Null Reference Exception while scrolling with OnDemandAutomatic

2 posts, 0 answers
  1. John
    John avatar
    7 posts
    Member since:
    Feb 2012

    Posted 09 Apr 2013 Link to this post

       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.Primitives.DataControlBase.OnListSourceCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
       at Telerik.Windows.Data.RadListSource.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
       at Telerik.Windows.Data.RadListSource.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 RadarLove.ViewModels.PrivateChatThreadsViewModel.<>c__DisplayClassa.<>c__DisplayClassc.<GetThreads>b__7()
  2. Deyan
    Admin
    Deyan avatar
    2041 posts

    Posted 11 Apr 2013 Link to this post

    Hi John,

    Thanks for writing.

    Can you please submit a demo project which we can use to reproduce the exception on our side? Since we are not aware of similar issue currently, this will help us investigate it provide you with a fix as soon as possible.

    Regards,
    Deyan
    the Telerik team
    Have a suggestion or face a problem - you can use the Ideas & Feedback portal to submit ideas, feedback and vote for them.
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