获得局域网中计算机的列表（包括计算机名，IP和MAC）的方法
有的时候需要根据MAC来限定登录的计算机，为此查找了不少资料（有来自博客堂和CSDN），下面是获得远程计算机的MAC和局域网中计算机列表的方法。
需要引用的命名空间
using System; using System.Collections; using System.Diagnostics; using System.Management; using System.Net; using System.DirectoryServices; using System.Runtime.InteropServices; using System.Text.RegularExpressions;
获得本机的MAC地址
public static string GetLocalMac() 
{ 
string strMac = string.Empty; ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration"); ManagementObjectCollection moc = mc.GetInstances(); foreach(ManagementObject mo in moc) 
{ 
if ((bool)mo["IPEnabled"] == true) strMac += mo["MacAddress"].ToString() ; 
} return strMac.ToUpper(); 
}
获得远程计算机的MAC地址
方法一：使用API，利用ARP协议，只能获得同网段计算机的MAC
[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 GetRemoteMac(string clientIP) { string ip = clientIP; if ( ip == "127.0.0.1") ip = GetLocalIP()[0]; 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(); } 方法二：使用windows的命令nbtstat
public static string GetRemoteMacByNetBIOS(string clientIP) { string ip = clientIP; if ( ip == "127.0.0.1") ip = GetLocalIP()[0]; 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 ""; } } 使用此方法需要足够的操作系统的权限。在Web中,可以将ASP.net用户加入管理员组。
对于上面两个地方都用到的GetLocalIP是一个获取本机IP的方法：
public static string[] GetLocalIP() { string hostName = Dns.GetHostName(); IPHostEntry ipEntry=Dns.GetHostByName(hostName); IPAddress[] arr=ipEntry.AddressList; string[] result = new string[arr.Length]; for(int i=0;i { result[i] = arr[i].ToString(); } return result; } 获得局域网内计算机的列表
方法一：使用逐个IP地址扫描的方式
利用多线程来对每个IP逐个扫描。
ComputerAddressInfo cai = new ComputerAddressInfo("192.168.1",42,53); Thread thScan = new Thread(new ThreadStart(cai.ScanComputers)); thScan.Start(); //
public class ComputerAddressInfo { private int startIP = 0; private int endIP = 0; private string ipPrefix = ""; private ArrayList computerList = null; public ComputerAddressInfo(string ipPrefix,int startIP,int endIP) { this.startIP = startIP; this.endIP = endIP; this.ipPrefix = ipPrefix; computerList = new ArrayList(); } public void ScanComputers() { for(int i=startIP;i<=endIP;i++) { string scanIP = ipPrefix +"."+i.ToString(); IPAddress myScanIP = IPAddress.Parse(scanIP); IPHostEntry myScanHost = null; string[] arr = new string[2]; try { myScanHost = Dns.GetHostByAddress(myScanIP); } catch { continue; } if (myScanHost != null) { arr[0] = myScanHost.HostName; arr[1] = scanIP; computerList.Add(arr); } } } } 此方法速度比较慢。
方法二：使用Active Directory
public static ArrayList GetComputerList() { ArrayList list = new ArrayList(); //or use "WinNT://your_domain_name" DirectoryEntry root = new DirectoryEntry("WinNT:"); DirectoryEntries domains = root.Children; domains.SchemaFilter.Add("domain"); foreach (DirectoryEntry domain in domains) { DirectoryEntries computers = domain.Children; computers.SchemaFilter.Add("computer"); foreach (DirectoryEntry computer in computers) { object[] arr = new string[3]; IPHostEntry iphe = null; try { iphe = Dns.GetHostByName(computer.Name); } catch { continue; } arr[0] = domain.Name; arr[1] = computer.Name; if ( iphe != null && iphe.AddressList.Length >0 ) { for ( int i=0;i arr[2] += iphe.AddressList[i].ToString()+","; arr[2] = arr[2].ToString().Remove(arr[2].ToString().Length-1,1); } else arr[2] = ""; list.Add(arr); } } return list; } 此方法速度也比较慢。
后记
上面两个获得局域网内的计算机列表的方法都很费时，目前还没有找到更好的办法。
