http://jiezhi.cnblogs.com/archive/2005/07/13/192066.html（转）
using System;
using System.Diagnostics;
using System.Management;
using System.Net;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;
namespace MACAddress
{
/// <summary>
/// MainClass 的摘要描述。
/// </summary>
internal class MainClass
{
/// <summary>
/// 應用程式的主進入點。
/// </summary>
[STAThread]
private static void Main(string[] args)
{
GetMACByWMI();
IPAddress[] ips = GetLocalIP();
foreach (IPAddress ip in ips)
{
Console.WriteLine(GetMacByARP(ip.ToString()));
string mac = GetRemoteMacByNetBIOS(ip.ToString());
if ( mac.Length != 0 )
Console.WriteLine(mac);
else
Console.WriteLine("Fail to get MACAddress by NetBIOS");
GetMACBySNMP(ip.ToString(),"yourGroupName@yourVlanNumber");
}
Console.ReadLine();
}
By WMI
#region By ARP
[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);
public static string GetMacByARP(string clientIP)
{
string ip = clientIP;
Int32 ldest = inet_addr(ip);
Int64 macinfo = new Int64();
Int32 len = 6;
try
{
SendARP(ldest, 0, ref macinfo, ref len);
}
catch
{
return "";
}
string originalMACAddress = Convert.ToString(macinfo, 16);
if (originalMACAddress.Length < 12)
{
originalMACAddress = originalMACAddress.PadLeft(12, '0');
}
string macAddress;
if (originalMACAddress != "0000" && originalMACAddress.Length == 12)
{
string mac1, mac2, mac3, mac4, mac5, mac6;
mac1 = originalMACAddress.Substring(10, 2);
mac2 = originalMACAddress.Substring(8, 2);
mac3 = originalMACAddress.Substring(6, 2);
mac4 = originalMACAddress.Substring(4, 2);
mac5 = originalMACAddress.Substring(2, 2);
mac6 = originalMACAddress.Substring(0, 2);
macAddress = mac1 + "-" + mac2 + "-" + mac3 + "-" + mac4 + "-" + mac5 + "-" + mac6;
}
else
{
macAddress = "";
}
return macAddress.ToUpper();
}
public static IPAddress[] GetLocalIP()
{
string hostName = Dns.GetHostName();
IPHostEntry ipEntry = Dns.GetHostByName(hostName);
return ipEntry.AddressList;
}
#endregion
#region By NetBIOS
public static string GetRemoteMacByNetBIOS(string clientIP)
{
string ip = clientIP;
string dirResults = "";
ProcessStartInfo psi = new ProcessStartInfo();
Process proc = new Process();
psi.FileName = "nbtstat.exe";
//psi.RedirectStandardInput = false;
psi.RedirectStandardOutput = true;
psi.RedirectStandardError = true;
psi.Arguments = "-A " + ip;
psi.UseShellExecute = false;
proc = Process.Start(psi);
dirResults = proc.StandardOutput.ReadToEnd();
string error = proc.StandardError.ReadToEnd();
proc.WaitForExit();
dirResults = dirResults.Replace("/r", "").Replace("/n", "").Replace("/t", "");
Regex reg = new Regex("Mac[ ]{0,}Address[ ]{0,}=[ ]{0,}(?((.)*?))__MAC", RegexOptions.IgnoreCase | RegexOptions.Compiled);
Match mc = reg.Match(dirResults + "__MAC");
if (mc.Success)
{
return mc.Groups["key"].Value.ToUpper();
}
else
{
return "";
}
}
#endregion
#region By SNMP
public static void GetMACBySNMP(string ip,string vlan)
{
int commLength,mibLength,dataStart,dataLength;
string nextMib,value;
SNMP conn = new SNMP();
string mib = "1.3.6.1.2.1.17.4.3.1.1";
int orgMibLength = mib.Length;
byte[] response = new byte[1024];
nextMib = mib;
while ( true)
{
response = conn.Get("getnext",ip,vlan,nextMib);
commLength = Convert.ToInt16(response[6]);
mibLength = Convert.ToInt16(response[23+commLength]);
dataLength = Convert.ToInt16(response[25+commLength+mibLength]);
dataStart = 26 + commLength
１．使用WMI。查询表Win32_NetworkAdapterConfiguration即可获得。
２．使用ARP协议。请看这里。
３．使用Windows命令nbtstat，也就是通过NetBIOS。请看这里。
４．查询SNMP（就是一种用于监视网络设备的协议）的MIB（管理信息数据库）。但这不是一件简单的事情，需要自己创建SNMP包，发送到交换机，然后对返回的响应进行解析。
下面是代碼：
using System;using System.Diagnostics;using System.Management;using System.Net;using System.Runtime.InteropServices;using System.Text.RegularExpressions;namespace MACAddress{
/// <summary> /// MainClass 的摘要描述。 /// </summary> internal class MainClass { /// <summary> /// 應用程式的主進入點。 /// </summary> [STAThread] private static void Main(string[] args) { GetMACByWMI(); IPAddress[] ips = GetLocalIP(); foreach (IPAddress ip in ips) { Console.WriteLine(GetMacByARP(ip.ToString())); string mac = GetRemoteMacByNetBIOS(ip.ToString()); if ( mac.Length != 0 ) Console.WriteLine(mac); else Console.WriteLine("Fail to get MACAddress by NetBIOS"); GetMACBySNMP(ip.ToString(),"yourGroupName@yourVlanNumber"); } Console.ReadLine(); } By WMI #region By ARP [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); public static string GetMacByARP(string clientIP) { string ip = clientIP; Int32 ldest = inet_addr(ip); Int64 macinfo = new Int64(); Int32 len = 6; try { SendARP(ldest, 0, ref macinfo, ref len); } catch { return ""; } string originalMACAddress = Convert.ToString(macinfo, 16); if (originalMACAddress.Length < 12) { originalMACAddress = originalMACAddress.PadLeft(12, '0'); } string macAddress; if (originalMACAddress != "0000" && originalMACAddress.Length == 12) { string mac1, mac2, mac3, mac4, mac5, mac6; mac1 = originalMACAddress.Substring(10, 2); mac2 = originalMACAddress.Substring(8, 2); mac3 = originalMACAddress.Substring(6, 2); mac4 = originalMACAddress.Substring(4, 2); mac5 = originalMACAddress.Substring(2, 2); mac6 = originalMACAddress.Substring(0, 2); macAddress = mac1 + "-" + mac2 + "-" + mac3 + "-" + mac4 + "-" + mac5 + "-" + mac6; } else { macAddress = ""; } return macAddress.ToUpper(); } public static IPAddress[] GetLocalIP() { string hostName = Dns.GetHostName(); IPHostEntry ipEntry = Dns.GetHostByName(hostName); return ipEntry.AddressList; } #endregion #region By NetBIOS public static string GetRemoteMacByNetBIOS(string clientIP) { string ip = clientIP; string dirResults = ""; ProcessStartInfo psi = new ProcessStartInfo(); Process proc = new Process(); psi.FileName = "nbtstat.exe"; //psi.RedirectStandardInput = false; psi.RedirectStandardOutput = true; psi.RedirectStandardError = true; psi.Arguments = "-A " + ip; psi.UseShellExecute = false; proc = Process.Start(psi); dirResults = proc.StandardOutput.ReadToEnd(); string error = proc.StandardError.ReadToEnd(); proc.WaitForExit(); dirResults = dirResults.Replace("/r", "").Replace("/n", "").Replace("/t", ""); Regex reg = new Regex("Mac[ ]{0,}Address[ ]{0,}=[ ]{0,}(?((.)*?))__MAC", RegexOptions.IgnoreCase | RegexOptions.Compiled); Match mc = reg.Match(dirResults + "__MAC"); if (mc.Success) { return mc.Groups["key"].Value.ToUpper(); } else { return ""; } } #endregion #region By SNMP public static void GetMACBySNMP(string ip,string vlan) { int commLength,mibLength,dataStart,dataLength; string nextMib,value; SNMP conn = new SNMP(); string mib = "1.3.6.1.2.1.17.4.3.1.1"; int orgMibLength = mib.Length; byte[] response = new byte[1024]; nextMib = mib; while ( true) { response = conn.Get("getnext",ip,vlan,nextMib); commLength = Convert.ToInt16(response[6]); mibLength = Convert.ToInt16(response[23+commLength]); dataLength = Convert.ToInt16(response[25+commLength+mibLength]); dataStart = 26 + commLength