利用c#制作托盘程序，并禁止多个应用实例运行

托盘程序的制作:

1.把NotifyIcon控件拉一个到窗体上，并设置NotifyIcon的Icon(很重要!否则运行后看不到效果)
2.窗体关闭时，将程序最小化到系统托盘上

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
    //MessageBox.Show("程序将最小化到系统托盘区");
     e.Cancel = true; // 取消关闭窗体
    this.Hide();
    this.ShowInTaskbar = false;//取消窗体在任务栏的显示
    this.notifyIcon1.Visible = true;//显示托盘图标

}

3.放一个上下文菜单，添加几个基本项,"显示主窗体","退出" ,将这个菜单挂到NotifyIcon上

private void menuShow_Click(object sender, EventArgs e)
{
    
    this.Show();
    this.ShowInTaskbar = true;
    this.notifyIcon1.Visible = false;
}


private void menuExit_Click(object sender, EventArgs e)
{
    this.Dispose(true);
     Application.ExitThread();
}

4.左键单击托盘图标时，显示主窗体,右击时当然是弹出上面设置的菜单

private void notifyIcon1_MouseClick(object sender, MouseEventArgs e)
{
    if (e.Button == MouseButtons.Left)
    {
        this.Show();
        this.ShowInTaskbar = true;
        this.notifyIcon1.Visible = false;
     }
}

防止这个程序同时运行多个

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Threading;

namespace LuceneTest
{
    static class Program
    {
        /**//// <summary>
        /// 应用程序的主入口点。
        /// </summary>
         [STAThread]
        static void Main()
        {
            bool bCreatedNew;
             Mutex m = new Mutex(false, "Product_Index_Cntvs", out bCreatedNew);
            if (bCreatedNew)
            {
                 Application.EnableVisualStyles();
                 Application.SetCompatibleTextRenderingDefault(false);
                 Application.Run(new Form1());
             }
         }
     }
}