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Can you help us solve crashes in DataGrid WPF?
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Geerts, Eric
0
Reputation points
We are experiencing crashes in particular environments on customer sites in our WPF application. The callstack points to the DataGrid control, which contains in these cases CheckBoxes which are ToggleButtons (callstack). Our codebase extends the DataGrid control but has been untouched since 2016 For some users of a particular customer this reproduces instantly and for others sometimes. Internally we don't have a repro nor do other customers crash. We don't formally support Automation in our WPF application but these customers may use Automation on their system nonetheless.
I've searched around and I found very similair callstacks originating from other controls than ToggleButton. From what I understand have these been fixed in .NET updates: https://developercommunity.visualstudio.com/t/vs-1602-crashes-opening-naming-style-window/546969 https://github.com/dotnet/wpf/issues/4279#issuecomment-1068216694 I've also tried the workaround mentioned in the latter link, but to no avail.
Callstack (Originally in Dutch)
System.ArgumentNullException: Value cannot be null. Parameter name: item
at System.Windows.Automation.Peers.DataGridItemAutomationPeer..ctor(Object item, DataGridAutomationPeer dataGridPeer)
at System.Windows.Automation.Peers.DataGridAutomationPeer.CreateItemAutomationPeer(Object item)
at System.Windows.Automation.Peers.ItemsControlAutomationPeer.GetChildrenCore()
at System.Windows.Automation.Peers.DataGridAutomationPeer.GetChildrenCore()
at System.Windows.Automation.Peers.AutomationPeer.EnsureChildren()
at System.Windows.Automation.Peers.AutomationPeer.GetChildren()
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)
at System.Windows.Automation.Peers.AutomationPeer.ValidateConnected(AutomationPeer connectedPeer)
at MS.Internal.Automation.ElementProxy.StaticWrap(AutomationPeer peer, AutomationPeer referencePeer)
at System.Windows.Automation.Peers.AutomationPeer.ProviderFromPeer(AutomationPeer peer)
at System.Windows.Automation.Peers.AutomationPeer.RaisePropertyChangedEvent(AutomationProperty property, Object oldValue, Object newValue)
at System.Windows.Automation.Peers.ToggleButtonAutomationPeer.RaiseToggleStatePropertyChangedEvent(Nullable`1 oldValue, Nullable`1 newValue)
at System.Windows.Controls.Primitives.ToggleButton.OnIsCheckedChanged(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.ClearValueCommon(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata)
at System.Windows.DependencyObject.ClearValue(DependencyProperty dp)
at System.Windows.Data.BindingOperations.ClearBinding(DependencyObject target, DependencyProperty dp)
at MyNameSpace.MyDataGridCellValue.BindCellValue(DataGridCell cell, FrameworkElement el)
in MyDataGridCellValue.cs:line 186
at MyDataGridCellValue.BindCellProperties(DataGridCell cell, FrameworkElement el)
in MyDataGridCellValue.cs:line 173
at MyNamespace.MyDataGrid.OnLoadingRow(DataGridRow dgRow)
in MyDataGrid.cs:line 1515
at MyNamespace.MyDataGrid.OnLoadingRow(DataGridRowEventArgs e)
in MyDataGrid.cs:line 1279
at System.Windows.Controls.DataGrid.PrepareContainerForItemOverride(DependencyObject element, Object item)
at System.Windows.Controls.ItemsControl.MS.Internal.Controls.IGeneratorHost.PrepareItemContainer(DependencyObject container, Object item)
at System.Windows.Controls.ItemContainerGenerator.System.Windows.Controls.Primitives.IItemContainerGenerator.PrepareItemContainer(DependencyObject container)
at System.Windows.Controls.VirtualizingStackPanel.InsertContainer(Int32 childIndex, UIElement container, Boolean isRecycled)
at System.Windows.Controls.VirtualizingStackPanel.AddContainerFromGenerator(Int32 childIndex, UIElement child, Boolean newlyRealized, Boolean isBeforeViewport)
at System.Windows.Controls.VirtualizingStackPanel.MeasureChild(IItemContainerGenerator& generator, IContainItemStorage& itemStorageProvider, IContainItemStorage& parentItemStorageProvider, Object& parentItem, Boolean& hasUniformOrAverageContainerSizeBeenSet, Double& computedUniformOrAverageContainerSize, Double& computedUniformOrAverageContainerPixelSize, Boolean& computedAreContainersUniformlySized, Boolean& hasAnyContainerSpanChanged, IList& items, Object& item, IList& children, Int32& childIndex, Boolean& visualOrderChanged, Boolean& isHorizontal, Size& childConstraint, Rect& viewport, VirtualizationCacheLength& cacheSize, VirtualizationCacheLengthUnit& cacheUnit, Boolean& foundFirstItemInViewport, Double& firstItemInViewportOffset, Size& stackPixelSize, Size& stackPixelSizeInViewport, Size& stackPixelSizeInCacheBeforeViewport, Size& stackPixelSizeInCacheAfterViewport, Size& stackLogicalSize, Size& stackLogicalSizeInViewport, Size& stackLogicalSizeInCacheBeforeViewport, Size& stackLogicalSizeInCacheAfterViewport, Boolean& mustDisableVirtualization, Boolean isBeforeFirstItem, Boolean isAfterFirstItem, Boolean isAfterLastItem, Boolean skipActualMeasure, Boolean skipGeneration, Boolean& hasBringIntoViewContainerBeenMeasured, Boolean& hasVirtualizingChildren)
at System.Windows.Controls.VirtualizingStackPanel.MeasureOverrideImpl(Size constraint, Nullable`1& lastPageSafeOffset, List`1& previouslyMeasuredOffsets, Nullable`1& lastPagePixelSize, Boolean remeasure)
at System.Windows.Controls.VirtualizingStackPanel.MeasureOverride(Size constraint)
at System.Windows.Controls.Primitives.DataGridRowsPresenter.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.ContextLayoutManager.UpdateLayout()
at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()
at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
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 numArgs, Delegate catchHandler)
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Windows Presentation Foundation
Windows Presentation Foundation
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Hui Liu-MSFT 47,021 Reputation points Microsoft Vendor2024-02-15T08:34:02.8833333+00:00 Hi,@Geerts, Eric. Welcome to Microsoft Q&A. What is the system environment and Visual Studio version where the problem lies? It seems to be related to the automation framework attempting to interact with the DataGrid control. Here are some steps you could take to troubleshoot and potentially resolve this issue:
Check for Null Values: The exception message indicates that a null value is being encountered where it's not expected. Review the code where the DataGridItemAutomationPeer is being instantiated to ensure that it's not receiving a null value for the item parameter.
Review Data Binding: The callstack also suggests that there might be an issue with data binding (MyDataGridCellValue.BindCellValue). Ensure that the data being bound to the DataGrid cells is correctly formatted and that there are no null values being passed to the binding.
Review Automation Implementation: Although you mentioned that you don't formally support automation in your application, the crash appears to be related to the automation framework attempting to interact with your DataGrid. Review any code or configurations related to automation to ensure that it's not inadvertently causing the crash.
Check for Environment Differences: Since the issue occurs only in certain environments, investigate any differences between the environments where the crash occurs and those where it doesn't. This could include differences in operating systems, installed software, or system configurations.
Update Dependencies: Ensure that all dependencies, including any third-party libraries or frameworks used by your application, are up to date. Sometimes, issues like this can be caused by outdated dependencies conflicting with the environment.
Monitor Memory Usage: Monitor the memory usage of your application, especially when interacting with the DataGrid control. A memory leak or excessive memory usage could potentially lead to unexpected behavior or crashes.
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Geerts, Eric 0 Reputation points
2024-03-14T10:28:51.9533333+00:00 Hi @Hui Liu-MSFT
Thank you for your reply.We will dive deeper into your mentioned suggestions.
Concerning the Automation mechanism, is it possible to suppress that behaviour entirely? The automation is not actively triggered by our own codebase and we are looking for suggestions so that this automation code won't be called at all.
If I remember correctly, our customer has some automation triggering process attached to our application. I had already implemented the earlier mentioned suggestion (https://github.com/dotnet/wpf/issues/4279#issuecomment-1068216694), but to no avail.
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