NullReference Exception

2 posts, 0 answers
  1. Imran Shafiq
    Imran Shafiq avatar
    4 posts
    Member since:
    Feb 2010

    Posted 01 Nov 2013 Link to this post

    This is all over our production logs. 


    at Telerik.Windows.Controls.RadDataBoundListBox.get_LastRealizedDataItem()
    at Telerik.Windows.Controls.VirtualizationStrategy.RefreshViewportOnItemAdded(IDataSourceItem addedItem)
    at Telerik.Windows.Controls.RadVirtualizingDataControl.UpdateViewportOnItemsChange(NotifyCollectionChangedEventArgs e)
    at Telerik.Windows.Controls.RadVirtualizingDataControl.OnItemsChanged(NotifyCollectionChangedEventArgs e)
    at Telerik.Windows.Controls.RadDataBoundListBox.OnItemsChanged(NotifyCollectionChangedEventArgs e)
    at Telerik.Windows.Controls.RadJumpList.OnItemsChanged(NotifyCollectionChangedEventArgs e)
    at Telerik.Windows.Controls.Primitives.DataControlBase.OnListSourceCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
    at Telerik.Windows.Data.RadListSource.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
    at Telerik.Windows.Data.RadCollectionViewSource.CreateAndAddNewItem(Object newItem, Int32 newIndex)
    at Telerik.Windows.Data.RadCollectionViewSource.SourceCollectionChangedOverride(NotifyCollectionChangedEventArgs e)
    at Telerik.Windows.Data.RadListSource.OnSourceCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
    at Telerik.Windows.Data.RadListSource.Telerik.Windows.Data.IWeakEventListener.ReceiveEvent(Object sender, EventArgs e)
    at Telerik.Windows.Data.WeakEventHandler`1.ProcessEvent(Object sender, EventArgs e)
    at Telerik.Windows.Data.WeakEventHandler`1.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
    at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
    at System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item)
    at System.Collections.ObjectModel.Collection`1.Add(T item)
    at Wine.ViewModels.MainPageViewModel.d__31.MoveNext()
  2. Deyan
    Admin
    Deyan avatar
    2038 posts

    Posted 01 Nov 2013 Link to this post

    Hi Imran,

    Thanks for writing.

    This is something we are currently not aware of but are willing to investigate.

    Is it possible for you to send us a sample project that reproduces the scenario so that we can debug it on our side and see what causes the exception?

    Regards,
    Deyan
    Telerik
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