WindowsForm托盘实现

创建一个空白的窗体也可以

拖放NotifyIcon到窗体中，然后右击属性，在Text取个应用名称，再拖一个ContextMenuStrip到窗体中


创建一个“退出”菜单，双击下生成退出事件，然后在退出事件中编写代码退出应用程序

  //退出
        private void ExitToolStripMenuItem_Click(object sender, EventArgs e)
        {
             this.Invoke(()=> {
                if (cancellToken != null)
                {
                    cancellToken.Cancel(true);
                    task1?.Dispose();
                }
                //停止接收消息
                RocketHelpter.StopConsumer();
            });

            //退出         
            Application.Exit();
        }

在notifyIcon1属性栏，选择关联右键菜单

Form1.cs代码参考：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsPrint
{
    public partial class Form1 : Form
    {
        public static Task task1 = null;
        public static CancellationTokenSource cancellToken = new CancellationTokenSource();

        /// <summary>
        /// 是否退出了？1=是，0=否
        /// </summary>
        public static int isExit = 0;

        public Form1()
        {
            InitializeComponent();

            this.WindowState = FormWindowState.Minimized;
            //隐藏任务栏区图标
            this.ShowInTaskbar = false;
            不显示
            this.Hide();
            //图标显示在托盘区
            notifyIcon1.Visible = true;
            //图标设置
            notifyIcon1.Icon = new Icon(AppDomain.CurrentDomain.BaseDirectory + "\\print_pref.ico");

            //启动接收
            task1 = Task.Run(() =>
            {
                // 接收RocketMQ打印消息
                RocketHelpter.ReviceMsg();
            }, cancellToken.Token);
        }

        //退出
        private void ExitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            isExit = 1;
            this.Invoke(()=> {
                if (cancellToken != null)
                {
                    cancellToken.Cancel(true);
                    task1?.Dispose();
                }
                //停止接收消息
                RocketHelpter.StopConsumer();
            });

            //退出         
            Application.Exit();
        }


    }
}