禁用网络适配器时获取MAC地址？

Question

Is there any way i can retrieve MAC Address when Network Adapter is disabled in .net?

Thanks in advance,

Answer 1

It is not possible to get the MAC address of an adapter which is disabled: this is because getting the MAC address requires querying the driver, and the driver for a disabled adapter is not loaded ( source ).

You can, however get the MAC address of an adapter which is not currently connected.

The WMI route is no good here, because it shows the MAC address as null for adapters which are not connected. The good news is that the NetworkInterface.GetAllNetworkInterfaces() route works just fine:

// using System.Net.NetworkInformation;
var nics = NetworkInterface.GetAllNetworkInterfaces();

// pick your NIC!
var selectedNic = nics.First();

var macAddress = selectedNic.GetPhysicalAddress().ToString();

Answer 2

You can use WMI:

public static string GetMACAddress()
    {
        ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
        ManagementObjectCollection moc = mc.GetInstances();
        string MACAddress=String.Empty;
        foreach(ManagementObject mo in moc)
        {
            if(MACAddress==String.Empty)  // only return MAC Address from first card
            {
                MACAddress= mo["MacAddress"].ToString() ;
            }
            mo.Dispose();
        }

        return MACAddress;
    }

Answer 3

Refer this link.

http://msdn.microsoft.com/en-us/library/system.net.networkinformation.physicaladdress.aspx

The example here displays physical address of all interface irrespective of their operational stage. HTH.