经测试下面方法获取Mac跨平台

        protected override void OnLoad(EventArgs e)

        {

            Response.Write(string.Join("<br/>", GetMacString()));

            Response.Write("<br/>");

            base.OnLoad(e);

        }

        public NetworkInterface[] NetCardInfo()

        {

            return NetworkInterface.GetAllNetworkInterfaces();

        }

        public string[] GetMacString()

        {

            string strMac = "";

            NetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces();

            foreach (NetworkInterface ni in interfaces)

            {

                if (ni.OperationalStatus == OperationalStatus.Up)

                {

                    strMac += ni.GetPhysicalAddress().ToString() + "|";

                }

            }

            return strMac.Split('|');

        }

相关文章:

C# C/S程序获取MAC地址三种方法   http://www.cnblogs.com/yzb305070/archive/2011/04/03/2004364.html

附:

/// <summary>

/// 获取当前请求的服务器IP，以及相应的MAC地址

/// </summary>

/// <returns>[当前请求的服务器IP,MAC地址]</returns>

public string[] GetRequestIPMAC()

{

        string[] result = new string[2];

        string serverName = Page.Request.ServerVariables["SERVER_NAME"];

        string requestServerIP = Page.Request.ServerVariables["LOCAL_ADDR"];

        if (serverName == "localhost")

        {

                result[0] = "localhost";

        }

        else

        {

                result[0] = requestServerIP.ToLower();

                ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");

                ManagementObjectCollection moc = mc.GetInstances();

                foreach (ManagementObject mo in moc)

                {

                        try

                        {

                                if ((bool)mo["IPEnabled"] == true)

                                {

                                        string[] IPAddresses = (string[])mo["IPAddress"];

                                        if (IPAddresses.Length > 0)

                                        {

                                                for (int i = 0; i < IPAddresses.Length; i++)

                                                {

                                                        if (IPAddresses[i] == requestServerIP)

                                                        {

                                                                result[1] = mo["MacAddress"].ToString().ToLower();

                                                                break;

                                                        }

                                                }

                                        }

                                        if (!String.IsNullOrEmpty(result[1]))

                                        {

                                                break;

                                        }

                                }

                        }

                        finally

                        {

                                mo.Dispose();

                        }

                }

        }

        return result;

}