Windows10下用国际键盘时WPF .NET3.5应用崩溃求助

问题现象 #

在Windows 10系统中测试基于.NET 3.5的WPF应用时，若系统设置为英语国际键盘，在文本框执行输入操作时应用会直接崩溃，抛出错误：

Culture ID 8192 (0x2000) is not a supported culture.

该问题无法在Windows 7系统上复现，切换为其他键盘布局即可正常使用应用。

错误堆栈跟踪（法语） #

崩溃的堆栈跟踪直接指向微软内部代码，具体信息如下：

System.ArgumentException: L'ID de culture 8192 (0x2000) n'est pas une culture prise en charge. Nom du paramètre : culture 
à System.Globalization.CultureTableRecord.GetCultureTableRecord(Int32 cultureId, Boolean useUserOverride) 
à System.Globalization.CultureInfo..ctor(Int32 culture, Boolean useUserOverride) 
à System.Windows.Input.InputLanguageSource.get_CurrentInputLanguage() 
à System.Windows.Input.InputLanguageManager.get_CurrentInputLanguage() 
à System.Windows.Documents.TextSelection.EnsureCaret(Boolean isBlinkEnabled, CaretScrollMethod scrollMethod) 
à System.Windows.Documents.TextSelection.System.Windows.Documents.ITextSelection.UpdateCaretAndHighlight() 
à System.Windows.Documents.TextEditor.OnGotKeyboardFocus(Object sender, KeyboardFocusChangedEventArgs e) 
à System.Windows.Controls.Primitives.TextBoxBase.OnGotKeyboardFocus(KeyboardFocusChangedEventArgs e) 
à System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) 
à System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) 
à System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) 
à System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted) 
à System.Windows.Input.InputManager.ProcessStagingArea() 
à System.Windows.Input.InputManager.ProcessInput(InputEventArgs input) 
à System.Windows.Input.KeyboardDevice.ChangeFocus(DependencyObject focus, Int32 timestamp) 
à System.Windows.Input.KeyboardDevice.Focus(DependencyObject focus, Boolean askOld, Boolean askNew) 
à System.Windows.Input.KeyboardDevice.Focus(IInputElement element) 
à System.Windows.UIElement.Focus() 
à System.Windows.Documents.TextEditorMouse.MoveFocusToUiScope(TextEditor This) 
à System.Windows.Documents.TextEditorMouse.OnMouseDown(Object sender, MouseButtonEventArgs e) 
à System.Windows.Controls.Primitives.TextBoxBase.OnMouseDown(MouseButtonEventArgs e) 
à System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e) 
à System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) 
à System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) 
à System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) 
à System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted) 
à System.Windows.Input.InputManager.ProcessStagingArea() 
à System.Windows.Input.InputManager.ProcessInput(InputEventArgs input) 
à System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport) 
à System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel) 
à System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) 
à System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) 
à MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) 
à MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) 
à System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter) 
à System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) 
à System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter) 
à MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam) 
à MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg) 
à System.Windows.Threading.Dispatcher.TranslateAndDispatchMessage(MSG& msg) 
à System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame) 
à System.Windows.Application.RunInternal(Window window) 
à MyApp.App.Main() 

解决方向与临时方案 #

• 彻底解决（但有兼容性限制）：将应用的目标框架切换为.NET 4.0即可消除该问题，但如果需要兼容旧系统（如Windows XP），则无法采用此方案。
• 临时解决方案：在应用的OnStartup(StartupEventArgs e)方法中添加检测逻辑，若当前文化设置会引发异常，则提示用户切换键盘布局并关闭应用，示例代码思路如下：

protected override void OnStartup(StartupEventArgs e)
{
    try
    {
        // 尝试获取当前输入语言，触发潜在的文化异常
        var currentLang = System.Windows.Input.InputLanguageManager.Current.CurrentInputLanguage;
    }
    catch (ArgumentException ex)
    {
        // 捕获到文化不支持的异常时提示用户
        MessageBox.Show("当前键盘布局不被支持，请切换为其他键盘布局后重新启动应用。", "兼容性提示", MessageBoxButton.OK, MessageBoxImage.Warning);
        // 关闭应用
        Shutdown();
        return;
    }
    base.OnStartup(e);
}

内容的提问来源于stack exchange，提问作者Sylvain B.