使用WPF最小化/关闭应用程序到系统托盘

Question

我想在用户最小化或关闭表单时在系统托盘中添加应用程序。我为Minimize案做了这件事。任何人都可以告诉我，当我关闭表单时，如何保持我的应用程序运行并将其添加到系统托盘中？

public MainWindow() 
    { 
     InitializeComponent(); 
     System.Windows.Forms.NotifyIcon ni = new System.Windows.Forms.NotifyIcon(); 
     ni.Icon = new System.Drawing.Icon(Helper.GetImagePath("appIcon.ico")); 
     ni.Visible = true; 
     ni.DoubleClick += 
      delegate(object sender, EventArgs args) 
      { 
       this.Show(); 
       this.WindowState = System.Windows.WindowState.Normal; 
      }; 
     SetTheme(); 
    } 

    protected override void OnStateChanged(EventArgs e) 
    { 
     if (WindowState == System.Windows.WindowState.Minimized) 
      this.Hide(); 
     base.OnStateChanged(e); 
    } 

Answer 1

您不需要使用OnStateChanged()。而是使用PreviewClosed事件。

public MainWindow() 
{ 
    ... 
    PreviewClosed += OnPreviewClosed; 
} 

private void OnPreviewClosed(object sender, WindowPreviewClosedEventArgs e) 
{ 
    m_savedState = WindowState; 
    Hide(); 
    e.Cancel = true; 
} 

Answer 2

您还可以覆盖OnClosing保持应用程序的运行，并在用户关闭应用程序最小化到系统托盘。

MainWindow.xaml.cs

public partial class MainWindow : Window 
{ 
    public MainWindow(App application) 
    { 
     InitializeComponent(); 
    } 

    // minimize to system tray when applicaiton is minimized 
    protected override void OnStateChanged(EventArgs e) 
    { 
     if (WindowState == WindowState.Minimized) this.Hide(); 

     base.OnStateChanged(e); 
    } 

    // minimize to system tray when applicaiton is closed 
    protected override void OnClosing(CancelEventArgs e) 
    { 
     // setting cancel to true will cancel the close request 
     // so the application is not closed 
     e.Cancel = true; 

     this.Hide(); 

     base.OnClosing(e); 
    } 
}