ScheduleView throws an error when cancel create new appointment

[Iurie Coroban]

Hi, Telerik!
    RadScheduleView throws an error when cancel create new apointment:
Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index.
 Error details:    at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
   at System.ThrowHelper.ThrowArgumentOutOfRangeException()
   at System.Collections.Generic.List`1.get_Item(Int32 index)
   at System.Collections.Generic.List`1.System.Collections.IList.get_Item(Int32 index)
   at System.Windows.Data.ListCollectionView.ProcessCollectionChangedWithAdjustedIndex(EffectiveNotifyCollectionChangedAction action, Object oldItem, Object newItem, Int32 adjustedOldIndex, Int32 adjustedNewIndex)
   at System.Windows.Data.ListCollectionView.ProcessCollectionChangedWithAdjustedIndex(NotifyCollectionChangedEventArgs args, Int32 adjustedOldIndex, Int32 adjustedNewIndex)
   at System.Windows.Data.ListCollectionView.CancelNew()
   at Telerik.Windows.Controls.ScheduleView.ScheduleViewDataConnection.HackCollectionViewBug(Boolean isCommit)
   at Telerik.Windows.Controls.ScheduleViewBase.Cancel()
   at Telerik.Windows.Controls.ScheduleViewBase.OnAppointmentEditCancelled(Object sender, EventArgs e)
   at Telerik.Windows.Controls.SchedulerDialogViewModel.OnCancelled(EventArgs eventArgs)
   at Telerik.Windows.Controls.SchedulerDialogViewModel.<OnCancelCommand>b__2(SchedulerDialogViewModel vm)
   at Telerik.Windows.Controls.SchedulerDialogViewModel.DoWithViewModel[T](Object sender, Action`1 action)
   at Telerik.Windows.Controls.SchedulerDialogViewModel.OnCancelCommand(Object sender, ExecutedRoutedEventArgs e)
   at Telerik.Windows.Controls.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
   at Telerik.Windows.Controls.CommandManager.FindCommandBinding(CommandBindingCollection commandBindings, Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
   at Telerik.Windows.Controls.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
   at Telerik.Windows.Controls.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
   at Telerik.Windows.Controls.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target)
   at Telerik.Windows.RadRoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at Telerik.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RadRoutedEventArgs routedEventArgs)
   at Telerik.Windows.EventRoute.InvokeHandlersImpl(Object source, RadRoutedEventArgs args, Boolean raisedAgain)
   at Telerik.Windows.RadRoutedEventHelper.RaiseEvent(DependencyObject element, RadRoutedEventArgs args)
   at Telerik.Windows.Controls.RoutedCommand.ExecuteImpl(Object parameter, UIElement target)
   at Telerik.Windows.Controls.RoutedCommand.Execute(Object parameter, UIElement target)
   at Telerik.Windows.Controls.RadButton.ExecuteCommand()
   at Telerik.Windows.Controls.RadButton.OnClick()
   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e)
   at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName)   at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
   at System.ThrowHelper.ThrowArgumentOutOfRangeException()
   at System.Collections.Generic.List`1.get_Item(Int32 index)
   at System.Collections.Generic.List`1.System.Collections.IList.get_Item(Int32 index)
   at System.Windows.Data.ListCollectionView.ProcessCollectionChangedWithAdjustedIndex(EffectiveNotifyCollectionChangedAction action, Object oldItem, Object newItem, Int32 adjustedOldIndex, Int32 adjustedNewIndex)
   at System.Windows.Data.ListCollectionView.ProcessCollectionChangedWithAdjustedIndex(NotifyCollectionChangedEventArgs args, Int32 adjustedOldIndex, Int32 adjustedNewIndex)
   at System.Windows.Data.ListCollectionView.CancelNew()
   at Telerik.Windows.Controls.ScheduleView.ScheduleViewDataConnection.HackCollectionViewBug(Boolean isCommit)
   at Telerik.Windows.Controls.ScheduleViewBase.Cancel()
   at Telerik.Windows.Controls.ScheduleViewBase.OnAppointmentEditCancelled(Object sender, EventArgs e)
   at Telerik.Windows.Controls.SchedulerDialogViewModel.OnCancelled(EventArgs eventArgs)
   at Telerik.Windows.Controls.SchedulerDialogViewModel.<OnCancelCommand>b__2(SchedulerDialogViewModel vm)
   at Telerik.Windows.Controls.SchedulerDialogViewModel.DoWithViewModel[T](Object sender, Action`1 action)
   at Telerik.Windows.Controls.SchedulerDialogViewModel.OnCancelCommand(Object sender, ExecutedRoutedEventArgs e)
   at Telerik.Windows.Controls.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
   at Telerik.Windows.Controls.CommandManager.FindCommandBinding(CommandBindingCollection commandBindings, Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
   at Telerik.Windows.Controls.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
   at Telerik.Windows.Controls.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
   at Telerik.Windows.Controls.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target)
   at Telerik.Windows.RadRoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at Telerik.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RadRoutedEventArgs routedEventArgs)
   at Telerik.Windows.EventRoute.InvokeHandlersImpl(Object source, RadRoutedEventArgs args, Boolean raisedAgain)
   at Telerik.Windows.RadRoutedEventHelper.RaiseEvent(DependencyObject element, RadRoutedEventArgs args)
   at Telerik.Windows.Controls.RoutedCommand.ExecuteImpl(Object parameter, UIElement target)
   at Telerik.Windows.Controls.RoutedCommand.Execute(Object parameter, UIElement target)
   at Telerik.Windows.Controls.RadButton.ExecuteCommand()
   at Telerik.Windows.Controls.RadButton.OnClick()
   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e)
   at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName)
Can you tell me, please, the possible reason of this error? How can i rezolve this problem?
By the way, this error raise just only when ActiveViewDefinition is dayViewDefinition.

[Valeri Hristov]

Hello Iurie,

Please, use a ObservableCollection<Appointment> or other source that implements INotifyCollectionChanged as a AppointmentsSource for RadScheduleView. This should solve the problem.

The Silverlight (and WPF too) ListCollectionView has a bug that prevents it from creating new items when the the view does not contain other items. We have workarounded this bug, but the workaround requires the appointments source to be INotifyCollectionChanged.

Regards,
Valeri Hristov
the Telerik team

[Iurie Coroban]

Problem is rezolved, thanks a lot for quick reply

[Scott Christian]

I have a similar issue when i cancel a createnew in the appointmentcreating event by setting e.cancel = true when there are no appointments in the obseverablecollection of a custom appointment type. I tried creating a sample app with as close to the scenario I could and it did not get the exception. I get the below exception any guidance would be greatly appreciated. This the WPF ScheduleView. 

System.ArgumentOutOfRangeException was unhandled
  Message=Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
  Source=mscorlib
  ParamName=index
  StackTrace:
       at System.Collections.ArrayList.get_Item(Int32 index)
       at System.Windows.Data.ListCollectionView.ProcessCollectionChangedWithAdjustedIndex(NotifyCollectionChangedEventArgs args, Int32 adjustedOldIndex, Int32 adjustedNewIndex)
       at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
       at System.Windows.Data.ListCollectionView.CancelNew()
       at Telerik.Windows.Controls.ScheduleView.ScheduleViewDataConnection.HackCollectionViewBug(Boolean isCommit)
       at Telerik.Windows.Controls.ScheduleView.ScheduleViewDataConnection.CancelNew()
       at Telerik.Windows.Controls.ScheduleViewBase.CreateNew(Slot slot)
       at Telerik.Windows.Controls.ScheduleViewBase.CreateAppointmentWithDialog(Object parameter)
       at Telerik.Windows.Controls.ScheduleViewBase.OnCreateAppointmentExecuted(Object sender, ExecutedRoutedEventArgs e)
       at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
       at System.Windows.Input.CommandManager.ExecuteCommandBinding(Object sender, ExecutedRoutedEventArgs e, CommandBinding commandBinding)
       at System.Windows.Input.CommandManager.FindCommandBinding(CommandBindingCollection commandBindings, Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
       at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
       at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
       at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
       at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
       at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
       at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
       at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated)
       at System.Windows.Input.CommandManager.TranslateInput(IInputElement targetElement, InputEventArgs inputEventArgs)
       at System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e)
       at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
       at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
       at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
       at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
       at System.Windows.Input.InputManager.ProcessStagingArea()
       at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
       at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
       at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
       at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
       at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
       at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
       at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
       at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
       at System.Windows.Application.RunInternal(Window window)
       at OakLeaf.MM.Main.WPF.mmApplicationWrapper.OnStartup(StartupEventArgs eventArgs)
       at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
       at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
       at DSN.Exec.WPF.MainEntry.Main(String[] args) in E:\Visual Studio TFS\Projects\DSN Exec Software\DSN Exec Software\DSN WPF\MainEntry.cs:line 106
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

[Valeri Hristov]

Hi Scott,

If you are not using the latest version of RadScheduleView, please try it. I am afraid that without a sample application to debug I cannot help much. Why do you need to cancel the AppointmentCreating event?

Best wishes,
Valeri Hristov
the Telerik team