Question

我正在平板电脑模式下为Surface pro开发一个wpf应用程序。我在不同的计算机上编码，一切正常。在表面上测试应用程序时，会发生一些奇怪的事情：

在应用程序期间，将打开第二个窗口，以便修改某些设置。该窗口包含一个按钮以关闭窗口（参见下面的代码）。在表面上单击此按钮时，整个应用程序将关闭（包括主窗口）。在我编写代码的计算机上，这种情况从未发生过，所以在我看来，问题在于硬件。

感谢您的帮助！

编辑21/03/2018

正如评论中所讨论的那样，我已经尝试了几件事情，问题仍然存在。我现在删除了大部分应用程序代码，只剩下基本功能，问题仍然没有消失。我将发布以下代码：

的App.xaml

<Application x:Class="TestNamespace.App"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:local="clr-namespace:TestNamespace"
         Startup="ApplicationStartup">
    <Application.Resources>
        <Style TargetType="{x:Type Window}">
            <Setter Property="FontFamily" Value="Segoe UI" />
        </Style>
    </Application.Resources>
</Application>

App.xaml.cs

public partial class App : Application
{

    public MainWindow window = new MainWindow();
    public Monitoring monitoring;

    private void ApplicationStartup(object sender, StartupEventArgs e)
    {
        window.Show();
        monitoring = new Monitoring();

        window.Content = monitoring.gui;
        this.DispatcherUnhandledException += App_DispatcherUnhandledException;
        this.Dispatcher.UnhandledException += Dispatcher_UnhandledException;
     }

    private void App_DispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
    {
        System.Diagnostics.Debug.WriteLine("App1: There has been an unhandled exception");
        throw new NotImplementedException();
    }

    private void Dispatcher_UnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
    {
        System.Diagnostics.Debug.WriteLine("App2: There has been an unhandled exception");
        throw new NotImplementedException();
    }
}

GUI.xaml

<UserControl x:Class="TestNamespace.GUI"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:oxy="http://oxyplot.org/wpf"
         xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
         xmlns:mi="http://schemas.microsoft.com/expression/2010/interactions"
         xmlns:local="clr-namespace:TestNamespace">
    <Grid Background="Black">
        <Button HorizontalAlignment="Center" VerticalAlignment="Center" 
                Width="300" Height="300"
                Content="NewWindow" Click="SettingsButton_Click"/>
    </Grid>
</UserControl>

GUI.xaml.cs

public partial class GUI : UserControl
{ 
    private Monitoring monitoring;

    public GUI(Monitoring monitoring)
    {
        this.monitoring = monitoring;
        InitializeComponent();
        this.Dispatcher.UnhandledException += Dispatcher_UnhandledException;
    }

    private void Dispatcher_UnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
    {
        System.Diagnostics.Debug.WriteLine(" GUI: There has been an unhandled exception");
        throw new NotImplementedException();
    }

    private void SettingsButton_Click(object sender, RoutedEventArgs e)
    {
        monitoring.settingsWindow = new testWindow();
        monitoring.settingsWindow.Show();
    }
}

Monitoring.cs

public class Monitoring
{
    private App currentApp = (App)Application.Current;
    public GUI gui;
    public Window settingsWindow;

    public Monitoring()
    {
        gui = new GUI(this);
    }
}

TestWindow.xaml

<Window x:Class="TestNamespace.testWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:TestNamespace"
    mc:Ignorable="d"
    Title="testWindow" 
    ResizeMode="NoResize" WindowState="Maximized" WindowStyle="None">
    <Grid>
        <Button x:Name="button" Content="Button" HorizontalAlignment="Left" Margin="245,200,0,0" VerticalAlignment="Top" Width="75" Click="button_Click"/>
    </Grid>
</Window>

TestWindow.xaml.cs

public partial class testWindow : Window
{
    public testWindow()
    {
        InitializeComponent();
        this.Dispatcher.UnhandledException += Dispatcher_UnhandledException;
    }

    private void Dispatcher_UnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
    {
        System.Diagnostics.Debug.WriteLine("TestWindow: There has been an unhandled exception");
        throw new NotImplementedException();
    }

    private void button_Click(object sender, RoutedEventArgs e)
    {
        e.Handled = true;
        this.Close();
    }
}

MainWindow.xaml

<Window x:Class="TestNamespace.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
    xmlns:local="clr-namespace:TestNamespace"
    mc:Ignorable="d"
    ResizeMode="NoResize" WindowStartupLocation="CenterScreen" WindowState="Maximized" WindowStyle="None">

    <Grid Background="White">
        <TextBox x:Name="textBox" HorizontalAlignment="Center" Height="47" TextWrapping="Wrap" Text="LOADING..." VerticalAlignment="Center" Width="198" FontWeight="Bold" FontSize="36" BorderBrush="{x:Null}" />
    </Grid>
</Window>

MainWindow.xaml.cs

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

这是Minimal，Complete和Verifiable示例的完整代码。此代码仍会在平板电脑上产生错误。谢谢你的帮助！

Answer 1

我终于设法解决了这个问题！我没有创建和显示新窗口，而是创建了一个新的UserControl（TestWindow）并更改了mainWindow的内容。关闭TestWindow后，普通GUI作为MainWindow的Content加载，TestWindow设置为null。

这可能不是最佳解决方案，但它确实有效。

编辑1

几周后，我又一次偶然发现了同样的问题。我发现Erti-Chris Eelmaa写的solution最终解决了这个问题。我需要更改Application.ShutdownMode，以便应用程序仅在显式调用Application.Shutdown();时关闭。

Application.ShutdownMode = ShutdownMode.OnExplicitShutdown;

我希望这有帮助！

关闭ChildWindow时，MainWindow会关闭