Question

我正在研究为Kiosk（触摸屏）构建的WPF应用程序。我们为自己构建虚拟键盘。

有一个屏幕，我们使用DataGrid控件列出一些项目（最多4个项目），它有一个TextBox。虚拟键盘显示焦点（这就是它的构建方式）。

当我们随机选择不同的项目时，应用程序崩溃而没有到达通用异常处理程序。此问题在触摸屏上可重复，但在常规屏幕中不可重复。事件日志显示如下，

Application: CashNGo.WPF.exe
Framework Version: v4.0.30319
Description: The application requested process termination through System.Environment.FailFast(string
message).
Message: Unrecoverable system error.
Stack:
   at System.Environment.FailFast(System.String)
   at MS.Internal.Invariant.FailFast(System.String, System.String)
   at MS.Internal.Invariant.Assert(Boolean, System.String)
   at System.Windows.Documents.TextStore.VerifyTextStoreConsistency()
   at System.Windows.Documents.TextStore.GrantLock()
   at System.Windows.Documents.TextStore.GrantLockWorker(LockFlags)
   at System.Windows.Documents.TextStore.RequestLock(LockFlags, Int32 ByRef)
   at MS.Win32.UnsafeNativeMethods+ITextStoreACPSink.OnSelectionChange()
   at System.Windows.Documents.TextStore.OnSelectionChanged()
   at System.Windows.Documents.TextSelection.System.Windows.Documents.ITextRange.NotifyChanged(Boolean,
Boolean)
   at System.Windows.Documents.TextRangeBase.EndChange(System.Windows.Documents.ITextRange,
Boolean, Boolean)
   at System.Windows.Documents.TextSelection.System.Windows.Documents.ITextRange.Select(System.Windows.Documents.ITextPointer,
System.Windows.Documents.ITextPointer)
   at System.Windows.Controls.TextBox.Select(Int32, Int32)
   at System.Windows.Controls.TextBox.set_CaretIndex(Int32)
   at Common.Controls.SoftKeyboard.<.cctor>b__1c(System.Windows.Controls.TextBox)
   at System.Windows.Input.DelegateCommand`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089]].Execute(System.__Canon)
   at Common.Controls.SoftKeyboard+<>c__DisplayClass5.<SoftKeyboardFocus_Changed>b__0()
   at System.Windows.Threading.Dispatcher.Invoke(System.Action, System.Windows.Threading.DispatcherPriority,
System.Threading.CancellationToken, System.TimeSpan)
   at System.Windows.Threading.Dispatcher.Invoke(System.Action, System.Windows.Threading.DispatcherPriority)
   at Common.Extensions+<>c__DisplayClass1.<DelayedInvoke>b__0(System.Object, System.EventArgs)
   at System.Windows.Threading.DispatcherTimer.FireTick(System.Object)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object,
Int32)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(System.Object, System.Delegate,
System.Object, Int32, System.Delegate)
  at System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback,
System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback,
System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback,
System.Object)
   at System.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr, Int32, IntPtr, IntPtr, Boolean
ByRef)
   at MS.Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(System.Object)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object,
Int32)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(System.Object, System.Delegate,
System.Object, Int32, System.Delegate)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority,
System.TimeSpan, System.Delegate, System.Object, Int32)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame)
   at System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame)
   at System.Windows.Threading.Dispatcher.Run()
   at System.Windows.Application.RunDispatcher(System.Object)
   at System.Windows.Application.RunInternal(System.Windows.Window)
   at System.Windows.Application.Run(System.Windows.Window)
   at System.Windows.Application.Run()
   at CashNGo.WPF.App.Main()

我做了一些搜索，发现http://social.msdn.microsoft.com/Forums/vstudio/en-US/dfbd2526-8953-4ce8-97c2-43246fd251c0/wpf-framework-crashing-on-setting-foxus-in-textbox?forum=wpf这是完全相同的例外。

任何建议都会有所帮助。

Answer 1

禁用Windows服务也解决了我的问题。在我的Windows 8.1 Pro上，该服务被称为＆＃34;触摸键盘和手写面板服务＆＃34;

Answer 2

关闭名为。

的Windows服务

Tablet PC Input Service

WPF由Environment.FailFast崩溃

2 个答案: