使用Avalon控件出现指定的参数已超出有效值的范围错误
刚刚接触WPF，做了一个主窗口包含4个悬浮窗口的窗体，子窗体可以Auto Hide，但是当从Auto Hide变为固定的时候就会出现指定的参数已超出有效值的范围错误，具体错误信息如下，求高手指教。。。
未处理 System.ArgumentOutOfRangeException
Message=指定的参数已超出有效值的范围。
参数名: index
Source=PresentationFramework
ParamName=index
StackTrace:
在 System.Windows.Controls.ItemCollection.GetItemAt(Int32 index)
在 AvalonDock.DockingManager.ToggleAutoHide(DockablePane pane)
在 AvalonDock.FlyoutDockablePane.ToggleAutoHide()
在 AvalonDock.DockablePane.OnExecuteCommand(Object sender, ExecutedRoutedEventArgs e)
在 System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
在 System.Windows.Input.CommandManager.ExecuteCommandBinding(Object sender, ExecutedRoutedEventArgs e, CommandBinding commandBinding)
在 System.Windows.Input.CommandManager.FindCommandBinding(CommandBindingCollection commandBindings, Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
在 System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
在 System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
在 System.Windows.UIElement.OnExecutedThunk(Object sender, ExecutedRoutedEventArgs e)
在 System.Windows.Input.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target)
在 System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
在 System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
在 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
在 System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
在 System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
在 System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated)
在 System.Windows.Input.RoutedCommand.ExecuteCore(Object parameter, IInputElement target, Boolean userInitiated)
在 MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, Boolean userInitiated)
在 System.Windows.Controls.Primitives.ButtonBase.OnClick()
在 System.Windows.Controls.Button.OnClick()
在 System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
在 System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e)
在 System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
在 System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
在 System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
在 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
在 System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
在 System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
在 System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
在 System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
在 System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
在 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
在 System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
在 System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
在 System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
在 System.Windows.Input.InputManager.ProcessStagingArea()
在 System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
在 System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
在 System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
在 System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
在 System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
在 MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
在 MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
在 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
在 MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
在 System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
在 MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
在 MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
在 System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
在 System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
在 System.Windows.Threading.Dispatcher.Run()
在 System.Windows.Application.RunDispatcher(Object ignore)
在 System.Windows.Application.RunInternal(Window window)
在 System.Windows.Application.Run(Window window)
在 System.Windows.Application.Run()
在 TaianSUCCEED.MineMonitoringSystem.WPF.UserInterface.App.Main() 位置 E:\workspace\TaianSUCCEED.MineMonitoringSystem.WPF.UserInterface\obj\x86\Debug\App.g.cs:行号 0
在 System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
在 System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
在 Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
在 System.Threading.ThreadHelper.ThreadStart_Context(Object state)
在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
在 System.Threading.ThreadHelper.ThreadStart()
InnerException:
[解决办法]
坐等高人帮忙啊，在线等啊
