public class getIP

    {

        [DllImport("Iphlpapi.dll")] //操作系统自带

        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);

        //获取本机的IP

        public string getLocalIP()

        {

            string strHostName = Dns.GetHostName();  //得到本机的主机名

            IPHostEntry ipEntry = Dns.GetHostByName(strHostName); //取得本机IP

            string strAddr = ipEntry.AddressList[0].ToString();

            return (strAddr);

        }

        //获取本机的MAC

        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);

        }

        //获取远程主机IP

        public string[] getRemoteIP(string RemoteHostName)

        {

            IPHostEntry ipEntry = Dns.GetHostByName(RemoteHostName);

            IPAddress[] IpAddr = ipEntry.AddressList;

            string[] strAddr = new string[IpAddr.Length];

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

            {

                strAddr[i] = IpAddr[i].ToString();

            }

            return (strAddr);

        }

        //获取远程主机MAC

        public string getRemoteMac(string localIP, string remoteIP)

        {

            Int32 ldest = inet_addr(remoteIP); //目的ip

            Int32 lhost = inet_addr(localIP); //本地ip

            try

            {

                Int64 macinfo = new Int64();

                Int32 len = 6;

                int res = SendARP(ldest, 0, ref macinfo, ref len);

                return Convert.ToString(macinfo, 16);

            }

            catch (Exception err)

            {

                Console.WriteLine("Error:{0}", err.Message);

            }

            return 0.ToString();

        }

    }

}