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。

转自：http://www.cnblogs.com/jiezhi/articles/87412.html