1using System;
  2using System.Collections.Generic;
  3using System.ComponentModel;
  4using System.Data;
  5using System.Drawing;
  6using System.Text;
  7using System.Windows.Forms;
  8using System.Threading;
  9using System.Net;
 10using System.Net.Sockets;
 11
 12namespace Scan
 13{
 14    public partial class Main : Form
 15    {
 16        //主线程
 17        private Thread tdm;
 18        //开始端口，结束端口
 19        int Start, End;
 20       //线程数
 21        private int count=0;
 22        //当前扫描端口
 23        private int i;
 24        public Main()
 25        {
 26            InitializeComponent();
 27        }
 28        /**//// <summary>
 29        /// 副线程
 30        /// </summary>
 31     private void Process()
 32        {
 33         //当前要扫描的ＩＰ地址
 34            string IP;
 35        
 36            IP = mkIP.Text;
 37
 38                TcpClient tc = new TcpClient();
 39                tc.SendTimeout = tc.ReceiveTimeout = 20000;
 40
 41                try
 42                {
 43                    //建立连接
 44                    tc.Connect(IP, i);
 45                    //判断是否连接成功
 46                    if (tc.Connected)
 47                    {
 48                        tbDetail.Text = tbDetail.Text + "端口" + i.ToString() + "开放。\r\n";
 49                    }
 50                   
 51                }
 52                catch (Exception ex)
 53                {
 54                   
 55                }
 56                finally
 57                {
 58  tc.Close();
 59                    tc = null;
 60                    //修改线程数
 61                    count--;
 62//写入进度  
 63 pbProcess.Value = Convert.ToInt32((Convert.ToDouble(i) / Convert.ToDouble(End)) * 100);
 64                }
 65               
 66            
 67           
 68        }
 69
 70        private void button1_Click(object sender, EventArgs e)
 71        {
 72            Thread tmain = new Thread(new ThreadStart(MainProcess));
 73            tmain.Start();
 74           
 75        }
 76        //主线程
 77        private void MainProcess()
 78        {
 79            count = 0;
 80            pbProcess.Value = 0;
 81            tbDetail.Text = "";
 82 Start = Convert.ToInt32(tbStar.Text);
 83            End = Convert.ToInt32(tbEnd.Text);
 84            //循环取副线程扫描端口
 85            for (i = Start; i < End; i++)
 86            {
 87                count++;
 88               
 89                tdm = new Thread(new ThreadStart(Process));
 90                tdm.Start();
 91                Thread.Sleep(10);
 92                //线程数控制在２０
 93                while (count > 20) ;
 94            }
 95           while (count>0) ;
 96            tbDetail.Text = tbDetail.Text+"扫描完成";
 97        }
 98        private void Main_Load(object sender, EventArgs e)
 99        {
100            Control.CheckForIllegalCrossThreadCalls = false;
101        }
102
103       
104    }
105   
106}