Leer la dirección MAC del adaptador de red en .NET

Question

Me gustaría poder leer la dirección MAC desde el primer adaptador de red activo usando VB.net o C# (usando .NET 3.5 SP1) para una aplicación winform

Answer 1

es necesario DllImport GetAdaptersInfo - aquí hay algo de código C#

http://www.codeguru.com/cpp/i-n/network/networkinformation/comments.php/c5451/?thread=60212

Answer 2

de http://www.dotnetjunkies.com/WebLog/jkirwan/archive/2004/02/10/6943.aspx

Dim mc As System.Management.ManagementClass 
    Dim mo As ManagementObject 
    mc = New ManagementClass("Win32_NetworkAdapterConfiguration") 
    Dim moc As ManagementObjectCollection = mc.GetInstances() 
    For Each mo In moc 
    If mo.Item("IPEnabled") = True Then 
     ListBox1.Items.Add("MAC address " & mo.Item("MacAddress").ToString()) 
    End If 
    Next 

estoy seguro de que lo ha No hay problema para portar este código a C# si necesita

Answer 3

Desde .Net 2.0 ha habido una clase NetworkInterface en el espacio de nombres System.Net.NetworkInformation que le proporcionará esta información. Prueba esto:

 foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces()) 
     { 
      if (nic.OperationalStatus == OperationalStatus.Up) 
      { 
       Console.WriteLine(nic.GetPhysicalAddress().ToString()); 
       break; 
      } 
     } 

Answer 4

Aquí es una clase de hacer eso:

using System; 
using System.Collections.Generic; 
using System.Text; 
using System.Runtime.InteropServices; 

namespace MacAddress 
{ 
    class MacAddress 
    { 
     byte[] _address; 

     public MacAddress(byte[] b) 
     { 
      if (b == null) 
       throw new ArgumentNullException("b"); 
      if (b.Length != 8) 
       throw new ArgumentOutOfRangeException("b"); 
      _address = new byte[b.Length]; 
      Array.Copy(b, _address, b.Length); 
     } 

     public byte[] Address { get { return _address; } } 

     public override string ToString() 
     { 
      return Address[0].ToString("X2", System.Globalization.CultureInfo.InvariantCulture) + ":" + 
        Address[1].ToString("X2", System.Globalization.CultureInfo.InvariantCulture) + ":" + 
        Address[2].ToString("X2", System.Globalization.CultureInfo.InvariantCulture) + ":" + 
        Address[3].ToString("X2", System.Globalization.CultureInfo.InvariantCulture) + ":" + 
        Address[4].ToString("X2", System.Globalization.CultureInfo.InvariantCulture) + ":" + 
        Address[5].ToString("X2", System.Globalization.CultureInfo.InvariantCulture); 
     } 

     public static List<MacAddress> GetMacAddresses() 
     { 
      int size = 0; 
      // this chunk of code teases out the first adapter info 
      int r = GetAdaptersInfo(null, ref size); 
      if ((r != IPConfigConst.ERROR_SUCCESS) && (r != IPConfigConst.ERROR_BUFFER_OVERFLOW)) 
      { 
       return null; 
      } 
      Byte[] buffer = new Byte[size]; 
      r = GetAdaptersInfo(buffer, ref size); 
      if (r != IPConfigConst.ERROR_SUCCESS) 
      { 
       return null; 
      } 
      AdapterInfo Adapter = new AdapterInfo(); 
      ByteArray_To_IPAdapterInfo(ref Adapter, buffer, Marshal.SizeOf(Adapter)); 

      List<MacAddress> addresses = new List<MacAddress>(); 
      do 
      { 
       addresses.Add(new MacAddress(Adapter.Address)); 
       IntPtr p = Adapter.NextPointer; 
       if (p != IntPtr.Zero) 
       { 
        IntPtr_To_IPAdapterInfo(ref Adapter, p, Marshal.SizeOf(Adapter)); 
       } 
       else 
       { 
        break; 
       } 
      } while (true); 
      return addresses; 
     } 

     // glue definitions into windows 
     [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)] 
     private struct IPAddrString 
     { 
      public IntPtr NextPointer; 
      [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4 * 4)] 
      public String IPAddressString; 
      [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4 * 4)] 
      public String IPMaskString; 
      public int Context; 
     } 

     private class IPConfigConst 
     { 
      public const int MAX_ADAPTER_DESCRIPTION_LENGTH = 128; 
      public const int MAX_ADAPTER_NAME_LENGTH = 256; 
      public const int MAX_ADAPTER_ADDRESS_LENGTH = 8; 
      public const int ERROR_BUFFER_OVERFLOW = 111; 
      public const int ERROR_SUCCESS = 0; 
     } 

     [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)] 
     private struct AdapterInfo 
     { 
      public IntPtr NextPointer; 
      public int ComboIndex; 
      [MarshalAs(UnmanagedType.ByValTStr, SizeConst = IPConfigConst.MAX_ADAPTER_NAME_LENGTH + 4)] 
      public string AdapterName; 
      [MarshalAs(UnmanagedType.ByValTStr, SizeConst = IPConfigConst.MAX_ADAPTER_DESCRIPTION_LENGTH + 4)] 
      public string Description; 
      public int AddressLength; 
      [MarshalAs(UnmanagedType.ByValArray, SizeConst = IPConfigConst.MAX_ADAPTER_ADDRESS_LENGTH)] 
      public Byte[] Address; 
      public int Index; 
      public int Type; 
      public int DhcpEnabled; 
      public IntPtr CurrentIPAddress; 
      public IPAddrString IPAddressList; 
      public IPAddrString GatewayList; 
      public IPAddrString DhcpServer; 
      public Boolean HaveWins; 
      public IPAddrString PrimaryWinsServer; 
      public IPAddrString SecondaryWinsServer; 
      public int LeaseObtained; 
      public int LeaseExpires; 
     } 
     [DllImport("Iphlpapi.dll", CharSet = CharSet.Auto)] 
     private static extern int GetAdaptersInfo(Byte[] PAdapterInfoBuffer, ref int size); 
     [DllImport("Kernel32.dll", EntryPoint = "CopyMemory")] 
     private static extern void ByteArray_To_IPAdapterInfo(ref AdapterInfo dst, Byte[] src, int size); 
     [DllImport("Kernel32.dll", EntryPoint = "CopyMemory")] 
     private static extern void IntPtr_To_IPAdapterInfo(ref AdapterInfo dst, IntPtr src, int size); 
    } 
} 

Y aquí hay algo de código de prueba:

 List<MacAddress> addresses = MacAddress.GetMacAddresses(); 
     foreach (MacAddress address in addresses) 
     { 
      Console.WriteLine(address); 
     } 

Estoy seguro de que el método ToString podría ser mejor, pero hace el trabajo.

Answer 5

using Linq.. 

using System.Net.NetworkInformation; 
.. 

NetworkInterface nic = 
    NetworkInterface.GetAllNetworkInterfaces() 
    .Where(n => n.OperationalStatus == OperationalStatus.Up).FirstOrDefault(); 

if (nic != null) 
    return nic.GetPhysicalAddress().ToString(); 

Answer 6

Parece que este es un antiguo puesto, pero sé que va a encontrarse con este hilo en busca de ayuda, así que aquí es lo que hice hoy para conseguir las direcciones MAC de todas las interfaces de red en mi portátil.

En primer lugar usted tiene que importar los siguientes

Imports System.Net.NetworkInformation 

Ésta es la función que devuelve todas las direcciones MAC en una matriz de cadenas

Private Function GetMAC() As String() 
    Dim MACAddresses(0) As String 
    Dim i As Integer = 0 
    Dim NIC As NetworkInterface 

    For Each NIC In NetworkInterface.GetAllNetworkInterfaces 
     ReDim Preserve MACAddresses(i) 
     MACAddresses(i) = String.Format("{0}", NIC.GetPhysicalAddress()) 
     i += 1 
    Next 
    Return MACAddresses 
End Function 

Answer 7

Para cualquier persona que utilice el Compact Framework más limitada (.NET v2.0 CF) el siguiente código funciona tanto en Windows CE 5.0 como en CE 6.0 (leyendo solo el nombre del adaptador, pero busca "typedef struct _IP_ADAPTER_INFO" en MSDN para obtener la definición completa de la estructura devuelta):

private const int MAX_ADAPTER_NAME_LENGTH = 256; 
[DllImport ("iphlpapi.dll", SetLastError = true)] 
private static extern int GetAdaptersInfo(byte[] abyAdaptor, ref int nSize); 

// ... 
private static string m_szAdaptorName = "DM9CE1"; 

// ... 
private void GetNetworkAdaptorName() 
{ 
    // The initial call is to determine the size of the memory required. This will fail 
    // with the error code "111" which is defined by MSDN to be "ERROR_BUFFER_OVERFLOW". 
    // The structure size should be 640 bytes per adaptor. 
    int nSize = 0; 
    int nReturn = GetAdaptersInfo(null, ref nSize); 

    // Allocate memory and get data 
    byte[] abyAdapatorInfo = new byte[nSize]; 
    nReturn = GetAdaptersInfo(abyAdapatorInfo, ref nSize); 
    if (nReturn == 0) 
    { 
     // Find the start and end bytes of the name in the returned structure 
     int nStartNamePos = 8; 
     int nEndNamePos = 8; 
     while ((abyAdapatorInfo[nEndNamePos] != 0) && 
        ((nEndNamePos - nStartNamePos) < MAX_ADAPTER_NAME_LENGTH)) 
     { 
      // Another character in the name 
      nEndNamePos++; 
     } 

     // Convert the name from a byte array into a string 
     m_szAdaptorName = Encoding.UTF8.GetString(
      abyAdapatorInfo, nStartNamePos, (nEndNamePos - nStartNamePos)); 
    } 
    else 
    { 
     // Failed? Use a hard-coded network adaptor name. 
     m_szAdaptorName = "DM9CE1"; 
    } 
}