Winform实现系统托盘后台运行功能

核心代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Windows;
namespace winform窗体托盘后台运行
{
   public partial class Form1 : Form   
   {  

    //这里在窗体上没有拖拽一个NotifyIcon控件，而是在这里定义了一个变量  
    private NotifyIcon notifyIcon = null;  

    public Form1()  
    {  

        InitializeComponent();  

        //调用初始化托盘显示函数  
        InitialTray();  

    }  


    /// <summary>  

    /// 窗体关闭的单击事件  

    /// </summary>  

    /// <param name="sender"></param>  

    /// <param name="e"></param>  

    private void Form1_FormClosing(object sender, FormClosingEventArgs e)  
    {  
        e.Cancel = true;  
    //通过这里可以看出，这里的关闭其实不是真正意义上的“关闭”，而是将窗体隐藏，实现一个“伪关闭”  
        this.Hide();  

    }  


    private void InitialTray()  
    {  

        //隐藏主窗体  

        this.Hide();  

        //实例化一个NotifyIcon对象  

        notifyIcon = new NotifyIcon();  

        //托盘图标气泡显示的内容  

        notifyIcon.BalloonTipText = "正在后台运行";     

        //托盘图标显示的内容  

        notifyIcon.Text = "窗体托盘后台运行测试程序";  

        //注意：下面的路径可以是绝对路径、相对路径。但是需要注意的是：文件必须是一个.ico格式  
        
         //相对路径
        //这个是程序根目录下面的一张图片demo.ico
        string path = System.IO.Path.Combine((Application.StartupPath + @"\"), "demo.ico");
  notifyIcon.Icon = new System.Drawing.Icon(path); 

        //绝对路径
       // notifyIcon.Icon = new System.Drawing.Icon("E:/ASP项目/images/3.5 inch Floppy.ico");  


        //true表示在托盘区可见，false表示在托盘区不可见  

        notifyIcon.Visible = true;  

        //气泡显示的时间（单位是毫秒）  

        notifyIcon.ShowBalloonTip(2000);              

        notifyIcon.MouseClick += new System.Windows.Forms.MouseEventHandler(notifyIcon_MouseClick);  


        设置二级菜单  

        //MenuItem setting1 = new MenuItem("二级菜单1");  

        //MenuItem setting2 = new MenuItem("二级菜单2");  

        //MenuItem setting = new MenuItem("一级菜单", new MenuItem[]{setting1,setting2});  



        //帮助选项，这里只是“有名无实”在菜单上只是显示，单击没有效果，可以参照下面的“退出菜单”实现单击事件  

        MenuItem help = new MenuItem("帮助");  

        //关于选项  

        MenuItem about = new MenuItem("关于");  

        //退出菜单项  

        MenuItem exit = new MenuItem("退出");  

        exit.Click += new EventHandler(exit_Click);  


        关联托盘控件  

        //注释的这一行与下一行的区别就是参数不同，setting这个参数是为了实现二级菜单  

        //MenuItem[] childen = new MenuItem[] { setting, help, about, exit };  

        MenuItem[] childen = new MenuItem[] {help,about,exit};  

        notifyIcon.ContextMenu = new ContextMenu(childen);  


        //窗体关闭时触发  

        this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form1_FormClosing);  

    }  



    /// <summary>  

    /// 鼠标单击  

    /// </summary>  

    /// <param name="sender"></param>  

    /// <param name="e"></param>  

    private void notifyIcon_MouseClick(object sender, System.Windows.Forms.MouseEventArgs e)  
    {  

        //鼠标左键单击  

        if (e.Button == MouseButtons.Left)  

        {  

            //如果窗体是可见的，那么鼠标左击托盘区图标后，窗体为不可见  

            if (this.Visible == true )  

            {  

                this.Visible = false;  

            }  

            else  

            {  

                this.Visible = true;  

                this.Activate();  

            }  

        }  

    }  



    /// <summary>  

    /// 退出选项  

    /// </summary>  

    /// <param name="sender"></param>  

    /// <param name="e"></param>  

    private void exit_Click(object sender, EventArgs e)  
    {  
        //退出程序  
       System.Environment.Exit(0);    
    }  
  }  
}