C# 获得局域网主机列表实例
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
using System.Threading;
namespace WindowLanSearch
{
///
/// Form1 的摘要说明。
///
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.Button button1;
private string[,] LanHost;
private System.Windows.Forms.ProgressBar progressBarSearch;
private Thread[] thread;
private System.Windows.Forms.ListView listView1;
private System.Windows.Forms.ColumnHeader columnHeader1;
private System.Windows.Forms.ColumnHeader columnHeader2;
private string str;
///
/// 必需的设计器变量。
///
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
InitLanHost();
progressBarSearch.Maximum = 255;
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
///
/// 数组初始化
///
private void InitLanHost()
{
LanHost = new string[255,2];
for (int i=0;i<255;i )
{
LanHost[i,0] = "";
LanHost[i,1] = "";
}
}
///
/// 清理所有正在使用的资源。
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
Windows 窗体设计器生成的代码
///
/// 应用程序的主入口点。
///
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e)
{
LanSearch();
}
///
/// 局域网搜索事件
///
private void LanSearch()
{
thread = new Thread[255];
ThreadStart threadMethod;
Thread threadProgress = new Thread(new ThreadStart(progressSearch));
threadProgress.Start();
string localhost = (Dns.GetHostByName(Dns.GetHostName())).AddressList[0].ToString(); //本地主机IP地址
str = localhost.Substring(0,localhost.LastIndexOf("."));
for (int i=0;i<255;i ) //建立255个线程扫描IP
{
threadMethod = new ThreadStart(LanSearchThreadMethod);
thread[i] = new Thread(threadMethod);
thread[i].Name = i.ToString();
thread[i].Start();
if (!thread[i].Join(100)) //Thread.Join(100)不知道这处这么用对不对,感觉没什么效果一样
{
thread[i].Abort();
}
}
GetLanHost();
listLanHost();
}
///
/// 多线程搜索方法
///
private void LanSearchThreadMethod()
{
int Currently_i = Convert.ToUInt16(Thread.CurrentThread.Name); //当前进程名称
IPAddress ScanIP = IPAddress.Parse( str "." Convert.ToString(Currently_i 1)); //获得扫描IP地址
IPHostEntry ScanHost = null;
ScanHost = Dns.GetHostByAddress(ScanIP); //获得扫描IP地址主机信息
if (ScanHost != null)
{
LanHost[Currently_i,0] = ScanIP.ToString();
LanHost[Currently_i,1] = ScanHost.HostName;
}
//progressBarSearch.Value = progressBarSearch.Value 1;
}
///
/// 文本框显示主机名与IP列表
///
private void GetLanHost()
{
for (int i=0;i<255;i )
if ( LanHost[i,0] !="")
{
textBox1.Text =textBox1.Text LanHost[i,1] ":" LanHost[i,0] "\r\n";
}
}
///
/// listview1 显示搜索主机
///
private void listLanHost()
{
listView1.View = View.List;
ListViewItem aa ;
for (int i=0;i<255;i )
{
if ( LanHost[i,0] !="")
{
aa= new ListViewItem();
aa.Text = LanHost[i,1];
aa.Tag = LanHost[i,0];
listView1.Items.Add(aa);
}
}
}
///
/// 进度条处理线程
///
private void progressSearch()
{
//label1.Text = "进度条只是时间估计,不是真实搜索进度!";
progressBarSearch.Value = 0;
for (int i=0;i<255;i )
{
progressBarSearch.Value = progressBarSearch.Value 1;
Thread.Sleep(100);
}
}
}
}
遗憾之处:因搜索较慢,没有实现真实的搜索进度。
不懂之处:实现文字提示时,当在鼠标事件首尾插入
private void button1_Click(object sender, System.EventArgs e)
{
lab1.Text = “开始搜索”; //新插入
LanSearch();
lab1.Text = “结束搜索”; //新插入
}
文本提示时,在lab1上始终不能及时显示,而是等所有线程结束后才显示“结束搜索“。
现在开始接触扫描远程计算机部分的代码。感觉c#在网络编程方面是简单而强大的,主要用namespace的System.Net和System.Net.Sockets,这两个namespace中包含丰富的类可以开发多种网络应用程序。
要使用这两个类,首先要加上对这两个类的引用:
using System.Net;
using System.Net.Sockets;而通过IP获得计算机名则是用以下语句:
IPAddress myIP=IPAddress.Parse(sIP);//把IP字符串通过Parse转换为IP地址实例
IPHostEntry myHost=Dns.GetHostByAddress(myIP);//用GetHostByAddress方法根据IP获得主机名
sHostName=myHost.HostName.ToString();//将计算机名传给我自己定放的字符串变量通过以上简单语句就能根据IP获得远程主机的计算机名。


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