WPF Application Shutdown Mode

有三种shutdown mode

Member name	Description
OnLastWindowClose	An application shuts down when either the last window closes, or Shutdown is called.
OnMainWindowClose	An application shuts down when either the main window closes, or Shutdown is called.
OnExplicitShutdown	An application shuts down only when Shutdown is called.

其中OnMainWindowClose这个挺有用，但首先要知道如何指定MainWindow。

指定MainWindow的两种途径：

1. 在代码中指定

/// <summary>
/// Interaction logic for App.xaml
/// </summary>
public App()
{
Window oldMainWindow = this.MainWindow;// Get main window

Window newMainWindow = new Window1();
this.MainWindow = new Window();// Set mainwindow
}

2. 在XAML中指定

<Application
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="StartupWindow.xaml"
>
<Application.MainWindow>
<NavigationWindow Source="MainPage.xaml" Visibility="Visible"></NavigationWindow>
</Application.MainWindow>
</Application>

配置Shutdown Mode
这里我们选择OnMainWindowClose：

<Application x:Class="TestApplication.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation%22
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml%22
StartupUri="Window1.xaml"
ShutdownMode="OnMainWindowClose"
>
</Application>