c#端口掃描器源代碼

老師要求寫的一個端口掃描器

圖:

 

源代碼:

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

namespace scanports
...{
    /**//// <summary>
    /// Form1 的摘要說明。
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    ...{
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.TextBox txtip;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.TextBox txtmin;
        private System.Windows.Forms.TextBox txtmax;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.ListBox lisstatus;
        private System.Windows.Forms.Button btnexit;
        private System.Windows.Forms.Button btnscan;
        private System.Windows.Forms.Button btnpause;
        private System.Windows.Forms.Button btncontinnue;
        //定義一個線程
        private Thread t;
        /**//// <summary>
        /// 必需的設計器變量。
        /// </summary>
        private System.ComponentModel.Container components = null;

        public Form1()
        ...{
            //
            // Windows 窗體設計器支持所必需的
            //
            InitializeComponent();

            //
            // TODO: 在 InitializeComponent 調用後添加任何構造函數代碼
            //
        }

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

        Windows 窗體設計器生成的代碼#region Windows 窗體設計器生成的代碼
        /**//// <summary>
        /// 設計器支持所需的方法 - 不要使用代碼編輯器修改
        /// 此方法的內容。
        /// </summary>
        private void InitializeComponent()
        ...{
            this.label1 = new System.Windows.Forms.Label();
            this.txtip = new System.Windows.Forms.TextBox();
            this.btnscan = new System.Windows.Forms.Button();
            this.lisstatus = new System.Windows.Forms.ListBox();
            this.label2 = new System.Windows.Forms.Label();
            this.txtmin = new System.Windows.Forms.TextBox();
            this.txtmax = new System.Windows.Forms.TextBox();
            this.label3 = new System.Windows.Forms.Label();
            this.btnexit = new System.Windows.Forms.Button();
            this.btnpause = new System.Windows.Forms.Button();
            this.btncontinnue = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // label1
        &nbs// 
            this.label1.Location = new System.Drawing.Point(8, 24);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(56, 16);
            this.label1.TabIndex = 0;
            this.label1.Text = "機器IP";
            // 
            // txtip
            // 
            this.txtip.Location = new System.Drawing.Point(56, 16);
            this.txtip.Name = "txtip";
            this.txtip.Size = new System.Drawing.Size(128, 21);
            this.txtip.TabIndex = 1;
            this.txtip.Text = "";
            // 
            // btnscan
            // 
            this.btnscan.Location = new System.Drawing.Point(192, 16);
            this.btnscan.Name = "btnscan";
            this.btnscan.TabIndex = 2;
            this.btnscan.Text = "掃描";
            this.btnscan.Click += new System.EventHandler(this.btnscan_Click);
            // 
            // lisstatus
            // 
            this.lisstatus.ItemHeight = 12;
            this.lisstatus.Location = new System.Drawing.Point(8, 112);
            this.lisstatus.Name = "lisstatus";
   this.lisstatus.ScrollAlwaysVisible = true;
            this.lisstatus.Size = new System.Drawing.Size(256, 232);
            this.lisstatus.TabIndex = 3;
            // 
            // label2
            // 
            this.label2.Location = new System.Drawing.Point(16, 48);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(56, 16);
            this.label2.TabIndex = 4;
            this.label2.Text = "端口范圍";
            // 
            // txtmin
            // 
            this.txtmin.Location = new System.Drawing.Point(80, 48);
            this.txtmin.Name = "txtmin";
            this.txtmin.Size = new System.Drawing.Size(32, 21);
            this.txtmin.TabIndex = 5;
            this.txtmin.Text = "";
            // 
            // txtmax
            // 
            this.txtmax.Location = new System.Drawing.Point(152, 48);
            this.txtmax.Name = "txtmax";
            this.txtmax.Size = new System.Drawing.Size(32, 21);
            this.txtmax.TabIndex = 6;
            this.txtmax.Text = "";
            // 
&nbs         // label3
            // 
            this.label3.Location = new System.Drawing.Point(120, 48);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(16, 16);
            this.label3.TabIndex = 7;
            this.label3.Text = "到";
            // 
            // btnexit
            // 
            this.btnexit.Location = new System.Drawing.Point(192, 48);
            this.btnexit.Name = "btnexit";
            this.btnexit.TabIndex = 8;
            this.btnexit.Text = "退出";
            this.btnexit.Click += new System.EventHandler(this.btnexit_Click);
            // 
            // btnpause
            // 
            this.btnpause.Enabled = false;
            this.btnpause.Location = new System.Drawing.Point(16, 80);
            this.btnpause.Name = "btnpause";
            this.btnpause.TabIndex = 9;
            this.btnpause.Text = "暫停";
            this.btnpause.Click += new System.EventHandler(this.btnpause_Click);
            // 
            // btncontinnue
            // 
            this.btncontinnue.Enabled = false;
     this.btncontinnue.Location = new System.Drawing.Point(112, 80);
            this.btncontinnue.Name = "btncontinnue";
            this.btncontinnue.TabIndex = 10;
            this.btncontinnue.Text = "繼續";
            this.btncontinnue.Click += new System.EventHandler(this.btncontinnue_Click);
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClIEntSize = new System.Drawing.Size(280, 350);
            this.Controls.Add(this.btncontinnue);
            this.Controls.Add(this.btnpause);
            this.Controls.Add(this.btnexit);
            this.Controls.Add(this.label3);
            this.Controls.Add(this.txtmax);
            this.Controls.Add(this.txtmin);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.lisstatus);
            this.Controls.Add(this.btnscan);
            this.Controls.Add(this.txtip);
            this.Controls.Add(this.label1);
            this.Name = "Form1";
            this.Text = "端口掃描器";
            this.ResumeLayout(false);

        }
        #endregion

        /**//// <summary>
        /// 應用程序的主入口點。
        /// </summary>
        [STAThread]
        static void Main() 
        ...{
            Application.Run(new Form1());
        }

        private void btnscan_Click(object sender, System.EventArgs e)
        ...{
            //清空列表
            lisstatus.Items.Clear();
            //相應的按鈕的顯示與關閉
            btnpause.Enabled=true;
            btnscan.Enabled=false;
            this.txtip.Enabled=false;
            this.txtmax.Enabled=false;
            this.txtmin.Enabled=false;
            //調用線程
             t=new Thread(new ThreadStart(scanport));
            t.Start();
        }
        void scanport()
        ...{
            try
            ...{
                TcpClient client=new TcpClIEnt();
                IPAddress address=IPAddress.Parse(txtip.Text);
                for(int i=int.Parse(txtmin.Text);i<=int.Parse(txtmax.Text);i++)
                ...{
                    try
                    ...{
                        //掃描制定的端口范圍
                        clIEnt.Connect(address,i);
                        lisstatus.Items.Add("端口"+i+"是打開的");
                    }
                    catch(SocketException)
                    ...{
                        lisstatus.Items.Add("端口"+i+"是關閉的");
                    }
                }
            }
            catch(Exception ex)
            ...{
                MessageBox.Show(ex.Message);
            }
            finally
            ...{
                //設置按鈕的狀態
                btnscan.Enabled=true;
                this.txtip.Enabled=true;
                this.txtmax.Enabled=true;
                this.txtmin.Enabled=true;
      }
            
        }

        private void btnexit_Click(object sender, System.EventArgs e)
        ...{
            //關閉線程,並退出
            t.Abort();
            this.Close();
        }

        private void btnpause_Click(object sender, System.EventArgs e)
        ...{
            //暫停線程
            btnpause.Enabled=false;
            t.Suspend();
            btncontinnue.Enabled=true;
        }

        private void btncontinnue_Click(object sender, System.EventArgs e)
        ...{
            //繼續線程
           &nbsp;btncontinnue.Enabled=false;
            t.Resume();
            btnpause.Enabled=true;
        }
    }
}