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ItemContainerGenerator System.ArgumentException An item with the same key has already been added #7467

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wieslawsoltes opened this issue Jan 29, 2022 · 3 comments · Fixed by #9677
Closed

ItemContainerGenerator System.ArgumentException An item with the same key has already been added #7467

wieslawsoltes opened this issue Jan 29, 2022 · 3 comments · Fixed by #9677
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@wieslawsoltes
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wieslawsoltes commented Jan 29, 2022 •
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Describe the bug

System.ArgumentException: An item with the same key has already been added. Key: [1, Avalonia.Controls.Generators.ItemContainerInfo]
   at System.Collections.Generic.TreeSet`1.AddIfNotPresent(T item)
   at System.Collections.Generic.SortedSet`1.Add(T item)
   at System.Collections.Generic.SortedDictionary`2.Add(TKey key, TValue value)
   at Avalonia.Controls.Generators.ItemContainerGenerator.MoveContainer(Int32 oldIndex, Int32 newIndex, Object item) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Generators\ItemContainerGenerator.cs:line 217
   at Avalonia.Controls.Generators.ItemContainerGenerator`1.TryRecycle(Int32 oldIndex, Int32 newIndex, Object item) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Generators\ItemContainerGenerator`1.cs:line 91
   at Avalonia.Controls.Presenters.ItemVirtualizerSimple.RecycleContainersForMove(Int32 delta) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Presenters\ItemVirtualizerSimple.cs:line 432
   at Avalonia.Controls.Presenters.ItemVirtualizerSimple.set_OffsetValue(Double value) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Presenters\ItemVirtualizerSimple.cs:line 68
   at Avalonia.Controls.Presenters.ItemVirtualizerSimple.ScrollIntoViewCore(Int32 index) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Presenters\ItemVirtualizerSimple.cs:line 543
   at Avalonia.Controls.Presenters.ItemVirtualizerSimple.ScrollIntoView(Int32 index) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Presenters\ItemVirtualizerSimple.cs:line 297
   at Avalonia.Controls.Presenters.ItemsPresenter.ScrollIntoView(Int32 index) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Presenters\ItemsPresenter.cs:line 133
   at Avalonia.Controls.Primitives.SelectingItemsControl.ScrollIntoView(Int32 index) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Primitives\SelectingItemsControl.cs:line 362
   at Avalonia.Controls.Primitives.SelectingItemsControl.AutoScrollToSelectedItemIfNecessary() in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Primitives\SelectingItemsControl.cs:line 848
   at Avalonia.Controls.Primitives.SelectingItemsControl.OnSelectionModelPropertyChanged(Object sender, PropertyChangedEventArgs e) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Primitives\SelectingItemsControl.cs:line 763
   at Avalonia.Controls.Selection.SelectionModel`1.RaisePropertyChanged(String propertyName) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Selection\SelectionModel.cs:line 277
   at Avalonia.Controls.Selection.SelectionModel`1.CommitOperation(Operation operation, Boolean raisePropertyChanged) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Selection\SelectionModel.cs:line 726
   at Avalonia.Controls.Selection.SelectionModel`1.EndBatchUpdate() in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Selection\SelectionModel.cs:line 214
   at Avalonia.Controls.Selection.SelectionModel`1.BatchUpdateOperation.Dispose() in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Selection\SelectionModel.cs:line 764
   at Avalonia.Controls.Selection.SelectionModel`1.SelectRange(Int32 start, Int32 end, Boolean forceSelectedIndex, Boolean forceAnchorIndex) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Selection\SelectionModel.cs:line 565
   at Avalonia.Controls.Selection.SelectionModel`1.Select(Int32 index) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Selection\SelectionModel.cs:line 235
   at Avalonia.Controls.Primitives.SelectingItemsControl.OnContainersMaterialized(ItemContainerEventArgs e) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Primitives\SelectingItemsControl.cs:line 430
   at Avalonia.Controls.ItemsControl.<get_ItemContainerGenerator>b__12_0(Object _, ItemContainerEventArgs e) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\ItemsControl.cs:line 93
   at Avalonia.Controls.Generators.ItemContainerGenerator.Materialize(Int32 index, Object item) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Generators\ItemContainerGenerator.cs:line 59
   at Avalonia.Controls.Presenters.ItemVirtualizerSimple.CreateAndRemoveContainers() in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Presenters\ItemVirtualizerSimple.cs:line 334
   at Avalonia.Controls.Presenters.ItemVirtualizerSimple.UpdateControls() in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Presenters\ItemVirtualizerSimple.cs:line 161
   at Avalonia.Controls.VirtualizingStackPanel.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\VirtualizingStackPanel.cs:line 87
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Controls.Presenters.ItemVirtualizerSimple.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Presenters\ItemVirtualizerSimple.cs:line 154
   at Avalonia.Controls.Presenters.ItemsPresenter.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Presenters\ItemsPresenter.cs:line 139
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Controls.Presenters.ScrollContentPresenter.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Presenters\ScrollContentPresenter.cs:line 253
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Grid.cs:line 1150
   at Avalonia.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV, Boolean& hasDesiredSizeUChanged) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Grid.cs:line 1005
   at Avalonia.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Grid.cs:line 968
   at Avalonia.Controls.Grid.MeasureOverride(Size constraint) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Grid.cs:line 427
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Layout.Layoutable.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 625
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Layout.LayoutHelper.MeasureChild(ILayoutable control, Size availableSize, Thickness padding) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\LayoutHelper.cs:line 46
   at Avalonia.Layout.LayoutHelper.MeasureChild(ILayoutable control, Size availableSize, Thickness padding, Thickness borderThickness) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\LayoutHelper.cs:line 39
   at Avalonia.Controls.Border.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Border.cs:line 189
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Layout.Layoutable.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 625
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Controls.StackPanel.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\StackPanel.cs:line 207
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Controls.StackPanel.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\StackPanel.cs:line 207
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Controls.StackPanel.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\StackPanel.cs:line 207
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Controls.Grid.MeasureOverride(Size constraint) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Grid.cs:line 230
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Controls.Grid.MeasureOverride(Size constraint) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Grid.cs:line 230
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Layout.LayoutHelper.MeasureChild(ILayoutable control, Size availableSize, Thickness padding) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\LayoutHelper.cs:line 46
   at Avalonia.Layout.LayoutHelper.MeasureChild(ILayoutable control, Size availableSize, Thickness padding, Thickness borderThickness) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\LayoutHelper.cs:line 39
   at Avalonia.Controls.Presenters.ContentPresenter.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Presenters\ContentPresenter.cs:line 366
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Layout.LayoutHelper.MeasureChild(ILayoutable control, Size availableSize, Thickness padding) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\LayoutHelper.cs:line 46
   at Avalonia.Controls.Decorator.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Decorator.cs:line 54
   at Avalonia.Controls.Primitives.VisualLayerManager.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Primitives\VisualLayerManager.cs:line 133
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Layout.Layoutable.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 625
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 559
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Layout.Layoutable.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 625
   at Avalonia.Controls.Window.MeasureOverride(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Window.cs:line 904
   at Avalonia.Controls.WindowBase.MeasureCore(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\WindowBase.cs:line 244
   at Avalonia.Layout.Layoutable.Measure(Size availableSize) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\Layoutable.cs:line 364
   at Avalonia.Layout.LayoutManager.Measure(ILayoutable control) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\LayoutManager.cs:line 287
   at Avalonia.Layout.LayoutManager.ExecuteInitialLayoutPass() in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Layout\LayoutManager.cs:line 174
   at Avalonia.Controls.Window.ShowCore(Window parent) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Window.cs:line 689
   at Avalonia.Controls.Window.Show() in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\Window.cs:line 627
   at Avalonia.Controls.ApplicationLifetimes.ClassicDesktopStyleApplicationLifetime.ShowMainWindow() in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\ApplicationLifetimes\ClassicDesktopStyleApplicationLifetime.cs:line 128
   at Avalonia.Controls.ApplicationLifetimes.ClassicDesktopStyleApplicationLifetime.Start(String[] args) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\ApplicationLifetimes\ClassicDesktopStyleApplicationLifetime.cs:line 118
   at Avalonia.ClassicDesktopStyleApplicationLifetimeExtensions.StartWithClassicDesktopLifetime[T](T builder, String[] args, ShutdownMode shutdownMode) in C:\DOWNLOADS\GitHub\Avalonia\src\Avalonia.Controls\ApplicationLifetimes\ClassicDesktopStyleApplicationLifetime.cs:line 209
   at Sandbox.Program.Main(String[] args) in C:\DOWNLOADS\GitHub\Avalonia\samples\Sandbox\Program.cs:line 7

To Reproduce

Sandbox

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
        x:Class="Sandbox.MainWindow">
    <ListBox BorderThickness="1">
        <ListBoxItem Content="Unselected"/>
        <ListBoxItem Content="Selected" IsSelected="True"/>
        <ListBoxItem Content="Disabled" IsEnabled="False"/>
    </ListBox>
</Window>

Expected behavior
No Exception

Desktop (please complete the following information):

  • OS: Windows 10
  • Version 0.10.12 and master
@munzili
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munzili commented Mar 3, 2022

Also got similar Problem with ItemsControl

   bei System.Collections.Generic.TreeSet`1.AddIfNotPresent(T item)
   bei System.Collections.Generic.SortedDictionary`2.Add(TKey key, TValue value)
   bei Avalonia.Controls.Generators.ItemContainerGenerator.Materialize(Int32 index, Object item)
   bei Avalonia.Controls.Presenters.ItemContainerSync.AddContainers(ItemsPresenterBase owner, Int32 index, IEnumerable items)
   bei Avalonia.Controls.Presenters.ItemContainerSync.<ItemsChanged>g__Add|0_0(<>c__DisplayClass0_0& )
   bei Avalonia.Controls.Presenters.ItemContainerSync.ItemsChanged(ItemsPresenterBase owner, IEnumerable items, NotifyCollectionChangedEventArgs e)
   bei Avalonia.Controls.Presenters.ItemVirtualizerNone.ItemsChanged(IEnumerable items, NotifyCollectionChangedEventArgs e)
   bei Avalonia.Controls.Presenters.ItemsPresenter.ItemsChanged(NotifyCollectionChangedEventArgs e)
   bei Avalonia.Controls.Presenters.ItemsPresenterBase.Avalonia.Controls.Presenters.IItemsPresenter.ItemsChanged(NotifyCollectionChangedEventArgs e)
   bei Avalonia.Controls.ItemsControl.ItemsCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
   bei Avalonia.Controls.ItemsControl.Avalonia.Controls.Utils.ICollectionChangedListener.PostChanged(INotifyCollectionChanged sender, NotifyCollectionChangedEventArgs e)
   bei Avalonia.Controls.Utils.CollectionChangedEventManager.Entry.<Avalonia.Utilities.IWeakEventSubscriber<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.OnEvent>g__Notify|6_0(INotifyCollectionChanged incc, NotifyCollectionChangedEventArgs args, List`1 listeners)
   bei Avalonia.Controls.Utils.CollectionChangedEventManager.Entry.<>c__DisplayClass6_0.<Avalonia.Utilities.IWeakEventSubscriber<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.OnEvent>b__1()
   bei Avalonia.Threading.JobRunner.RunJobs(Nullable`1 priority)
   bei Avalonia.Win32.Win32Platform.WndProc(IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam)
   bei Avalonia.Win32.Interop.UnmanagedMethods.DispatchMessage(MSG& lpmsg)
   bei Avalonia.Win32.Win32Platform.RunLoop(CancellationToken cancellationToken)
   bei Avalonia.Threading.Dispatcher.MainLoop(CancellationToken cancellationToken)
   bei Avalonia.Controls.ApplicationLifetimes.ClassicDesktopStyleApplicationLifetime.Start(String[] args)
   bei Avalonia.ClassicDesktopStyleApplicationLifetimeExtensions.StartWithClassicDesktopLifetime[T](T builder, String[] args, ShutdownMode shutdownMode)
   bei XXX.Program.<Main>d__6.MoveNext() in D:\XXX\Program.cs: Zeile77

@Tenjim
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Tenjim commented Jun 9, 2022 •
edited
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Hi Guys,

I have this same issue when using ListBox with VirtualizationMode simple.
There is just one case are similar than @wieslawsoltes sample. I'm using "IsSelected" Property and a binding on it.

And when you remove IsSelected on his sample. There is no ArgumentException.

@Whiletru3
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I have analyzed this bug.
The default behaviour of a ItemsControl has the AutoScrollToSelectedItem to true
This property, trigger the change ScrollIntoView on second element leading to the dictionary issue during MoveContainer.
Here is the commit description about the dictionnary : e686786

Use dictionary to track item containers.

Because even when virtualized we were still creating a list the size of
the Items collection to store the containers. Using Dictionary here
still isn't ideal - we'd ideally use some sort of sparse array but that
can be optimized later.

@grokys We are later now (+2200days) :)

As a workaround for now we can use AutoScrollToSelectedItem="False" in the ListBox :

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
        x:Class="Sandbox.MainWindow">
    <ListBox BorderThickness="1" AutoScrollToSelectedItem="False">
        <ListBoxItem Content="Unselected"/>
        <ListBoxItem Content="Selected" IsSelected="True"/>
        <ListBoxItem Content="Disabled" IsEnabled="False"/>
    </ListBox>
</Window>

@maxkatz6 maxkatz6 mentioned this issue Sep 17, 2022
Closed
@grokys grokys mentioned this issue Dec 13, 2022
Merged
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Refactor ItemsControl container generation and implement smooth virtualization AvaloniaUI/Avalonia
4 participants
@wieslawsoltes @Whiletru3 @Tenjim @munzili