【C#】C#获取客户端的MAC

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Net;
using System.Management;
using System.Runtime.InteropServices;

public partial class _Default : System.Web.UI.Page
{
    [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);

    private void Page_Load(object sender, System.EventArgs e)
    {
        try
        {
            string userip = Request.UserHostAddress;
            string strClientIP = Request.UserHostAddress.ToString().Trim();
            Int32 ldest = inet_addr(strClientIP); //目的地的ip
            Int32 lhost = inet_addr("");  //本地服务器的ip
            Int64 macinfo = new Int64();
            Int32 len = 6;
            int res = SendARP(ldest, 0, ref macinfo, ref len);
            string mac_src = macinfo.ToString("X");
            if (mac_src == "0")
            {
                if (userip == "127.0.0.1")
                    Response.Write("正在访问Localhost!");
                else
                    Response.Write("欢迎来自IP为" + userip + "的朋友！" + " <br>");
                //return;
            }

            while (mac_src.Length < 12)
            {
                mac_src = mac_src.Insert(0, "0");
            }

            string mac_dest = "";

            for (int i = 0; i < 11; i++)
            {
                if (0 == (i % 2))
                {
                    if (i == 10)
                    {
                        mac_dest = mac_dest.Insert(0, mac_src.Substring(i, 2));
                    }
                    else
                    {
                        mac_dest = "-" + mac_dest.Insert(0, mac_src.Substring(i, 2));
                    }
                }
            }

            Response.Write("欢迎来自IP为" + userip + " <br>" + ",MAC地址为" + mac_dest + "的朋友！"

            + " <br>");
        }
        catch (Exception err)
        {
            Response.Write(err.Message);
        }

    }
}

public class getIP
{
    [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);

    //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();
    }

    public static void Main(string[] args)
    {
        getIP gi = new getIP();
        Console.WriteLine("本地网卡信息:");
        Console.WriteLine(gi.getLocalIP() + " - " + gi.getLocalMac());

        Console.WriteLine("\n\r远程网卡信息:");
        string[] temp = gi.getRemoteIP("scmobile-tj2");
        for (int i = 0; i < temp.Length; i++)
        {
            Console.WriteLine(temp[i]);
        }
        Console.WriteLine(gi.getRemoteMac("192.168.0.3", "192.168.0.1"));
    }
}