I am working on a WPF application created for a kiosk (touch screen). We create a virtual keyboard for ourselves.
One screen lists some items (maximum 4 items) using the DataGrid control that has a TextBox. The virtual keyboard shows the focus (this is how it is built).
When we randomly select different elements, the application crashes without getting a common exception handler. This problem is repeated on the touch screen, but not on regular screens. The event log shows below
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()
I did a search and found http://social.msdn.microsoft.com/Forums/vstudio/en-US/dfbd2526-8953-4ce8-97c2-43246fd251c0/wpf-framework-crashing-on-setting-foxus-in-textbox ? forum = wpf , which is exactly the same exception.
Any suggestion would be helpful.