C＃查本机地址和网段扫描（Codesource)

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Net;
using System.Threading;

namespace WindowsApplication1
{
 /// <summary>
 /// Form1 的摘要说明。
 /// </summary>
 public class Form1 : System.Windows.Forms.Form
 {
  private System.Windows.Forms.Button button1;
  private System.Windows.Forms.Button button2;
  private System.Windows.Forms.Button button3;
  private System.Windows.Forms.TextBox textBox1;
  private System.Windows.Forms.TextBox textBox2;
  private System.Windows.Forms.Label label1;
  private System.Windows.Forms.TextBox textBox3;
  private System.Windows.Forms.TextBox textBox4;
  private System.Windows.Forms.TextBox textBox5;
  /// <summary>
  /// 必需的设计器变量。
  /// </summary>
  private System.ComponentModel.Container components = null;

  public Form1()
  {
   //
   // Windows 窗体设计器支持所必需的
   //
   InitializeComponent();

   //
   // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
   //
  }

  /// <summary>
  /// 清理所有正在使用的资源。
  /// </summary>
  protected override void Dispose( bool disposing )
  {
   if( disposing )
   {
    if(components != null)
    {
     components.Dispose();
    }
   }
   base.Dispose( disposing );
  }

  public static void Main()
  {
   Application.Run(new Form1());
  }
  #region Windows 窗体设计器生成的代码
  /// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {
   this.button1 = new System.Windows.Forms.Button();
   this.button2 = new System.Windows.Forms.Button();
   this.button3 = new System.Windows.Forms.Button();
   this.textBox1 = new System.Windows.Forms.TextBox();
   this.textBox2 = new System.Windows.Forms.TextBox();
   this.label1 = new System.Windows.Forms.Label();
   this.textBox3 = new System.Windows.Forms.TextBox();
   this.textBox4 = new System.Windows.Forms.TextBox();
   this.textBox5 = new System.Windows.Forms.TextBox();
   this.SuspendLayout();
   //
   // button1
   //
   this.button1.Location = new System.Drawing.Point(40, 272);
   this.button1.Name = "button1";
   this.button1.Size = new System.Drawing.Size(104, 32);
   this.button1.TabIndex = 0;
   this.button1.Text = "button1";
   this.button1.Click += new System.EventHandler(this.button1_Click);
   //
   // button2
   //
   this.button2.Location = new System.Drawing.Point(264, 272);
   this.button2.Name = "button2";
   this.button2.Size = new System.Drawing.Size(104, 32);
   this.button2.TabIndex = 1;
   this.button2.Text = "button2";
   this.button2.Click += new System.EventHandler(this.button2_Click);
   //
   // button3
   //
   this.button3.Location = new System.Drawing.Point(480, 272);
   this.button3.Name = "button3";
   this.button3.Size = new System.Drawing.Size(104, 32);
   this.button3.TabIndex = 2;
   this.button3.Text = "button3";
   this.button3.Click += new System.EventHandler(this.button3_Click);
   //
   // textBox1
   //
   this.textBox1.Location = new System.Drawing.Point(40, 88);
   this.textBox1.Multiline = true;
   this.textBox1.Name = "textBox1";
   this.textBox1.Size = new System.Drawing.Size(544, 64);
   this.textBox1.TabIndex = 3;
   this.textBox1.Text = "";
   //
   // textBox2
   //
   this.textBox2.Location = new System.Drawing.Point(40, 184);
   this.textBox2.Multiline = true;
   this.textBox2.Name = "textBox2";
   this.textBox2.Size = new System.Drawing.Size(544, 56);
   this.textBox2.TabIndex = 4;
   this.textBox2.Text = "";
   //
   // label1
   //
   this.label1.Location = new System.Drawing.Point(40, 24);
   this.label1.Name = "label1";
   this.label1.Size = new System.Drawing.Size(120, 24);
   this.label1.TabIndex = 5;
   this.label1.Text = "label1";
   //
   // textBox3
   //
   this.textBox3.Location = new System.Drawing.Point(256, 16);
   this.textBox3.Name = "textBox3";
   this.textBox3.Size = new System.Drawing.Size(176, 21);
   this.textBox3.TabIndex = 6;
   this.textBox3.Text = "textBox3";
   //
   // textBox4
   //
   this.textBox4.Location = new System.Drawing.Point(256, 56);
   this.textBox4.Name = "textBox4";
   this.textBox4.Size = new System.Drawing.Size(176, 21);
   this.textBox4.TabIndex = 7;
   this.textBox4.Text = "textBox4";
   //
   // textBox5
   //
   this.textBox5.Location = new System.Drawing.Point(464, 56);
   this.textBox5.Name = "textBox5";
   this.textBox5.Size = new System.Drawing.Size(152, 21);
   this.textBox5.TabIndex = 8;
   this.textBox5.Text = "textBox5";
   //
   // Form1
   //
   this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
   this.ClientSize = new System.Drawing.Size(648, 350);
   this.Controls.Add(this.textBox5);
   this.Controls.Add(this.textBox4);
   this.Controls.Add(this.textBox3);
   this.Controls.Add(this.label1);
   this.Controls.Add(this.textBox2);
   this.Controls.Add(this.textBox1);
   this.Controls.Add(this.button3);
   this.Controls.Add(this.button2);
   this.Controls.Add(this.button1);
   this.Name = "Form1";
   this.Text = "Form1";
   this.Load += new System.EventHandler(this.Form1_Load);
   this.ResumeLayout(false);

  }
  #endregion

  private void Form1_Load(object sender, System.EventArgs e)
  {
  
  }
  private void button1_Click(object sender, System.EventArgs e)
  {
   IPHostEntry myHost = new IPHostEntry();
   try
   {
    myHost = Dns.GetHostByName(Dns.GetHostName());
    //显示本地主机名
    this.textBox2.AppendText(myHost.HostName.ToString());
    //显示本地主机的IP地址表
    for(int i=0; i < myHost.AddressList.Length; i++)
    {
     this.textBox2.AppendText("本地主机IP地址->" + myHost.AddressList[i].ToString() + "\r\n");
     textBox2.Refresh();
    }
   }
   catch(Exception error)
   {
    MessageBox.Show(error.Message);
   }
  }

  private void button2_Click(object sender, System.EventArgs e)
  {
   IPHostEntry myDnsToIP = new IPHostEntry();
   myDnsToIP = Dns.Resolve(this.textBox1.Text);
   //显示此域名的IP地址的列表
   for(int i = 0; i < myDnsToIP.AddressList.Length; i++)
   {
    this.textBox2.AppendText(this.textBox1.Text + "的IP地址是" + myDnsToIP.AddressList[i].ToString() + "\r\n");
   }
  }

  private void button3_Click(object sender, System.EventArgs e)
  {
   Thread thScan = new Thread(new ThreadStart(ScanTarget));
   thScan.Name="ThreadTest";
   thScan.Start();
  }

  private void ScanTarget()
  {
   this.button3.Enabled = false;
   this.label1.Text = "0";

   string strIPAddress = textBox3.Text.ToString();
   //开始扫描地址
   int nStrat = Int32.Parse(textBox4.Text);
   //终止扫描地址
   int nEnd = Int32.Parse(textBox5.Text);
   //扫描的操作
   for(int i = nStrat; i <= nEnd; i++)
   {
    string strScanIPAdd = strIPAddress + "."+i.ToString();
    this.label1.Text = i.ToString();
    //转换成IP地址
    IPAddress myScanIP = IPAddress.Parse(strScanIPAdd);
    try
    {
     //你可以加入自已的,增强功能
     // Dns.GetHostByAddress 方法: 根据 IP 地
     //址获取 DNS 主机信息。
     IPHostEntry myScanHost = Dns.GetHostByAddress(myScanIP);
     //获取主机的名
     string strHostName = myScanHost.HostName.ToString();
     this.textBox2.AppendText(strScanIPAdd + " -> " + strHostName + "\r\n");
    }
    catch(Exception error)
    {
     MessageBox.Show(error.Message);
    }
   }

   this.button3.Enabled = true;
  }

 }
}

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