c# – 处理应用程序关闭来自Icon的调用

我在我的主窗口上添加了Closing事件的代码,用于点击X,它可以在没有问题的情况下取消事件(它通过“你确定吗？确保保存”类型对话框和闭幕活动)

不幸的是,如果我双击图标它会在RibbonWindow_Closing事件上点击我的断点,但是当e.Cancel设置为true时它无论如何都会关闭,就像它被Application.Current.Shutdown()调用一样.

Alt-F4(和图标 – >关闭)和X按钮都正确处理,但没有双击图标本身

有谁知道为什么会这样？我正在使用Prism,如果重要的话,主窗口是由引导程序创建的.

这是堆栈跟踪,除了命中我的RibbonWindow_Closing事件之外的所有外部代码：

MyProgram.exe!MyProgram.Shell.RibbonWindow_Closing(object sender,System.ComponentModel.CancelEventArgs e) Line 64  C#
 PresentationFramework.dll!System.Windows.Window.OnClosing(System.ComponentModel.CancelEventArgs e) + 0x91 bytes

PresentationFramework.dll!System.Windows.Window.WmClose() + 0x96 bytes  
    PresentationFramework.dll!System.Windows.Window.WindowFilterMessage(system.intPtr hwnd,int msg,system.intPtr wParam,system.intPtr lParam,ref bool handled) + 0xe5 bytes 
 PresentationCore.dll!System.Windows.Interop.HwndSource.PublicHooksFilterMessage(system.intPtr hwnd,ref bool handled) + 0x7e bytes    
 WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(system.intPtr hwnd,ref bool handled) + 0xbe bytes   
 WindowsBase.dll!MS.Win32.HwndSubclass.dispatcherCallbackOperation(object o) + 0x7d bytes   
 WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback,object args,int numArgs) + 0x53 bytes    
 WindowsBase.dll!MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(object source,System.Delegate method,int numArgs,System.Delegate catchHandler) + 0x42 bytes   
 WindowsBase.dll!System.Windows.Threading.dispatcher.InvokeImpl(System.Windows.Threading.dispatcherPriority priority,System.TimeSpan timeout,int numArgs) + 0xb4 bytes   
 WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(system.intPtr hwnd,system.intPtr lParam) + 0x104 bytes   
 [Native to Managed Transition] 
 [Managed to Native Transition] 
 PresentationFramework.dll!System.Windows.Window.InternalClose(bool shutdown,bool ignoreCancel) + 0xa1 bytes   
 PresentationFramework.dll!System.Windows.Application.DoShutdown() + 0x1b6 bytes    
 PresentationFramework.dll!System.Windows.Application.ShutdownImpl() + 0x1c bytes   
 PresentationFramework.dll!System.Windows.Application.ShutdownCallback(object arg) + 0x5 bytes  
    WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback,int numArgs) + 0x53 bytes 
 WindowsBase.dll!MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(object source,System.Delegate catchHandler) + 0x42 bytes   
 WindowsBase.dll!System.Windows.Threading.dispatcherOperation.InvokeImpl() + 0x8d bytes

测试RibbonWindow,给出消息但仍然关闭

<ribbon:RibbonWindow x:Class="MyProject.TestShell"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:ribbon="clr-namespace:Microsoft.Windows.Controls.Ribbon;assembly=RibbonControlsLibrary"
        Title="TestShell" Height="300" Width="300" Closing="Window_Closing">
    <Grid>
        <DockPanel LastChildFill="True">
        </DockPanel>
    </Grid>
</ribbon:RibbonWindow>

这作为常规窗口,获取消息并保持打开状态：

<Window x:Class="MyProject.TestShell"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="TestShell" Height="300" Width="300" Closing="Window_Closing">
    <Grid>
        <DockPanel LastChildFill="True">
        </DockPanel>
    </Grid>
</Window>

代码背后很简单：

private void Window_Closing(object sender,System.ComponentModel.CancelEventArgs e)
{
    e.Cancel = true;
    MessageBox.Show("No close!");
}

更新

好吧我把它缩小到RibbonWindow控件的问题,显然它在双击图标时关闭了应用程序.

显然,如果子窗口以相同的方式关闭,它也会关闭主应用程序：http://social.msdn.microsoft.com/Forums/en/wpf/thread/3e9cdc9c-dfb7-49f2-923a-ead07504d568

/// <summary>
///   This handles the click events on the window icon.
/// </summary>
/// <param name="sender">Click event sender</param>
/// <param name="e">event args</param>
private void IconMouseLeftButtonDown(object sender,MouseButtonEventArgs e)
{
    if (e.ClickCount == 1)
    {
        if (SystemCommands.ShowSystemMenuCommand.CanExecute(null,this))
        {
            SystemCommands.ShowSystemMenuCommand.Execute(null,this);
        }
    }
    else if (e.ClickCount == 2)
    {
        if (ApplicationCommands.Close.CanExecute(null,this))
        {
            ApplicationCommands.Close.Execute(null,this);
        }
    }
}

解决方法

好吧我把它缩小到RibbonWindow控件的问题,显然它在双击图标时关闭了应用程序.

http://social.msdn.microsoft.com/Forums/en/wpf/thread/3e9cdc9c-dfb7-49f2-923a-ead07504d568

/// <summary>
///   This handles the click events on the window icon.
/// </summary>
/// <param name="sender">Click event sender</param>
/// <param name="e">event args</param>
private void IconMouseLeftButtonDown(object sender,this);
        }
    }
}

我在这里找到了解决方案：http://social.msdn.microsoft.com/Forums/en/wpf/thread/9955b191-13d5-4986-a5c0-e73f50a44b44

这是注册我自己的ApplicationClosing命令,如：

[Export]
public partial class TestShell : RibbonWindow
{
    public TestShell()
    {
        InitializeComponent();

        CommandManager.RegisterClassCommandBinding(typeof(TestShell),new CommandBinding(ApplicationCommands.Close,CloseApplicationExecuted));
    }

    private void Window_Closing(object sender,System.ComponentModel.CancelEventArgs e)
    {
        e.Cancel = true;
        MessageBox.Show("Not closing 1!");
    }

    private static void CloseApplicationExecuted(object sender,ExecutedRoutedEventArgs args)
    {
        RibbonWindow window = sender as RibbonWindow;
        if (window != null)
        {
            MessageBox.Show("Not closing 2!");
            args.Handled = true;
        }
    }
}

现在,如果我双击图标我得到“不关闭2！”,以及任何其他关闭方法,我得到“不关闭1！”

希望这可以节省一些时间让我想出来的时间.谢谢Hans帮我诊断问题.

更新：如果您希望CloseApplicationExecuted触发与常规关闭相同的事件,请调用

private static void CloseApplicationExecuted(object sender,ExecutedRoutedEventArgs args)
    {
        RibbonWindow window = sender as RibbonWindow;
        if (window != null)
        {
            args.Handled = true;
            window.Close();
        }
    }