目录

• 实践过程
• 效果
• 代码

实践过程

效果

代码

public partial class Form : Form
{
    public Form()
    {
        InitializeComponent();
    }

    #region 实例化类对象及公共变量
    private Thread myThread;
    string StartIPAddress = "";
    string EndIPAddress = "";
    int intStrat =;                          //开始扫描地址
    int intEnd =;                           //终止扫描地址
    string strIP = "";
    string strflag = "";                      //扫描到的IP地址
    #endregion

    private void button_Click(object sender, EventArgs e)
    {
        try
        {
            if (button.Text == "开始")
            { 
                listView.Items.Clear();            //清空ListView控件中的项
                textBox.Enabled = textBox2.Enabled = false;
                strIP = "";
                strflag = textBox.Text;
                StartIPAddress = textBox.Text;
                EndIPAddress = textBox.Text;
                //开始扫描地址
                intStrat = Int.Parse(StartIPAddress.Substring(StartIPAddress.LastIndexOf(".") + 1));
                //终止扫描地址
                intEnd = Int.Parse(EndIPAddress.Substring(EndIPAddress.LastIndexOf(".") + 1));
                //指定进度条最大值
                progressBar.Minimum = intStrat;
                //指定进度条最小值
                progressBar.Maximum = intEnd;
                //指定进度条初始值
                progressBar.Value = progressBar1.Minimum;
                timer.Start();             //开始运行计时器
                button.Text = "停止";      //设置按钮文本为停止
                //使用自定义方法StartScan实例化线程对象
                myThread = new Thread(new ThreadStart(this.StartScan));
                myThread.Start();                           //开始运行扫描IP的线程
            }
            else
            {
                textBox.Enabled = textBox2.Enabled = true;
                button.Text = "开始";      //设置按钮文本为开始
                timer.Stop();              //停止运行计时器
                //设置进度条的值为最大值
                progressBar.Value = intEnd;
                if (myThread != null)       //判断线程对象是否为空
                {
                    //判断扫描IP地址的线程是否正在运行
                    if (myThread.ThreadState == ThreadState.Running)
                    {
                        myThread.Abort();   //终止线程
                    }
                }
            }
        }
        catch { }
    }

    private void timer_Tick(object sender, EventArgs e)
    {
        if (strIP != "")                           //判读是否有可用IP地址
        {
            if (strIP.IndexOf(',') == -)
            {
                if (listView.Items.Count > 0)
                {
                    for (int i =; i < listView1.Items.Count; i++)
                    {
                        //判断扫描到的IP地址是否与列表中的重复
                        if (listView.Items[i].Text != strIP)
                        {
                            //向列表中添加扫描到的已用IP地址
                            listView.Items.Add(strIP);
                        }
                    }
                }
                else
                    //向列表汇总添加扫描到的已用IP地址
                    listView.Items.Add(strIP);
            }
            else
            {
                string[] strIPS = strIP.Split(',');
                for (int i =; i < strIPS.Length; i++)
                {
                    listView.Items.Add(strIPS[i].ToString());
                }
            }
            strIP = "";
        }
        for (int i =; i < listView1.Items.Count; i++)
            listView.Items[i].ImageIndex = 0;
        if (progressBar.Value < progressBar1.Maximum)  //判断进度条的当前值是否超出其最大值
            progressBar.Value = Int32.Parse(strflag.Substring(strflag.LastIndexOf(".") + 1));                    //将进度条的值加1
        if (strflag == textBox.Text)  //判断正在扫描的IP地址是否是结束IP地址
        {
            timer.Stop();                              //停止运行计时器
            textBox.Enabled = textBox2.Enabled = true;
            button.Text = "开始";                      //设置按钮文本为扫描
            MessageBox.Show("IP地址扫描结束！");
        }
    }

    private void Form_FormClosed(object sender, FormClosedEventArgs e)
    {
        if (myThread != null)               //判断线程对象是否为空
        {
            //判断扫描IP地址的线程是否正在运行
            if (myThread.ThreadState == ThreadState.Running)
            {
                myThread.Abort();           //终止线程
            }
        }
    }

    #region 扫描局域网IP地址
    /// <summary>
    /// 扫描局域网IP地址
    /// </summary>
    private void StartScan()
    {
        //扫描的操作
        for (int i = intStrat; i <= intEnd; i++)
        {
            string strScanIP = StartIPAddress.Substring(, StartIPAddress.LastIndexOf(".") + 1) + i.ToString();
            //转换成IP地址
            IPAddress myScanIP = IPAddress.Parse(strScanIP);
            strflag = strScanIP;
            try
            {
                //址获取DNS主机信息
                IPHostEntry myScanHost = Dns.GetHostByAddress(myScanIP);
                //获取主机名
                string strHostName = myScanHost.HostName.ToString();
                if (strIP == "")
                    strIP += strScanIP + "->" + strHostName;
                else
                    strIP += "," + strScanIP + "->" + strHostName;
            }
            catch { }
        }
    }
    #endregion
}
partial class Form
{
    /// <summary>
    /// 必需的设计器变量。
    /// </summary>
    private System.ComponentModel.IContainer components = null;

    /// <summary>
    /// 清理所有正在使用的资源。
    /// </summary>
    /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
    protected override void Dispose(bool disposing)
    {
        if (disposing && (components != null))
        {
            components.Dispose();
        }
        base.Dispose(disposing);
    }

    #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.components = new System.ComponentModel.Container();
        System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form));
        this.groupBox = new System.Windows.Forms.GroupBox();
        this.label = new System.Windows.Forms.Label();
        this.textBox = new System.Windows.Forms.TextBox();
        this.textBox = new System.Windows.Forms.TextBox();
        this.label = new System.Windows.Forms.Label();
        this.button = new System.Windows.Forms.Button();
        this.progressBar = new System.Windows.Forms.ProgressBar();
        this.timer = new System.Windows.Forms.Timer(this.components);
        this.imageList = new System.Windows.Forms.ImageList(this.components);
        this.listView = new System.Windows.Forms.ListView();
        this.groupBox.SuspendLayout();
        this.SuspendLayout();
        // 
        // groupBox
        // 
        this.groupBox.Controls.Add(this.button1);
        this.groupBox.Controls.Add(this.textBox2);
        this.groupBox.Controls.Add(this.label2);
        this.groupBox.Controls.Add(this.textBox1);
        this.groupBox.Controls.Add(this.label1);
        this.groupBox.Location = new System.Drawing.Point(4, -1);
        this.groupBox.Name = "groupBox1";
        this.groupBox.Size = new System.Drawing.Size(247, 73);
        this.groupBox.TabIndex = 0;
        this.groupBox.TabStop = false;
        // 
        // label
        // 
        this.label.AutoSize = true;
        this.label.Location = new System.Drawing.Point(9, 21);
        this.label.Name = "label1";
        this.label.Size = new System.Drawing.Size(65, 12);
        this.label.TabIndex = 0;
        this.label.Text = "开始地址：";
        // 
        // textBox
        // 
        this.textBox.Location = new System.Drawing.Point(71, 18);
        this.textBox.Name = "textBox1";
        this.textBox.Size = new System.Drawing.Size(112, 21);
        this.textBox.TabIndex = 1;
        this.textBox.Text = "192.168.1.1";
        // 
        // textBox
        // 
        this.textBox.Location = new System.Drawing.Point(71, 45);
        this.textBox.Name = "textBox2";
        this.textBox.Size = new System.Drawing.Size(112, 21);
        this.textBox.TabIndex = 3;
        this.textBox.Text = "192.168.1.255";
        // 
        // label
        // 
        this.label.AutoSize = true;
        this.label.Location = new System.Drawing.Point(9, 48);
        this.label.Name = "label2";
        this.label.Size = new System.Drawing.Size(65, 12);
        this.label.TabIndex = 2;
        this.label.Text = "结束地址：";
        // 
        // button
        // 
        this.button.Location = new System.Drawing.Point(189, 20);
        this.button.Name = "button1";
        this.button.Size = new System.Drawing.Size(50, 44);
        this.button.TabIndex = 4;
        this.button.Text = "开始";
        this.button.UseVisualStyleBackColor = true;
        this.button.Click += new System.EventHandler(this.button1_Click);
        // 
        // progressBar
        // 
        this.progressBar.Location = new System.Drawing.Point(4, 276);
        this.progressBar.Name = "progressBar1";
        this.progressBar.Size = new System.Drawing.Size(247, 15);
        this.progressBar.TabIndex = 2;
        // 
        // timer
        // 
        this.timer.Interval = 1000;
        this.timer.Tick += new System.EventHandler(this.timer1_Tick);
        // 
        // imageList
        // 
        this.imageList.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imageList1.ImageStream")));
        this.imageList.TransparentColor = System.Drawing.Color.Transparent;
        this.imageList.Images.SetKeyName(0, "ip.ico");
        // 
        // listView
        // 
        this.listView.FullRowSelect = true;
        this.listView.LargeImageList = this.imageList1;
        this.listView.Location = new System.Drawing.Point(4, 78);
        this.listView.Name = "listView1";
        this.listView.Size = new System.Drawing.Size(247, 192);
        this.listView.SmallImageList = this.imageList1;
        this.listView.StateImageList = this.imageList1;
        this.listView.TabIndex = 3;
        this.listView.UseCompatibleStateImageBehavior = false;
        this.listView.View = System.Windows.Forms.View.List;
        // 
        // Form
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(F, 12F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(, 293);
        this.Controls.Add(this.listView);
        this.Controls.Add(this.progressBar);
        this.Controls.Add(this.groupBox);
        this.MaximizeBox = false;
        this.MinimizeBox = false;
        this.Name = "Form";
        this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
        this.Text = "局域网IP地址扫描";
        this.FormClosed += new System.Windows.Forms.FormClosedEventHandler(this.Form_FormClosed);
        this.groupBox.ResumeLayout(false);
        this.groupBox.PerformLayout();
        this.ResumeLayout(false);

    }

    #endregion

    private System.Windows.Forms.GroupBox groupBox;
    private System.Windows.Forms.Button button;
    private System.Windows.Forms.TextBox textBox;
    private System.Windows.Forms.Label label;
    private System.Windows.Forms.TextBox textBox;
    private System.Windows.Forms.Label label;
    private System.Windows.Forms.ProgressBar progressBar;
    private System.Windows.Forms.Timer timer;
    private System.Windows.Forms.ImageList imageList;
    private System.Windows.Forms.ListView listView;
}
public partial class Form : Form
{
    public Form()
    {
        InitializeComponent();
    }

    #region 实例化类对象和公共变量
    //实例化DirectoryEntry对象，以便获得局域网组名和计算机名
    DirectoryEntry DEMain = new DirectoryEntry("WinNT:");
    TcpClient TClient = null;       //实例化连接侦听对象
    private Thread myThread;        //实例化线程对象
    string strName = "";            //记录选择的计算机名称
    int intflag =;                //扫描到的端口号
    int intport =;                //记录已用端口号
    int intstart =;               //扫描的开始端口号
    int intend =;                 //扫描的结束端口号
    #endregion

    private void Form_Load(object sender, EventArgs e)
    {
        //遍历局域网中的工作组，并显示在下拉列表控件中
        foreach (DirectoryEntry DEGroup in DEMain.Children)
        {
            comboBox.Items.Add(DEGroup.Name);
        }
    }

    private void comboBox_SelectedIndexChanged(object sender, EventArgs e)
    {
        listBox.Items.Clear();
        foreach (DirectoryEntry DEGroup in DEMain.Children)
        {
            //判断工作组名称
            if (DEGroup.Name.ToLower() == comboBox.Text.ToLower())
            {
                //遍历指定工作组中的所有计算机名称，并显示在ListBox控件中
                foreach (DirectoryEntry DEComputer in DEGroup.Children)
                {
                    if (DEComputer.Name.ToLower() != "schema")
                    {
                        listBox.Items.Add(DEComputer.Name);
                    }
                }
            }
        }
    }

    private void button_Click(object sender, EventArgs e)
    {
        listView.Items.Clear();            //清空ListView控件中的项
        try
        {
            if (button.Text == "扫描")
            {
                intport =;                //初始化已用端口号
                //指定进度条最大值
                progressBar.Minimum = Convert.ToInt32(textBox1.Text);
                //指定进度条最小值
                progressBar.Maximum = Convert.ToInt32(textBox2.Text);
                //指定进度条初始值
                progressBar.Value = progressBar1.Minimum;
                timer.Start();             //开始运行计时器
                button.Text = "停止";      //设置按钮文本为停止
                intstart = Convert.ToInt(textBox1.Text);  //为开始扫描的端口号赋值
                intend = Convert.ToInt(textBox2.Text);    //为结束扫描的端口号赋值
                //使用自定义方法StartScan实例化线程对象
                myThread = new Thread(new ThreadStart(this.StartScan));
                myThread.Start();                           //开始运行扫描端口号的线程
            }
            else
            {
                button.Text = "扫描";      //设置按钮文本为扫描
                timer.Stop();              //停止运行计时器
                //设置进度条的值为最大值
                progressBar.Value = Convert.ToInt32(textBox2.Text);
                if (myThread != null)       //判断线程对象是否为空
                {
                    //判断扫描端口号的线程是否正在运行
                    if (myThread.ThreadState == ThreadState.Running)
                    {
                        myThread.Abort();   //终止线程
                    }
                }
            }
        }
        catch { }
    }

    private void Form_FormClosed(object sender, FormClosedEventArgs e)
    {
        if (myThread != null)               //判断线程对象是否为空
        {
            //判断扫描端口号的线程是否正在运行
            if (myThread.ThreadState == ThreadState.Running)
            {
                myThread.Abort();           //终止线程
            }
        }
    }

    private void listBox_Click(object sender, EventArgs e)
    {
        strName = listBox.SelectedItem.ToString(); //记录选择的计算机名称
    }

    private void timer_Tick(object sender, EventArgs e)
    {
        if (intport !=)                           //判读是否有可用端口号
        {
            if (listView.Items.Count > 0)
            {
                for (int i =; i < listView1.Items.Count; i++)
                {
                    //判断扫描到的端口号是否与列表中的重复
                    if (listView.Items[i].Text != intport.ToString())
                    {
                        //向列表中添加扫描到的已用端口号
                        listView.Items.Add(intport.ToString());
                    }
                }
            }
            else
                //向列表汇总添加扫描到的已用端口号
                listView.Items.Add(intport.ToString());
            intport =;
        }
        if (progressBar.Value < progressBar1.Maximum)  //判断进度条的当前值是否超出其最大值
            progressBar.Value += 1;                    //将进度条的值加1
        if (intflag == Convert.ToInt(textBox2.Text))  //判断正在扫描的端口号是否是结束端口号
        {
            timer.Stop();                              //停止运行计时器
            button.Text = "扫描";                      //设置按钮文本为扫描
            MessageBox.Show("端口扫描结束！");
        }
    }

    #region 扫描端口号
    /// <summary>
    /// 扫描端口号
    /// </summary>
    private void StartScan()
    {
        while (true)
        {
            for (int i = intstart; i <= intend; i++)
            {
                intflag = i;                            //记录正在扫描的端口号
                try
                {
                    TClient = new TcpClient(strName, i);//使用记录的计算机名称和端口号实例化侦听对象
                    intport = i;                        //记录已分配的端口号
                }
                catch { }
            }
        }
    }
    #endregion
}
partial class Form
{
    /// <summary>
    /// 必需的设计器变量。
    /// </summary>
    private System.ComponentModel.IContainer components = null;

    /// <summary>
    /// 清理所有正在使用的资源。
    /// </summary>
    /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
    protected override void Dispose(bool disposing)
    {
        if (disposing && (components != null))
        {
            components.Dispose();
        }
        base.Dispose(disposing);
    }

    #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.components = new System.ComponentModel.Container();
        this.groupBox = new System.Windows.Forms.GroupBox();
        this.listBox = new System.Windows.Forms.ListBox();
        this.label = new System.Windows.Forms.Label();
        this.comboBox = new System.Windows.Forms.ComboBox();
        this.label = new System.Windows.Forms.Label();
        this.groupBox = new System.Windows.Forms.GroupBox();
        this.button = new System.Windows.Forms.Button();
        this.label = new System.Windows.Forms.Label();
        this.textBox = new System.Windows.Forms.TextBox();
        this.textBox = new System.Windows.Forms.TextBox();
        this.label = new System.Windows.Forms.Label();
        this.timer = new System.Windows.Forms.Timer(this.components);
        this.listView = new System.Windows.Forms.ListView();
        this.progressBar = new System.Windows.Forms.ProgressBar();
        this.groupBox.SuspendLayout();
        this.groupBox.SuspendLayout();
        this.SuspendLayout();
        // 
        // groupBox
        // 
        this.groupBox.Controls.Add(this.listBox1);
        this.groupBox.Controls.Add(this.label2);
        this.groupBox.Controls.Add(this.comboBox1);
        this.groupBox.Controls.Add(this.label1);
        this.groupBox.Location = new System.Drawing.Point(8, 7);
        this.groupBox.Name = "groupBox1";
        this.groupBox.Size = new System.Drawing.Size(127, 225);
        this.groupBox.TabIndex = 0;
        this.groupBox.TabStop = false;
        this.groupBox.Text = "选择计算机";
        // 
        // listBox
        // 
        this.listBox.FormattingEnabled = true;
        this.listBox.ItemHeight = 12;
        this.listBox.Location = new System.Drawing.Point(22, 81);
        this.listBox.Name = "listBox1";
        this.listBox.Size = new System.Drawing.Size(94, 136);
        this.listBox.TabIndex = 3;
        this.listBox.Click += new System.EventHandler(this.listBox1_Click);
        // 
        // label
        // 
        this.label.AutoSize = true;
        this.label.Location = new System.Drawing.Point(10, 65);
        this.label.Name = "label2";
        this.label.Size = new System.Drawing.Size(53, 12);
        this.label.TabIndex = 2;
        this.label.Text = "计算机：";
        // 
        // comboBox
        // 
        this.comboBox.FormattingEnabled = true;
        this.comboBox.Location = new System.Drawing.Point(22, 39);
        this.comboBox.Name = "comboBox1";
        this.comboBox.Size = new System.Drawing.Size(94, 20);
        this.comboBox.TabIndex = 1;
        this.comboBox.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged);
        // 
        // label
        // 
        this.label.AutoSize = true;
        this.label.Location = new System.Drawing.Point(10, 22);
        this.label.Name = "label1";
        this.label.Size = new System.Drawing.Size(53, 12);
        this.label.TabIndex = 0;
        this.label.Text = "工作组：";
        // 
        // groupBox
        // 
        this.groupBox.Controls.Add(this.listView1);
        this.groupBox.Controls.Add(this.button1);
        this.groupBox.Controls.Add(this.label4);
        this.groupBox.Controls.Add(this.textBox2);
        this.groupBox.Controls.Add(this.textBox1);
        this.groupBox.Controls.Add(this.label3);
        this.groupBox.Location = new System.Drawing.Point(142, 7);
        this.groupBox.Name = "groupBox2";
        this.groupBox.Size = new System.Drawing.Size(196, 225);
        this.groupBox.TabIndex = 1;
        this.groupBox.TabStop = false;
        this.groupBox.Text = "扫描计算机已用端口号";
        // 
        // button
        // 
        this.button.Location = new System.Drawing.Point(147, 38);
        this.button.Name = "button1";
        this.button.Size = new System.Drawing.Size(41, 23);
        this.button.TabIndex = 5;
        this.button.Text = "扫描";
        this.button.UseVisualStyleBackColor = true;
        this.button.Click += new System.EventHandler(this.button1_Click);
        // 
        // label
        // 
        this.label.AutoSize = true;
        this.label.Location = new System.Drawing.Point(70, 43);
        this.label.Name = "label4";
        this.label.Size = new System.Drawing.Size(17, 12);
        this.label.TabIndex = 4;
        this.label.Text = "到";
        // 
        // textBox
        // 
        this.textBox.Location = new System.Drawing.Point(88, 39);
        this.textBox.Name = "textBox2";
        this.textBox.Size = new System.Drawing.Size(51, 21);
        this.textBox.TabIndex = 3;
        // 
        // textBox
        // 
        this.textBox.Location = new System.Drawing.Point(16, 39);
        this.textBox.Name = "textBox1";
        this.textBox.Size = new System.Drawing.Size(51, 21);
        this.textBox.TabIndex = 2;
        // 
        // label
        // 
        this.label.AutoSize = true;
        this.label.Location = new System.Drawing.Point(8, 21);
        this.label.Name = "label3";
        this.label.Size = new System.Drawing.Size(125, 12);
        this.label.TabIndex = 1;
        this.label.Text = "请设定端口扫描范围：";
        // 
        // timer
        // 
        this.timer.Interval = 1000;
        this.timer.Tick += new System.EventHandler(this.timer1_Tick);
        // 
        // listView
        // 
        this.listView.Location = new System.Drawing.Point(16, 67);
        this.listView.Name = "listView1";
        this.listView.Size = new System.Drawing.Size(172, 150);
        this.listView.TabIndex = 6;
        this.listView.UseCompatibleStateImageBehavior = false;
        this.listView.View = System.Windows.Forms.View.SmallIcon;
        // 
        // progressBar
        // 
        this.progressBar.Dock = System.Windows.Forms.DockStyle.Bottom;
        this.progressBar.Location = new System.Drawing.Point(0, 236);
        this.progressBar.Name = "progressBar1";
        this.progressBar.Size = new System.Drawing.Size(342, 15);
        this.progressBar.TabIndex = 2;
        // 
        // Form
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(F, 12F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(, 251);
        this.Controls.Add(this.progressBar);
        this.Controls.Add(this.groupBox);
        this.Controls.Add(this.groupBox);
        this.Name = "Form";
        this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
        this.Text = "局域网端口扫描";
        this.Load += new System.EventHandler(this.Form_Load);
        this.FormClosed += new System.Windows.Forms.FormClosedEventHandler(this.Form_FormClosed);
        this.groupBox.ResumeLayout(false);
        this.groupBox.PerformLayout();
        this.groupBox.ResumeLayout(false);
        this.groupBox.PerformLayout();
        this.ResumeLayout(false);

    }

    #endregion

    private System.Windows.Forms.GroupBox groupBox;
    private System.Windows.Forms.ListBox listBox;
    private System.Windows.Forms.Label label;
    private System.Windows.Forms.ComboBox comboBox;
    private System.Windows.Forms.Label label;
    private System.Windows.Forms.GroupBox groupBox;
    private System.Windows.Forms.TextBox textBox;
    private System.Windows.Forms.Label label;
    private System.Windows.Forms.Label label;
    private System.Windows.Forms.TextBox textBox;
    private System.Windows.Forms.Button button;
    private System.Windows.Forms.Timer timer;
    private System.Windows.Forms.ListView listView;
    private System.Windows.Forms.ProgressBar progressBar;
}