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}