Hello,
When I use RadScheduleView in visual studio designer, the following exception appears and I cannot visualize control at design-time:
(Note all is fine at runtime).
NullReferenceException: Object reference not set to an instance of an object.
StackTrace:
at Telerik.Windows.Controls.ScheduleView.AppointmentExtensions.GetOccurrences(IAppointment appointment, DateTime from, DateTime to)
at Telerik.Windows.Controls.DateGroupDescription.GroupNameFromItem(Object item, Int32 level, CultureInfo culture)
at MS.Internal.Data.CollectionViewGroupRoot.AddToSubgroups(Object item, LiveShapingItem lsi, CollectionViewGroupInternal group, Int32 level, Boolean loading)
at System.Windows.Data.ListCollectionView.PrepareGroups()
at System.Windows.Data.ListCollectionView.PrepareLocalArray()
at System.Windows.Data.ListCollectionView.RefreshOverride()
at System.Windows.Data.CollectionView.RefreshInternal()
at System.Windows.Data.CollectionView.Refresh()
at System.Windows.Data.CollectionView.EndDefer()
at System.Windows.Data.CollectionView.DeferHelper.Dispose()
at Telerik.Windows.Controls.ScheduleView.ScheduleViewDataConnection.SetGroupingAndFiltering(IEnumerable`1 groupDescriptions)
at Telerik.Windows.Controls.ScheduleViewBase.RegenerateGroupHeaders()
at Telerik.Windows.Controls.ScheduleViewBase.OnAppointmentSourceChanged(IEnumerable oldValue, IEnumerable newValue)
at Telerik.Windows.Controls.ScheduleViewBase.UpdateScheduleViewOnAppointmentSourceChanged(IEnumerable oldValue, IEnumerable newValue)
at Telerik.Windows.Controls.ScheduleViewBase.OnAppointmentsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
at System.Windows.Data.BindingExpressionBase.Invalidate(Boolean isASubPropertyChange)
at System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
at System.Windows.Data.BindingExpression.Activate(Object item)
at System.Windows.Data.BindingExpression.AttachToContext(AttachAttempt attempt)
at System.Windows.Data.BindingExpression.MS.Internal.Data.IDataBindEngineClient.AttachToContext(Boolean lastChance)
at MS.Internal.Data.DataBindEngine.Task.Run(Boolean lastChance)
at MS.Internal.Data.DataBindEngine.Run(Object arg)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 nu
Any Idea ? Tanks a lot !
3 Answers, 1 is accepted
Can you confirm which version of UI for WPF are you using? Also are you always able to reproduce this issue or sometimes? Can you provide code snippet or project, so we can check it on our side?
I'm looking forward to hearing from you.
Regards,
Kalin
Progress Telerik
Rank 1
Hello,
after a visual studio restart, the problem disappear.
Thank you !
I'm glad the issue is resolved. If you have any other questions or concerns, please do not hesitate to contact us.
Regards,
Kalin
Progress Telerik