C# WinForm 检查目标主机的端口是否可连接

一个小工具。

namespace IPPort_CheckTool

{

    partial class MainForm

    {

        /// <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 - 不要修改

        /// 使用代码编辑器修改此方法的内容。

        /// </summary>

        private void InitializeComponent()

        {

            this.groupBox1 = new System.Windows.Forms.GroupBox();

            this.txt_Time = new System.Windows.Forms.Label();

            this.txt_CoreNum = new System.Windows.Forms.Label();

            this.txt_Active = new System.Windows.Forms.Label();

            this.txt_NoActive = new System.Windows.Forms.Label();

            this.btn_Start = new System.Windows.Forms.Button();

            this.label3 = new System.Windows.Forms.Label();

            this.label2 = new System.Windows.Forms.Label();

            this.label1 = new System.Windows.Forms.Label();

            this.txt_PortEnd = new System.Windows.Forms.TextBox();

            this.txt_PortStart = new System.Windows.Forms.TextBox();

            this.txt_IP = new System.Windows.Forms.TextBox();

            this.listBox_NoActive = new System.Windows.Forms.ListBox();

            this.listBox_ActivePort = new System.Windows.Forms.ListBox();

            this.progressBar = new System.Windows.Forms.ProgressBar();

            this.groupBox1.SuspendLayout();

            this.SuspendLayout();

            //

            // groupBox1

            //

            this.groupBox1.Controls.Add(this.progressBar);

            this.groupBox1.Controls.Add(this.txt_Time);

            this.groupBox1.Controls.Add(this.txt_CoreNum);

            this.groupBox1.Controls.Add(this.txt_Active);

            this.groupBox1.Controls.Add(this.txt_NoActive);

            this.groupBox1.Controls.Add(this.btn_Start);

            this.groupBox1.Controls.Add(this.label3);

            this.groupBox1.Controls.Add(this.label2);

            this.groupBox1.Controls.Add(this.label1);

            this.groupBox1.Controls.Add(this.txt_PortEnd);

            this.groupBox1.Controls.Add(this.txt_PortStart);

            this.groupBox1.Controls.Add(this.txt_IP);

            this.groupBox1.Dock = System.Windows.Forms.DockStyle.Top;

            this.groupBox1.Location = new System.Drawing.Point(3, 3);

            this.groupBox1.Margin = new System.Windows.Forms.Padding(5);

            this.groupBox1.Name = "groupBox1";

            this.groupBox1.Padding = new System.Windows.Forms.Padding(5);

            this.groupBox1.Size = new System.Drawing.Size(1058, 127);

            this.groupBox1.TabIndex = 0;

            this.groupBox1.TabStop = false;

            this.groupBox1.Text = "配置：";

            //

            // txt_Time

            //

            this.txt_Time.AutoSize = true;

            this.txt_Time.ForeColor = System.Drawing.Color.Green;

            this.txt_Time.Location = new System.Drawing.Point(844, 101);

            this.txt_Time.Name = "txt_Time";

            this.txt_Time.Size = new System.Drawing.Size(74, 21);

            this.txt_Time.TabIndex = 10;

            this.txt_Time.Text = "耗时：0s";

            //

            // txt_CoreNum

            //

            this.txt_CoreNum.AutoSize = true;

            this.txt_CoreNum.ForeColor = System.Drawing.Color.Green;

            this.txt_CoreNum.Location = new System.Drawing.Point(610, 101);

            this.txt_CoreNum.Name = "txt_CoreNum";

            this.txt_CoreNum.Size = new System.Drawing.Size(120, 21);

            this.txt_CoreNum.TabIndex = 9;

            this.txt_CoreNum.Text = "CPU核心总数:0";

            //

            // txt_Active

            //

            this.txt_Active.AutoSize = true;

            this.txt_Active.ForeColor = System.Drawing.Color.Green;

            this.txt_Active.Location = new System.Drawing.Point(389, 101);

            this.txt_Active.Name = "txt_Active";

            this.txt_Active.Size = new System.Drawing.Size(119, 21);

            this.txt_Active.TabIndex = 8;

            this.txt_Active.Text = "激活端口总数:0";

            //

            // txt_NoActive

            //

            this.txt_NoActive.AutoSize = true;

            this.txt_NoActive.Location = new System.Drawing.Point(3, 101);

            this.txt_NoActive.Name = "txt_NoActive";

            this.txt_NoActive.Size = new System.Drawing.Size(135, 21);

            this.txt_NoActive.TabIndex = 7;

            this.txt_NoActive.Text = "未激活端口总数:0";

            //

            // btn_Start

            //

            this.btn_Start.Location = new System.Drawing.Point(915, 30);

            this.btn_Start.Name = "btn_Start";

            this.btn_Start.Size = new System.Drawing.Size(123, 56);

            this.btn_Start.TabIndex = 6;

            this.btn_Start.Text = "开始测试端口是否激活";

            this.btn_Start.UseVisualStyleBackColor = true;

            this.btn_Start.Click += new System.EventHandler(this.btn_Start_Click);

            //

            // label3

            //

            this.label3.AutoSize = true;

            this.label3.Location = new System.Drawing.Point(530, 41);

            this.label3.Name = "label3";

            this.label3.Size = new System.Drawing.Size(78, 21);

            this.label3.TabIndex = 5;

            this.label3.Text = "结束端口:";

            //

            // label2

            //

            this.label2.AutoSize = true;

            this.label2.Location = new System.Drawing.Point(252, 41);

            this.label2.Name = "label2";

            this.label2.Size = new System.Drawing.Size(78, 21);

            this.label2.TabIndex = 4;

            this.label2.Text = "开始端口:";

            //

            // label1

            //

            this.label1.AutoSize = true;

            this.label1.Location = new System.Drawing.Point(23, 41);

            this.label1.Name = "label1";

            this.label1.Size = new System.Drawing.Size(29, 21);

            this.label1.TabIndex = 3;

            this.label1.Text = "IP:";

            //

            // txt_PortEnd

            //

            this.txt_PortEnd.Location = new System.Drawing.Point(633, 41);

            this.txt_PortEnd.Name = "txt_PortEnd";

            this.txt_PortEnd.Size = new System.Drawing.Size(150, 29);

            this.txt_PortEnd.TabIndex = 2;

            //

            // txt_PortStart

            //

            this.txt_PortStart.Location = new System.Drawing.Point(355, 41);

            this.txt_PortStart.Name = "txt_PortStart";

            this.txt_PortStart.Size = new System.Drawing.Size(150, 29);

            this.txt_PortStart.TabIndex = 1;

            //

            // txt_IP

            //

            this.txt_IP.Location = new System.Drawing.Point(77, 41);

            this.txt_IP.Name = "txt_IP";

            this.txt_IP.Size = new System.Drawing.Size(150, 29);

            this.txt_IP.TabIndex = 0;

            //

            // listBox_NoActive

            //

            this.listBox_NoActive.Dock = System.Windows.Forms.DockStyle.Left;

            this.listBox_NoActive.ForeColor = System.Drawing.Color.Gray;

            this.listBox_NoActive.FormattingEnabled = true;

            this.listBox_NoActive.ItemHeight = 21;

            this.listBox_NoActive.Location = new System.Drawing.Point(3, 130);

            this.listBox_NoActive.Name = "listBox_NoActive";

            this.listBox_NoActive.Size = new System.Drawing.Size(383, 548);

            this.listBox_NoActive.TabIndex = 1;

            //

            // listBox_ActivePort

            //

            this.listBox_ActivePort.Dock = System.Windows.Forms.DockStyle.Fill;

            this.listBox_ActivePort.ForeColor = System.Drawing.Color.Green;

            this.listBox_ActivePort.FormattingEnabled = true;

            this.listBox_ActivePort.ItemHeight = 21;

            this.listBox_ActivePort.Location = new System.Drawing.Point(386, 130);

            this.listBox_ActivePort.Name = "listBox_ActivePort";

            this.listBox_ActivePort.Size = new System.Drawing.Size(675, 548);

            this.listBox_ActivePort.TabIndex = 2;

            //

            // progressBar

            //

            this.progressBar.Location = new System.Drawing.Point(798, 41);

            this.progressBar.Name = "progressBar";

            this.progressBar.Size = new System.Drawing.Size(100, 29);

            this.progressBar.TabIndex = 11;

            //

            // MainForm

            //

            this.AutoScaleDimensions = new System.Drawing.SizeF(10F, 21F);

            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

            this.ClientSize = new System.Drawing.Size(1064, 681);

            this.Controls.Add(this.listBox_ActivePort);

            this.Controls.Add(this.listBox_NoActive);

            this.Controls.Add(this.groupBox1);

            this.Font = new System.Drawing.Font("微软雅黑", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));

            this.Margin = new System.Windows.Forms.Padding(5);

            this.Name = "MainForm";

            this.Padding = new System.Windows.Forms.Padding(3);

            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;

            this.Text = "Hello!";

            this.groupBox1.ResumeLayout(false);

            this.groupBox1.PerformLayout();

            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.GroupBox groupBox1;

        private System.Windows.Forms.Label label1;

        private System.Windows.Forms.TextBox txt_PortEnd;

        private System.Windows.Forms.TextBox txt_PortStart;

        private System.Windows.Forms.TextBox txt_IP;

        private System.Windows.Forms.Label label2;

        private System.Windows.Forms.Label label3;

        private System.Windows.Forms.Button btn_Start;

        private System.Windows.Forms.ListBox listBox_NoActive;

        private System.Windows.Forms.ListBox listBox_ActivePort;

        private System.Windows.Forms.Label txt_NoActive;

        private System.Windows.Forms.Label txt_Active;

        private System.Windows.Forms.Label txt_CoreNum;

        private System.Windows.Forms.Label txt_Time;

        private System.Windows.Forms.ProgressBar progressBar;

    }

}

using System;

using System.Configuration;

using System.Linq;

using System.Net;

using System.Net.NetworkInformation;

using System.Net.Sockets;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace IPPort_CheckTool

{

    public partial class MainForm : Form

    {

        private Configuration config = ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath);

        private DateTime startTime;

        private Task[] tasks;

        private NotifyIcon notifyIcon;

        public MainForm()

        {

            InitializeComponent();

            var now = DateTime.Now;

            this.Text = $"Hello 今天是{now.ToString("dddd")}哟 ";

            this.txt_IP.Text = ConfigurationManager.AppSettings["IP"].ToString();

            this.txt_PortStart.Text = ConfigurationManager.AppSettings["MinPortStart"].ToString();

            this.txt_PortEnd.Text = ConfigurationManager.AppSettings["MaxPortEnd"].ToString();

            this.txt_CoreNum.Text = $"CPU核心总数：{Environment.ProcessorCount}";

            this.components = new System.ComponentModel.Container();

            this.notifyIcon = new NotifyIcon(this.components);

            this.notifyIcon.Visible = true;

            this.notifyIcon.MouseClick += (sn, en) => { if (en.Button == MouseButtons.Left) this.Show(); };

            var menus = new ContextMenu();

            var menu1= new MenuItem("退出软件");

            menu1.Click += (s1, e1) => { this.Close(); };

            menus.MenuItems.Add(menu1);

            notifyIcon.ContextMenu= menus;

        }

        private void btn_Start_Click(object sender, EventArgs e)

        {

            string ip = this.txt_IP.Text.Trim();

            string min = this.txt_PortStart.Text.Trim();

            string max = this.txt_PortEnd.Text.Trim();

            if (string.IsNullOrWhiteSpace(ip) || string.IsNullOrWhiteSpace(min) || string.IsNullOrWhiteSpace(max))

            {

                MessageBox.Show("不能为空！");

                return;

            }

            if (!int.TryParse(min, out var minPort) || !int.TryParse(max, out var maxPort))

            {

                MessageBox.Show("端口不是整数！");

                return;

            }

            config.AppSettings.Settings["IP"].Value = ip;

            config.AppSettings.Settings["MinPortStart"].Value = min;

            config.AppSettings.Settings["MaxPortEnd"].Value = max;

            config.Save();

            ConfigurationManager.RefreshSection("appSettings");

            IPAddress targetIpAddress = IPAddress.Parse(ip);

            var ipadrlist = Dns.GetHostAddresses(Dns.GetHostName()).ToList();

            ipadrlist.Add(IPAddress.Parse("127.0.0.1"));

            ipadrlist.Add(IPAddress.Parse("0.0.0.0"));

            if (ipadrlist.Contains(targetIpAddress))

            {

                CheckLocalPort(minPort, maxPort);//本地IP

            }

            else

            {

                CheckRemotePort(ip, minPort, maxPort);//远程IP

            }

        }

        private void CheckLocalPort(int minPort, int maxPort)

        {

            btn_Start.Enabled = false;

            listBox_NoActive.Items.Clear();

            listBox_ActivePort.Items.Clear();

            startTime = DateTime.Now;

            int length = maxPort - minPort + 1;

            progressBar.Maximum = length;

            progressBar.Minimum = 0;

            var ips = IPGlobalProperties.GetIPGlobalProperties();

            var activeIps = ips.GetActiveTcpListeners().Select(p => p.Port).ToHashSet();

            Task.Factory.StartNew(new Action(() =>

            {

                for (int i = minPort; i <= maxPort; i++)

                {

                    int port = i;

                    this?.Invoke(new Action(() =>

                    {

                        if (activeIps.Contains(port))

                        {

                            listBox_ActivePort.Items.Insert(0, port);

                            txt_Active.Text = $"激活端口总数：{listBox_ActivePort.Items.Count}";

                        }

                        else

                        {

                            listBox_NoActive.Items.Insert(0, port);

                            txt_NoActive.Text = $"未激活端口总数：{listBox_NoActive.Items.Count}";

                        }

                        progressBar.Value = listBox_ActivePort.Items.Count + listBox_NoActive.Items.Count;

                        txt_Time.Text = $"耗时：{(DateTime.Now - startTime).TotalSeconds.ToString()}s";

                        //耗时操作卡死UI 处理方法

                        Application.DoEvents();

                    }));

                }

            })).ContinueWith(p => InitUI());

        }

        private void CheckRemotePort(string ip, int minPort, int maxPort)

        {

            btn_Start.Enabled = false;

            listBox_NoActive.Items.Clear();

            listBox_ActivePort.Items.Clear();

            startTime = DateTime.Now;

            int length = maxPort - minPort + 1;

            tasks = new Task[length];

            progressBar.Maximum = length;

            progressBar.Minimum = 0;

            Task.Run(() =>

            {

                for (int i = minPort; i <= maxPort; i++)

                {

                    int port = i;

                    var task = Task.Factory.StartNew(new Action(() =>

                    {

                        var res = CheckRemotePortCanConnect(ip, port);

                        this?.Invoke(new Action(() =>

                        {

                            if (res.Item1)

                            {

                                listBox_ActivePort.Items.Insert(0, res.Item2);

                                txt_Active.Text = $"激活端口总数：{listBox_ActivePort.Items.Count}";

                            }

                            else

                            {

                                listBox_NoActive.Items.Insert(0, res.Item2);

                                txt_NoActive.Text = $"未激活端口总数：{listBox_NoActive.Items.Count}";

                            }

                            progressBar.Value = listBox_ActivePort.Items.Count + listBox_NoActive.Items.Count;

                            txt_Time.Text = $"耗时：{(DateTime.Now - startTime).TotalSeconds.ToString()}s";

                            //耗时操作卡死UI 处理方法

                            Application.DoEvents();

                        }));

                    }));

                    tasks[i - minPort] = task;

                }

                Task.WaitAll(tasks);

            }).ContinueWith(p => InitUI());

        }

        private void InitUI()

        {

            this?.Invoke(new Action(() => { btn_Start.Enabled = true; }));

        }

        private (bool,int) CheckRemotePortCanConnect(string ipString, int port)

        {

            IPAddress ip = IPAddress.Parse(ipString);

            bool isConnect = false;

            TcpClient tcp = new TcpClient();

            try

            {

                tcp.Connect(ip, port);

                isConnect = tcp.Connected;

            }

            catch (Exception)

            {

                isConnect = false;

            }

            finally

            {

                tcp?.Close();

                tcp?.Dispose();

            }

            return (isConnect, port);

        }

    }

}

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