ : 1C-1B-0D-3C-47-91
Software Loopback Interface 1
=============================
Interface type .......................... : Loopback
Physical address ........................ :
Microsoft Teredo Tunneling Adapter
==================================
Interface type .......................... : Tunnel
Physical address ........................ : 00-00-00-00-00-00-00-E0
Hyper-V Virtual Ethernet Adapter
================================
Interface type .......................... : Ethernet
Physical address ........................ : 5A-15-31-73-B0-9F
Hyper-V Virtual Ethernet Adapter #2
===================================
Interface type .......................... : Ethernet
Physical address ........................ : 5A-15-31-08-13-B1
但是可以看到里面有很多不需要使用的网卡，从堆栈网找到的方法获取当前有活跃的 ip 的网卡可以通过先判断是不是本地巡回网络等，然后判断有没有网络
foreach (NetworkInterface adapter in nics.Where(c =>
c.NetworkInterfaceType != NetworkInterfaceType.Loopback && c.OperationalStatus == OperationalStatus.Up))
获取当前的网卡有没 ip 有 ip 才是需要的
IPInterfaceProperties properties = adapter.GetIPProperties();
var unicastAddresses = properties.UnicastAddresses;
foreach (var temp in unicastAddresses.Where(temp =>
temp.Address.AddressFamily == AddressFamily.InterNetwork))
{
// 这个才是需要的网卡
}
简单输出网卡使用 adapter.GetPhysicalAddress().ToString() 输出，如果需要输出带连接的请使用 GetAddressBytes 然后自己输出
我将代码作为 SourceYard 的包发布到 Nuget 通过在 Nuget 搜 lindexi.src.MacAddress.Source 就可以下载，因为这是一个源代码包，不会多引用一个程序集，也就是这个库会编译到相同的一个 dll 或 exe 这样可以提高运行性能。
下面的代码是我抽出来的，可以直接使用，建议使用 Nuget 包，而不是复制代码，因为我可能发现下面的代码需要修改，但是如果小伙伴复制了我的代码，我不知道有哪些小伙伴复制了，修改了也无法告诉他
public static void GetActiveMacAddress(string separator = "-")
{
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
//Debug.WriteLine("Interface information for {0}.{1} ",
// computerProperties.HostName, computerProperties.DomainName);
if (nics == null || nics.Length < 1)
{
Debug.WriteLine(" No network interfaces found.");
return;
}
var macAddress = new List<string>();
//Debug.WriteLine(" Number of interfaces .................... : {0}", nics.Length);
foreach (NetworkInterface adapter in nics.Where(c =>
c.NetworkInterfaceType != NetworkInterfaceType.Loopback && c.OperationalStatus == OperationalStatus.Up))
{
//Debug.WriteLine("");
//Debug.WriteLine(adapter.Name + "," + adapter.Description);
//Debug.WriteLine(string.Empty.PadLeft(adapter.Description.Length, '='));
//Debug.WriteLine(" Interface type .......................... : {0}", adapter.NetworkInterfaceType);
//Debug.Write(" Physical address ........................ : ");
//PhysicalAddress address = adapter.GetPhysicalAddress();
//byte[] bytes = address.GetAddressBytes();
//for (int i = 0; i < bytes.Length; i++)
//{
// // Display the physical address in hexadecimal.
// Debug.Write($"{bytes[i]:X2}");
// // Insert a hyphen after each byte, unless we are at the end of the
// // address.
// if (i != bytes.Length - 1)
// {
// Debug.Write("-");
// }
//}
//Debug.WriteLine("");
//Debug.WriteLine(address.ToString());
IPInterfaceProperties properties = adapter.GetIPProperties();
var unicastAddresses = properties.UnicastAddresses;
if (unicastAddresses.Any(temp => temp.Address.AddressFamily == AddressFamily.InterNetwork))
{
var address = adapter.GetPhysicalAddress();
if (string.IsNullOrEmpty(separator))
{
macAddress.Add(address.ToString());
}
else
{
macAddress.Add(string.Join(separator, address.GetAddressBytes()));
}
}
}
}
上面的方法不仅是在 dotnet core 可以使用，在 dotnet framework 程序同样调用，但是在 dotnet framework 还可以通过 WMI 获取
在 dotnet framework 使用 WMI 获取 MAC 地址方法
var managementClass = new ManagementClass("Win32_NetworkAdapterConfiguration");
var managementObjectCollection = managementClass.GetInstances();
foreach (var managementObject in managementObjectCollection.OfType<ManagementObject>())
{
using (managementObject)
{
if ((bool) managementObject["IPEnabled"])
{
if (managementObject["MacAddress"] == null)
{
return string.Empty;
}
return managementObject["MacAddress"].ToString().ToUpper();
}
}
}
输出的格式是 5A:15:31:73:B0:9F 同时输出是一个网卡
分开虚拟网卡和物理网卡方法请看 如何利用c#找到物理网卡的Mac地址 - huangtengxiao
NetworkInterface.GetPhysicalAddress Method (System.Net.NetworkInformation)
PhysicalAddress Class (System.Net.NetworkInformation)
c# - .NET Core 2.x how to get the current active local network IPv4 address? - Stack Overflow
本文会经常更新，请阅读原文： https://dotnet-campus.github.io//post/dotnet-core-%E8%8E%B7%E5%8F%96-MacAddress-%E5%9C%B0%E5%9D%80%E6%96%B9%E6%B3%95.html ，以避免陈旧错误知识的误导，同时有更好的阅读体验。
本作品采用
知识共享署名-非商业性使用-相同方式共享 4.0 国际许可协议
进行许可。欢迎转载、使用、重新发布，但务必保留文章署名
lindexi
（包含链接：
https://dotnet-campus.github.io/
），不得用于商业目的，基于本文修改后的作品务必以相同的许可发布。如有任何疑问，请
与我联系
。