.net c# 获取电脑网卡MAC地址

第1种:

通过 ManagementObjectSearcher 类,进行查看系统相关信息

然后提取MAC地址．

        /// <summary>
        /// 获取本机的MAC;
        /// </summary>
        public string GetLocalMac()
        {
            string mac = null;
            ManagementObjectSearcher query = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection queryCollection = query.Get();
            foreach (ManagementObject mo in queryCollection)
            {
                if (mo["IPEnabled"].ToString() == "True")
                    mac = mo["MacAddress"].ToString();
            }
            return (mac);
        }

第2种:

通过NetworkInterface 接口获取接口信息,提取MAC地址

        public string MacAdd()
        {
            try
            {
                string mac = "";
                foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
                {
                    if (nic.OperationalStatus == OperationalStatus.Up) { mac += nic.GetPhysicalAddress().ToString().Trim(); break; }
                }
                if (!Model.Helper.CheckNull(mac)) { if (mac.Length < 3) { mac = null; } }
                return mac;
            }
            catch (Exception) { return null; }
        }

第3种:

获取同一个IP下的MAC地址信息

        //只能获取同网段的远程主机MAC地址. 因为在标准网络协议下，ARP包是不能跨网段传输的，故想通过ARP协议是无法查询跨网段设备MAC地址的。
        [DllImport("Iphlpapi.dll")]
        private static extern int SendARP(Int32 dest, Int32 host, ref Int64 mac, ref Int32 length);
        [DllImport("Ws2_32.dll")]
        private static extern Int32 inet_addr(string ip);
        /// <summary>
        /// 获取ip对应的MAC地址
        /// </summary>
        public string GetMacAddress(string ip)
        {
            Int32 ldest = inet_addr(ip);            //目的ip 
            Int32 lhost = inet_addr("127.0.0.1");   //本地ip 

            try
            {
                Int64 macinfo = new Int64();
                Int32 len = 6;
                int res = SendARP(ldest, 0, ref macinfo, ref len);  //使用系统API接口发送ARP请求，解析ip对应的Mac地址
                return Convert.ToString(macinfo, 16);
            }
            catch (Exception err)
            {
                Console.WriteLine("Error:{0}", err.Message);
            }
            return "获取Mac地址失败";
        }

运行结果: