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。