ArgumentException: "Height must be non-negative" from VirtualizingStackPanel

Question

Hi,

We have a WPF application having a TreeView control with virtualization enabled. TreeView items keep get added(also removed) at run time.

We got an ArgumentException:"Height must be non-negative"(please see the call stack below) while tree items were added to the collection. Collection was updated from the dispatcher.

Could someone tell what could be root cause and the solution? Thanks.

Message: Did skip 41 messages. Content: An exception of type 'System.ArgumentException' occurred and was caught.

2021-03-10T12:45:34.555+01:00
Exception Messages:
ArgumentException : Height must be non-negative.

Type : System.ArgumentException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Message : Height must be non-negative.
Source : WindowsBase
ParamName :
TargetSite : Void set_Height(Double)
Stack Trace : at System.Windows.Rect.set_Height(Double value)
at System.Windows.Controls.VirtualizingStackPanel.ExtendViewport(IHierarchicalVirtualizationAndScrollInfo virtualizationInfoProvider, Boolean isHorizontal, Rect viewport, VirtualizationCacheLength cacheLength, VirtualizationCacheLengthUnit cacheUnit, Size stackPixelSizeInCacheBeforeViewport, Size stackLogicalSizeInCacheBeforeViewport, Size stackPixelSizeInCacheAfterViewport, Size stackLogicalSizeInCacheAfterViewport, Size stackPixelSize, Size stackLogicalSize, Int32& itemsInExtendedViewportCount)
at System.Windows.Controls.VirtualizingStackPanel.IsExtendedViewportFull()
at System.Windows.Controls.VirtualizingStackPanel.ShouldItemsChangeAffectLayoutCore(Boolean areItemChangesLocal, ItemsChangedEventArgs args)
at System.Windows.Controls.VirtualizingStackPanel.ShouldItemsChangeAffectLayoutCore(Boolean areItemChangesLocal, ItemsChangedEventArgs args)
at System.Windows.Controls.VirtualizingStackPanel.ShouldItemsChangeAffectLayoutCore(Boolean areItemChangesLocal, ItemsChangedEventArgs args)
at System.Windows.Controls.VirtualizingStackPanel.ShouldItemsChangeAffectLayoutCore(Boolean areItemChangesLocal, ItemsChangedEventArgs args)
at System.Windows.Controls.VirtualizingPanel.OnItemsChangedInternal(Object sender, ItemsChangedEventArgs args)
at System.Windows.Controls.Panel.OnItemsChanged(Object sender, ItemsChangedEventArgs args)
at System.Windows.Controls.ItemContainerGenerator.OnItemAdded(Object item, Int32 index)
at System.Windows.Controls.ItemContainerGenerator.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
at System.Windows.WeakEventManager.ListenerList1.DeliverEvent(Object sender, EventArgs e, Type managerType) at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args) at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e) at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args) at System.Windows.WeakEventManager.ListenerList1.DeliverEvent(Object sender, EventArgs e, Type managerType)
at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args)
at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
at System.Windows.Data.ListCollectionView.ProcessCollectionChangedWithAdjustedIndex(NotifyCollectionChangedEventArgs args, Int32 adjustedOldIndex, Int32 adjustedNewIndex)
at System.Collections.ObjectModel.ObservableCollection1.OnCollectionChanged(NotifyCollectionChangedEventArgs e) at System.Collections.ObjectModel.ObservableCollection1.InsertItem(Int32 index, T item)