c# 遍历局域网计算机（电脑）获取IP和计算机名称

c#可以遍历局域网计算机，获取全部计算机的名称和IP地址，网上提供了相关的几种方法，并对效率进行了比较，但是没有对各种方法进行比较，以确定可以使用的情况。这篇文章将对这几种方法进行分析，以帮助了解各种方法适用的情况。

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;
 using System.Net;
 using System.Net.NetworkInformation;
 using System.IO;
 using System.Collections;
 using System.Diagnostics;
 using System.DirectoryServices;
 using System.Management;

 namespace SocketTransferFile
 {
     /// <summary>
     ///
     /// </summary>
     public partial class Form1 : Form
     {
         //局域网计算机列表
         List<LocalMachine> machineList = new List<LocalMachine>();

         //Form构造函数
         public Form1()
         {
             InitializeComponent();
             InitData();
         }

         /// <summary>
         /// 初始化数据
         /// </summary>
         private void InitData()
         {
             lvLocalMachine.Items.Clear();
             machineList.Clear();

             //获取当前域的计算机列表
             label4.Text = DateTime.Now.ToString();
             GetAllLocalMachines();

             foreach (LocalMachine machine in machineList)
             {
                 ListViewItem item = new ListViewItem(new string[] { machine.Name, machine.IP });
                 lvLocalMachine.Items.Add(item);
             }
             label5.Text = DateTime.Now.ToString();

             //获取Active Directory中的计算机节点
             //label4.Text = DateTime.Now.ToString();
             //EnumComputers();
             //label5.Text = DateTime.Now.ToString();

             //获取指定IP范围内的计算机
             //label4.Text = DateTime.Now.ToString();
             //EnumComputersByPing();
             //label5.Text = DateTime.Now.ToString();
         }

         /// <summary>
         /// Handles the Click event of the button1 control.
         /// </summary>
         /// <param name="sender">The source of the event.</param>
         /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
         private void button1_Click(object sender, EventArgs e)
         {
             InitData();
         }

         /// <summary>
         /// 获取指定IP范围内的计算机
         /// </summary>
         private void EnumComputersByPing()
         {
             try
             {
                 for (int i = ; i <= ; i++)
                 {
                     Ping myPing;
                     myPing = new Ping();
                     myPing.PingCompleted += new PingCompletedEventHandler(_myPing_PingCompleted);

                     string pingIP = "192.168.1." + i.ToString();
                     myPing.SendAsync(pingIP, , null);
                 }
             }
             catch
             {
             }
         }

         /// <summary>
         /// Handles the PingCompleted event of the _myPing control.
         /// </summary>
         /// <param name="sender">The source of the event.</param>
         /// <param name="e">The <see cref="System.Net.NetworkInformation.PingCompletedEventArgs"/> instance containing the event data.</param>
         private void _myPing_PingCompleted(object sender, PingCompletedEventArgs e)
         {
             if (e.Reply.Status == IPStatus.Success)
             {
                 LocalMachine localMachine = new LocalMachine();
                 localMachine.IP = e.Reply.Address.ToString();
                 //localMachine.Name = Dns.GetHostByAddress(IPAddress.Parse(e.Reply.Address.ToString())).HostName;
                 localMachine.Name = Dns.Resolve(e.Reply.Address.ToString()).HostName;

                 ListViewItem item = new ListViewItem(new string[] { localMachine.Name, localMachine.IP });
                 lvLocalMachine.Items.Add(item);
             }
         }

         /// <summary>
         /// 获取Active Directory中的计算机节点
         /// </summary>
         private void EnumComputers()
         {
             using (DirectoryEntry root = new DirectoryEntry("WinNT:"))
             {
                 foreach (DirectoryEntry domain in root.Children)
                 {
                     foreach (DirectoryEntry computer in domain.Children)
                     {
                         if (computer.Name == "Schema")
                         {
                             continue;
                         }

                         try
                         {
                             LocalMachine localMachine = new LocalMachine();
                             localMachine.IP = Dns.GetHostEntry(computer.Name).AddressList[].ToString();
                             localMachine.Name = computer.Name;

                             ListViewItem item = new ListViewItem(new string[] { localMachine.Name, localMachine.IP });
                             lvLocalMachine.Items.Add(item);
                         }
                         catch
                         {

                         }
                     }
                 }
             }
         }

         /// <summary>
         /// 获取当前域的计算机列表
         /// </summary>
         /// <returns></returns>
         private void GetAllLocalMachines()
         {
             Process p = new Process();
             p.StartInfo.FileName = "net";
             p.StartInfo.Arguments = "view";
             p.StartInfo.UseShellExecute = false;
             p.StartInfo.RedirectStandardInput = true;
             p.StartInfo.RedirectStandardOutput = true;
             p.StartInfo.RedirectStandardError = true;
             p.StartInfo.CreateNoWindow = true;
             p.Start();
             p.StandardInput.WriteLine("exit");

             StreamReader reader = p.StandardOutput;

             for (string line = reader.ReadLine(); line != null; line = reader.ReadLine())
             {
                 line = line.Trim();
                 if (line.StartsWith(@"\\"))
                 {
                     string name = line.Substring().Trim();

                     //如果有路由器，会列出路由器，但是获取不到IP地址，会报错
                     try
                     {
                         LocalMachine localMachine = new LocalMachine();

                         localMachine.IP = Dns.GetHostEntry(name).AddressList[].ToString();
                         localMachine.Name = name;

                         machineList.Add(localMachine);
                     }
                     catch
                     {
                     }
                 }
             }
         }
     }

 public class LocalMachine
 {
     public string IP { get; set; }
     public string Name { get; set; }
 }
 }

http://blog.bossma.cn/dotnet/csharp_winform_lan_get_ip_and_computername/