Hi,

using XamDataGrid I get the following error: "Recursive call to Automation Peer API is not valid"

What I can say at the moment is, that this happens only on some Win XP machines.

What I do is the following:

During runtime I add a new tab to XamTabControl.
The content of that tab is a view containing a XamDataGrid.

Stacktrace:

at System.Windows.Markup.XamlReader.RewrapException(Exception e, Uri baseUri)  at System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlReader templateReader, XamlObjectWriter currentWriter)  at System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlObjectWriter objectWriter)  at System.Windows.FrameworkTemplate.LoadOptimizedTemplateContent(DependencyObject container, IComponentConnector componentConnector, IStyleConnector styleConnector, List`1 affectedChildren, UncommonField`1 templatedNonFeChildrenField)  at System.Windows.FrameworkTemplate.LoadContent(DependencyObject container, List`1 affectedChildren)  at System.Windows.StyleHelper.ApplyTemplateContent(UncommonField`1 dataField, DependencyObject container, FrameworkElementFactory templateRoot, Int32 lastChildIndex, HybridDictionary childIndexFromChildID, FrameworkTemplate frameworkTemplate)  at System.Windows.FrameworkTemplate.ApplyTemplateContent(UncommonField`1 templateDataField, FrameworkElement container)  at System.Windows.FrameworkElement.ApplyTemplate()  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)  at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)  at System.Windows.Controls.Grid.MeasureOverride(Size constraint)  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at Infragistics.Windows.Controls.CardPanel.MeasureOverride(Size availableSize)  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at System.Windows.Controls.Control.MeasureOverride(Size constraint)  at Infragistics.Windows.DataPresenter.DataItemPresenter.MeasureOverride(Size availableSize)  at Infragistics.Windows.DataPresenter.CellValuePresenter.MeasureOverride(Size availableSize)  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at Infragistics.Windows.DataPresenter.VirtualizingDataRecordCellPanel.TryGetPreferredExtent(FieldLayoutItemBase fieldLayoutItem, Boolean cell, Boolean width, Double& extent)  at Infragistics.Windows.DataPresenter.CellLayoutItem.GetSize(LayoutItemSize size)  at Infragistics.Windows.DataPresenter.LayoutItem.Infragistics.Controls.Layouts.Primitives.ILayoutItem.get_PreferredSize()  at Infragistics.Controls.Layouts.Primitives.GridBagLayoutManager.GridBagConstraintCache..ctor(ILayoutItem item, IGridBagConstraint gc)  at Infragistics.Controls.Layouts.Primitives.GridBagLayoutManager.GetGridBagCacheHelper(GridBagConstraintCache[]& tmpGccArr)  at Infragistics.Controls.Layouts.Primitives.GridBagLayoutManager.CalculateGridBagLayout()  at Infragistics.Controls.Layouts.Primitives.GridBagLayoutManager.CalculatePreferredSize(ILayoutContainer container, Object containerContext)  at Infragistics.Windows.DataPresenter.FieldGridBagLayoutManager.CalculatePreferredSize()  at Infragistics.Windows.DataPresenter.VirtualizingDataRecordCellPanel.MeasureOverride(Size availableSize)  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)  at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at Infragistics.Windows.Controls.CardPanel.MeasureOverride(Size availableSize)  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at System.Windows.Controls.Control.MeasureOverride(Size constraint)  at Infragistics.Windows.DataPresenter.DataRecordCellArea.MeasureOverride(Size availableSize)  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at System.Windows.Controls.DockPanel.MeasureOverride(Size constraint)  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)  at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)  at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)  at System.Windows.Controls.Grid.MeasureOverride(Size constraint)  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at Infragistics.Windows.Controls.CardPanel.MeasureOverride(Size availableSize)  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at System.Windows.Controls.Control.MeasureOverride(Size constraint)  at Infragistics.Windows.DataPresenter.RecordPresenter.MeasureOverride(Size availableSize)  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at Infragistics.Windows.DataPresenter.GridViewPanelFlat.GenerationCache.GenerateNextElement(Boolean isHeader)  at Infragistics.Windows.DataPresenter.GridViewPanelFlat.GenerationCache.GenerateRecordsHelper()  at Infragistics.Windows.DataPresenter.GridViewPanelFlat.GenerationCache.GenerateTopFixedRecords()  at Infragistics.Windows.DataPresenter.GridViewPanelFlat.GenerationCache.GenerateAllRecords()  at Infragistics.Windows.DataPresenter.GridViewPanelFlat.MeasureOverride(Size availableSize)  at System.Windows.FrameworkElement.MeasureCore(Size availableSize)  at System.Windows.UIElement.Measure(Size availableSize)  at System.Windows.ContextLayoutManager.UpdateLayout()  at System.Windows.UIElement.UpdateLayout()  at Infragistics.Windows.Automation.Peers.XamTabControlAutomationPeer.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 System.Windows.Automation.Peers.AutomationPeer.AutomationPeerFromInputElement(IInputElement focusedElement)  at System.Windows.Automation.Peers.AutomationPeer.RaiseFocusChangedEventHelper(IInputElement newFocus)  at System.Windows.Input.KeyboardDevice.ChangeFocus(DependencyObject focus, Int32 timestamp)  at System.Windows.Input.KeyboardDevice.TryChangeFocus(DependencyObject newFocus, IKeyboardInputProvider keyboardInputProvider, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)  at System.Windows.Input.KeyboardDevice.Focus(DependencyObject focus, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)  at System.Windows.Input.KeyboardDevice.Focus(IInputElement element)  at System.Windows.UIElement.Focus()  at System.Windows.Controls.TabItem.SetFocus()  at System.Windows.Controls.TabControl.OnSelectionChanged(SelectionChangedEventArgs e)  at Infragistics.Windows.Controls.XamTabControl.OnSelectionChanged(SelectionChangedEventArgs e)  at System.Windows.Controls.Primitives.Selector.InvokeSelectionChanged(List`1 unselectedItems, List`1 selectedItems)  at System.Windows.Controls.Primitives.Selector.SelectionChanger.End()  at System.Windows.Controls.Primitives.Selector.SetSelectedHelper(Object item, FrameworkElement UI, Boolean selected)  at System.Windows.Controls.Primitives.Selector.NotifyIsSelectedChanged(FrameworkElement container, Boolean selected, RoutedEventArgs e)  at System.Windows.Controls.Primitives.Selector.OnSelected(Object sender, RoutedEventArgs e)  at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)  at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)  at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)  at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)  at Infragistics.Windows.Controls.TabItemEx.OnSelected(RoutedEventArgs e)  at System.Windows.Controls.TabItem.OnIsSelectedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)  at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)  at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)  at Infragistics.Windows.Controls.TabItemEx.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.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)  at System.Windows.DependencyObject.SetCurrentValueInternal(DependencyProperty dp, Object value)  at System.Windows.Controls.TabItem.OnPreviewGotKeyboardFocus(KeyboardFocusChangedEventArgs e)  at Infragistics.Windows.Controls.TabItemEx.OnPreviewGotKeyboardFocus(KeyboardFocusChangedEventArgs e)  at System.Windows.UIElement.OnPreviewGotKeyboardFocusThunk(Object sender, KeyboardFocusChangedEventArgs e)  at System.Windows.Input.KeyboardFocusChangedEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)  at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)  at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)  at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)  at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)  at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)  at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)  at System.Windows.Input.InputManager.ProcessStagingArea()  at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)  at System.Windows.Input.KeyboardDevice.TryChangeFocus(DependencyObject newFocus, IKeyboardInputProvider keyboardInputProvider, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)  at System.Windows.Input.KeyboardDevice.Focus(DependencyObject focus, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)  at System.Windows.Input.KeyboardDevice.Focus(IInputElement element)  at System.Windows.UIElement.Focus()  at Roesberg.WebDocumentation.UI.Views.WebDokuNavigationView.OpenDocumentInTab(WebDokuDocument document, TabItemEx tabItem) in d:\Entwickl\RCC\V1\RCC\Roesberg.WebDocumentation.UI\Views\WebDokuNavigationView.xaml.cs:line 337  at Roesberg.WebDocumentation.UI.Views.WebDokuNavigationView._vm_OpenWebDokuDocument(Object sender, DocumentEventArgs e) in d:\Entwickl\RCC\V1\RCC\Roesberg.WebDocumentation.UI\Views\WebDokuNavigationView.xaml.cs:line 288  at Roesberg.WebDocumentation.Core.ViewModels.WebDokuNavigationViewModel.OnOpenWebDokuDocument(DocumentEventArgs args) in d:\Entwickl\RCC\V1\RCC\Roesberg.WebDocumentation.Core\ViewModels\WebDokuNavigationViewModel.cs:line 629  at Roesberg.WebDocumentation.Core.ViewModels.WebDokuNavigationViewModel.OpenDocument(CboNodes webDokuNode) in d:\Entwickl\RCC\V1\RCC\Roesberg.WebDocumentation.Core\ViewModels\WebDokuNavigationViewModel.cs:line 945  at Roesberg.WebDocumentation.Core.ViewModels.WebDokuNavigationViewModel.TreeVM_ItemDoubleClicked(Object sender, RBTreeNodeDoubleClickedEventArgs e) in d:\Entwickl\RCC\V1\RCC\Roesberg.WebDocumentation.Core\ViewModels\WebDokuNavigationViewModel.cs:line 857  at Roesberg.TreePropSheet.Core.ViewModels.RBTree.RBTreeListViewViewModel.OnNodeDoubleClicked(RBTreeNode node) in d:\Entwickl\RCC\V1\RCC\Roesberg.TreePropSheet.Core\ViewModels\RBTree\RBTreeListViewViewModel.cs:line 3345  at Roesberg.TreePropSheet.Core.ViewModels.RBTree.RBTreeListViewViewModel.NodeDoubleClickedHandler(RBTreeNode node) in d:\Entwickl\RCC\V1\RCC\Roesberg.TreePropSheet.Core\ViewModels\RBTree\RBTreeListViewViewModel.cs:line 3331  at Roesberg.TreePropSheet.UI.Controls.RBTreeList.TreeListItem.OnMouseDoubleClick(MouseButtonEventArgs e) in d:\Entwickl\RCC\V1\RCC\Roesberg.TreePropSheet.UI\Controls\RBTreeList\TreeListItem.cs:line 74  at System.Windows.Controls.Control.HandleDoubleClick(Object sender, MouseButtonEventArgs e)  at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)  at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)  at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)  at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)  at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)  at System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e)  at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)  at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)  at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)  at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)  at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)  at System.Windows.ContentElement.RaiseTrustedEvent(RoutedEventArgs args)  at System.Windows.Input.InputManager.ProcessStagingArea()  at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)  at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)  at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)  at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)  at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)  at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)  at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)  at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)  at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

As a workaround I had to do 2 things:

1. Create an own control inheriting from XamDataGrid:  

 public class DataGridNonAutomation : XamDataGrid {
    protected override AutomationPeer OnCreateAutomationPeer() {
      return new EmptyAutomationPeer(this);
    }
  }

public class EmptyAutomationPeer : FrameworkElementAutomationPeer {
    public EmptyAutomationPeer(FrameworkElement owner) : base(owner) { }
    protected override List<AutomationPeer> GetChildrenCore() {
      return new List<AutomationPeer>();
    }
  }

2. Remove the following FieldSetting: AllowRecordFiltering="True"

 Here's the resulting XAML:

<controls:DataGridNonAutomation x:Name="PropertyGrid" 
                                        DataSource="{Binding DocumentData}"
                                        Theme="Office2k7Black"
                                        GroupByAreaLocation="AboveDataArea"
                                        ScrollingMode="Immediate">
 
                
 <controls:DataGridNonAutomation.FieldLayouts>
  <igDP:FieldLayout>
    <igDP:Field Name="Caption" Visibility="Visible" Width="220" Label="Bezeichnung" Localization.Attributes="Label(Text Readable Modifiable)"/>
      <igDP:Field Name="Value" Visibility="Visible" Width="*" Label="Wert"  Localization.Attributes="Label(Text Readable Modifiable)"/>
      <igDP:Field Name="Group" Visibility="Visible" Width="*" Label="Gruppe"  Localization.Attributes="Label(Text Readable Modifiable)"/>
      <igDP:FieldLayout.SortedFields>
      <igDP:FieldSortDescription IsGroupBy="True" Direction="Ascending" FieldName="Group" />
      igDP:FieldLayout.SortedFields>                     
 </igDP:FieldLayout>
 </controls:DataGridNonAutomation.FieldLayouts>
 <controls:DataGridNonAutomation.FieldSettings>
 <igDP:FieldSettings AllowEdit="False" CellClickAction="SelectRecord" AllowGroupBy="True" CellVisibilityWhenGrouped="Collapsed" />
 <controls:DataGridNonAutomation.FieldSettings>
 <controls:DataGridNonAutomation.FieldLayoutSettings>
 <igDP:FieldLayoutSettings HighlightAlternateRecords="False" AllowDelete="False" HeaderPlacementInGroupBy="OnTopOnly"/>
 </controls:DataGridNonAutomation.FieldLayoutSettings>
</controls:DataGridNonAutomation>

This works but I want the RecordFiltering working and don't want to have to override some or all controls to be able to override OnCreateAutomationPeer().

Maybe the post http://stackoverflow.com/questions/4017786/wpf-recursive-call-to-automation-peer-api-is-not-valid could gives a hint describing a problem with a combobox withing the grid.
The record filter uses a XamComboBox...

Please have a look at it and give me a short feedback what to do.
Sorry, but I can't give a small example project for reproducing the error. But maybe the stacktrace helps.

Best regards
cew3