<Window x:Class="WeatherSpider.MainWindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"WindowStyle="None" ...>

<Border Grid.Row="0" MouseLeftButtonDown="TitleBarOnMouseLeftButtonDown" ><Grid Margin="5,5,5,0" ><Grid.ColumnDefinitions><ColumnDefinition Width="*"></ColumnDefinition><ColumnDefinition Width="Auto"></ColumnDefinition></Grid.ColumnDefinitions><TextBlock Foreground="GreenYellow" FontSize="16" x:Name="tbTitle">全国机场天气-采集机器人</TextBlock><TextBlock Text="最小化" Grid.Column="1" Foreground="GreenYellow" FontSize="12" VerticalAlignment="Center" TextAlignment="Right" x:Name="btnMin" Cursor="Hand" MouseLeftButtonDown="btnMin_MouseLeftButtonDown"></TextBlock></Grid>
</Border>

private void TitleBarOnMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{base.DragMove();
}

private readonly NotifyIcon notifyIcon;

notifyIcon = new NotifyIcon();
notifyIcon.BalloonTipText = Properties.Resources.AppTitle + " 正在运行！";
notifyIcon.Text = Properties.Resources.AppTitle;//指定托盘提示文字为资源中的AppTitle字符串
notifyIcon.Icon = Properties.Resources.App;//指定托盘图标为资源中的"App"图标
notifyIcon.Visible = false;
notifyIcon.MouseClick += notifyIcon_MouseClick;//托盘右键菜单
MenuItem itemShowMainForm = new MenuItem("显示主界面");
itemShowMainForm.Click += ShowMainWindow;
MenuItem itemExit = new MenuItem("退出");
itemExit.Click += ExitApplication;
MenuItem[] menuItems = new[] { itemShowMainForm, itemExit };
notifyIcon.ContextMenu = new ContextMenu(menuItems);

public void Show() {Visibility = Visibility.Visible;Activate();notifyIcon.Visible = false;
}/// <summary>/// 托盘图标鼠标点击处理/// </summary>/// <param name="sender"></param>/// <param name="e"></param>
void notifyIcon_MouseClick(object sender, MouseEventArgs e)
{if (e.Button == MouseButtons.Left){if (Visibility == Visibility.Visible){Visibility = Visibility.Hidden;notifyIcon.Visible = true;}else{Show();}}
}//显示主界面
void ShowMainWindow(object sender, EventArgs e)
{Show();
}

private void btnMin_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{Visibility = Visibility.Hidden;//隐藏主窗体notifyIcon.Visible = true;//显示托盘图标notifyIcon.ShowBalloonTip(1000);//显示托盘图标上的气泡提示1秒钟
}

Closing += Window_Closing;

private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{if (MessageBox.Show("确定要退出[" + Properties.Resources.AppTitle + "]吗？",Properties.Resources.AppTitle,MessageBoxButton.YesNo,MessageBoxImage.Question,MessageBoxResult.No) == MessageBoxResult.Yes){                this.Closing -= Window_Closing;//注意：这里要注销事件监听，否则会连续弹出二次提示框才能退出notifyIcon.Visible = false;e.Cancel = false;}else{e.Cancel = true;}
}

//捕获关机事件
SystemEvents.SessionEnding += SystemEvents_SessionEnding;

void SystemEvents_SessionEnding(object sender, SessionEndingEventArgs e)
{if (MessageBox.Show("[" + Properties.Resources.AppTitle + "]正在运行中，确定要退出吗？",Properties.Resources.AppTitle,MessageBoxButton.YesNo,MessageBoxImage.Question,MessageBoxResult.No) == MessageBoxResult.Yes){e.Cancel = false;                }else {e.Cancel = true;}
}

private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{if (MessageBox.Show("确定要退出[" + Properties.Resources.AppTitle + "]吗？",Properties.Resources.AppTitle,MessageBoxButton.YesNo,MessageBoxImage.Question,MessageBoxResult.No) == MessageBoxResult.Yes){SystemEvents.SessionEnding -= SystemEvents_SessionEnding; //取消关机事件监听this.Closing -= Window_Closing;notifyIcon.Visible = false;e.Cancel = false;}else{e.Cancel = true;}
}

using System.Windows;
using System.Diagnostics;
using System;
using WeatherSpider.Helper;namespace WeatherSpider
{/// <summary>/// Interaction logic for App.xaml/// </summary>public partial class App : Application{/// <summary>/// Application Entry Point./// </summary>[STAThread][DebuggerNonUserCode]        public static void Main(string[] a){SingleApp app = new SingleApp();//SingleApp类后面马上会提到app.Run(a);}protected override void OnStartup(StartupEventArgs e){base.OnStartup(e);MainWindow w = new MainWindow();w.Show();//即调用主窗体中的Show方法，显示主窗体}public void Activate(){(MainWindow as MainWindow).Show();        }}
}

using Microsoft.VisualBasic.ApplicationServices;namespace WeatherSpider.Helper
{public class SingleApp : WindowsFormsApplicationBase{App a;public SingleApp(){this.IsSingleInstance = true;}protected override bool OnStartup(StartupEventArgs eventArgs){a = new App();           a.Run();return false;}protected override void OnStartupNextInstance(StartupNextInstanceEventArgs eventArgs){base.OnStartupNextInstance(eventArgs);a.Activate();//第二个实例试图“启动”时，自动把已经运行的实例激活并显示}}}