Get MAC Address using c#

Question

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Hi,

Can any one provide me the snippet to get the MAC Address.

Right now I tried a lot of snippet but they all not worked well

Snippet-1 :

C#

public static string GetMacAddress()
{
    string macAddresses = "";

    foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
    {
        if (nic.OperationalStatus == OperationalStatus.Up)
        {
            macAddresses += nic.GetPhysicalAddress().ToString();
            break;
        }
    }
    return macAddresses;
}

It returns empty string in my system

Snippet-2 :

C#

public static string GetMacAddress()
        {
            NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
            String sMacAddress = string.Empty;
            foreach (NetworkInterface adapter in nics)
            {
                if (sMacAddress == String.Empty)// only return MAC Address from first card
                {
                    IPInterfaceProperties properties = adapter.GetIPProperties();
                    sMacAddress = adapter.GetPhysicalAddress().ToString();
                }
            }
            return sMacAddress;
        }

It also returns empty string

Snippet-3 :

C#

public static PhysicalAddress GetMacAddress()
{
    foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
    {
        // Only consider Ethernet network interfaces
        if (nic.NetworkInterfaceType == NetworkInterfaceType.Ethernet &&
            nic.OperationalStatus == OperationalStatus.Up)
        {
            return nic.GetPhysicalAddress();
        }
    }
    return null;
}

It only works for Ethernet network, mine is ppp

Can any one provide me snippet to find MAC Address which works for every computer

Thanks In Advance

Posted 23-Mar-15 9:45am

binadi007

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Comments

Kornfeld Eliyahu Peter 23-Mar-15 15:56pm

Not all network interfaces has MAC address, only those has a physical network card behind it...

LGM-Developer 23-Mar-15 16:11pm

Remove the reference to the NetworkInterfaceType

nic.NetworkInterfaceType == NetworkInterfaceType.Ethernet

That snippet will now work...

BTW a PPPoE interface does have a MAC Address... In fact all ethernet devices have an address...

A network packet holds the source and destination of the packet... in the example below ff:ff:ff:ff:ff:ff is the broadcast mac address.

Frame 1 (44 bytes on wire, 44 bytes captured)
Ethernet II, Src: 00:50:da:42:d7:df, Dst: ff:ff:ff:ff:ff:ff
PPP-over-Ethernet Discovery
Version: 1
Type 1
Code Active Discovery Initiation (PADI)
Session ID: 0000
Payload Length: 24
PPPoE Tags
Tag: Service-Name
Tag: Host-Uniq
Binary Data: (16 bytes)

Dave Kreskowiak 23-Mar-15 18:25pm

First, what kind of app are you writing, ASP.NET, Windows Forms, ...? What are you using the MAC address for?

binadi007 24-Mar-15 11:16am

WPF Application. Is Processor ID Unique?

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LGM-Developer · Answer 1 · 2015-03-23T12:07:00

C#

using System;
using System.Linq;
using System.Net.NetworkInformation;

namespace ConsoleApplication1
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            foreach (var nic in NetworkInterface.GetAllNetworkInterfaces().Where(nic => nic.OperationalStatus == OperationalStatus.Up)) {
                Console.WriteLine("{0} has an address of {1}", nic.NetworkInterfaceType, nic.GetPhysicalAddress());
            }
            Console.ReadKey();
        }
    }
}

This console app returns all the interfaces that are up...

C#

private static string[] GetUpInterfaces()
        {
            return
                NetworkInterface.GetAllNetworkInterfaces()
                    .Where(nic => nic.OperationalStatus == OperationalStatus.Up)
                    .Select(xx => xx.GetPhysicalAddress().ToString()).ToArray();
        }