form1.cs

C#编写的一个网段端口的扫描程序```值得刚学C#的朋友参考下

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net.Sockets;
using System.Net;
using System.Threading;
using System.IO;

namespace 扫描网段计算机端口
{
    public partial class Form1 : Form
    {
        string mask;
        IPAddress myIP;
        string ip;
        //private Thread scanThread;
        //decimal startIp;
        //decimal endIp;
        int i;
        int startIp;
        int endIp;
        int startport;
        //int endport;
        //private int port;
        Thread process;
        /*static AutoResetEvent Event1 = new AutoResetEvent(false);
        static AutoResetEvent Event2 = new AutoResetEvent(false);
        static AutoResetEvent Event3 = new AutoResetEvent(false);*/
        
       



        delegate void SetTextCallback(string text);
        private void SetTxt(string text)
        {
            if (this.listBox1.InvokeRequired)
            {
                SetTextCallback d = new SetTextCallback(SetTxt);
                this.Invoke(d, new Object[] { text });
            }
            else
            {
                this.listBox1.Items.Add(text); //将text的内容添加到listBox1
            }
        }

        public Form1()
        {
            InitializeComponent();
        }

        private void btn1_Click(object sender, EventArgs e)
        {
            
            process = new Thread(new ThreadStart(ipscan));
            process.Start();
            listBox1.Items.Clear();
            listBox1.Items.Add("端口扫描器　啊彬制作");
            listBox1.Items.Add(" ");

        }

        private void ipscan()
        {
            startIp = (int)num4.Value;
            endIp = (int)num5.Value;
            
            
                mask = num1.Value.ToString() + "." + num2.Value.ToString() + "." + num3.Value.ToString() + ".";
                for (i = startIp; i <= endIp; i++)
                {

                    ip = mask + i.ToString();

                    myIP = IPAddress.Parse(ip);
                    Thread t = new Thread(new ThreadStart(portscan));
                    t.Start();
                    System.Threading.Thread.Sleep(10);
                    /*if (process.ThreadState == ThreadState.Running)
                    {
                        process.Suspend();
                    }*/



                }



                //Event1.Set();
        }

        private void portscan()
        {
            /*AutoResetEvent[] evs = new AutoResetEvent[1];
            evs[0] = Event1;
            WaitHandle.WaitAll(evs);*/
            startport = Int32.Parse(textBox1.Text);
            //endport = Int32.Parse(textBox2.Text);
            //if ((startport >= 0 && startport <= 65536) && (endport >= 0 && endport <= 65536) && (startport <= endport))
            if (textBox1.Text != "")
            {
                SetTxt("开始扫描...(可能需要请您等待几分钟)");
                /*for (int i = startport; i <= endport; i++)
                 {
                     port = i;
                     //使用该端口的扫描线程
                     scanThread = new Thread(new ThreadStart(Scan));
                     scanThread.Start();
                     //使线程睡眠
                     System.Threading.Thread.Sleep(100);

                 }*/

                string portIP = ip;
                TcpClient objTCP = null;
                try
                {
                    
                    objTCP = new TcpClient(portIP, startport);
                    //SetTxt(portIP + "端口" + startport.ToString() + "开放!");
                    SetTxt("端口开放!");
                }
                catch
                {
                    //MessageBox.Show("!!!!!!");
                }
            }

            else
            {
                //MessageBox.Show("输入错误,端口范围为[0-65536]");
                MessageBox.Show("请输入要扫描的端口");
            }

            /*if (process.ThreadState == ThreadState.Suspended)
            {
                process.Resume();
            }*/
            //Event2.Set();

            //Event1.Reset();
        }

        /* private void Scan()
         {
             int portnow = port;
             //IPAddress portIP = myIP;
             string portIP = ip;
            
             //done[portnow] = true;
             //创建TcpClient 对象,TcpClient 用于为TCP网络服务提供客户端连接
             TcpClient objTCP = null;
             //扫描端口,成功写入信息
             try
             {
                 //用TcpClient对性扫描端口
                 objTCP = new TcpClient(portIP, portnow);
                 // lbResult.Items.Add("端口" + portnow.ToString() + "开放!");
                 SetTxt(ip+"端口" + portnow.ToString() + "开放!");
             }
             catch
             {
             }

             System.Threading.Thread.Sleep(10);
             //Event3.Set();
         }*/
    }
}