Markup.IStyle.Connector.Connect error on binding in WPF

c#, data-binding, wpf

Solution

Most likely it is because of nested templates:

CellTemplate -> `DataTemplate` -> ... -> TreeView -> TreeView.ItemTemplate -> `DataTemplate`

Quoting this:

This bug requires a Template in a Template. A good way to look at this problem “Templating is like parentheses, quoting parentheses” the Template XAML is not created but saved and run later. The bug is therefore: We have a problem with nested parentheses.

In the sample:

<Grid>
    <ListBox ItemsSource="{StaticResource Data}" >
        <ListBox.ItemTemplate>
            <DataTemplate>
                <ListBox ItemsSource="{Binding .}">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding .}" Width="30"
                                     Loaded="TextBlock_Loaded"
                                     Style="{StaticResource TextBlockStyle}" />
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>
</Grid>

The inner template is still `quoted` when the outer template is applied. Yet we still call IStyleConnector.Connect() for all the XAML (we don’t stop when we hit the `inner parentheses/quote`) and there is no TextBlock instance so we crash.

Weirdness happens with the repro because of optimized template sharing. For example if you remove the:

Style="{StaticResource TextBlockStyle}"

The bug goes away because the TextBlock becomes `sharable` in the Template optimizer.

`WorkAround:`

The best work around is move the inner template to a resource.

Try move your `TreeView.ItemTemplate` in resource.

Problem

Good time. I have a problem with data binding in WPF. If i use binding: ``` <TextBlock Text="{Binding Key}" TextTrimming="CharacterEllipsis" MaxWidth="{Binding ActualWidth, RelativeSource={RelativeSource AncestorType={x:Type Expander}}, Converter={StaticResource string_cutter_width}}"/> ``` in code below I have a `Markup.IStyle.Connector.Connect` error on some computers. I can't understand why. If you met such behavior or have some ideas about it. PLEASE SHARE. ``` <DataGridTemplateColumn Header="{x:Static res:Resources.status_col_header}" Width="1*"> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <DataTemplate.Resources> <local:Localizer2 x:Key="Localizer2" /> </DataTemplate.Resources> <Expander Header="{Binding status.Text, Converter={StaticResource Localizer2}}" MouseEnter="Expander_MouseEnter" Tag="{Binding}"> <TreeView x:Name="GTree" ItemsSource="{Binding status.files}" ScrollViewer.HorizontalScrollBarVisibility="Hidden"> <TreeView.ItemTemplate> <DataTemplate> <StackPanel Orientation="Horizontal" ClipToBounds="False" IsHitTestVisible="true" Margin="1"> <StackPanel Orientation="Vertical"> <StackPanel.Resources> <local:string_cutter_width x:Key="string_cutter_width" /> </StackPanel.Resources> <TextBlock Text="{Binding Key}" TextTrimming="CharacterEllipsis" MaxWidth="{Binding ActualWidth, RelativeSource={RelativeSource AncestorType={x:Type Expander}}, Converter={StaticResource string_cutter_width}}"/> <TextBlock Text="{Binding Value}" TextTrimming="CharacterEllipsis" MaxWidth="{Binding ActualWidth, RelativeSource={RelativeSource AncestorType={x:Type Expander}}, Converter={StaticResource string_cutter_width}}"/>  </StackPanel > <StackPanel Orientation="Vertical" HorizontalAlignment="Right" VerticalAlignment="Center"> <StackPanel.Resources> <local:del_label_converter x:Key="del_label_converter" /> </StackPanel.Resources>  <Image Source="Resources\delete_16.png" Stretch="UniformToFill" PreviewMouseUp="Image_MouseUp" Width="16" Height="16" Tag="{Binding}"/> </StackPanel> </StackPanel> </DataTemplate> </TreeView.ItemTemplate> </TreeView> </Expander> </DataTemplate> </DataGridTemplateColumn.CellTemplate> </DataGridTemplateColumn> </DataGrid.Columns> <DataGrid.ContextMenu> <ContextMenu> <MenuItem Header="Проверка подключения CamDrive" Click="MenuItem_Click" IsEnabled="{Binding Path=camdrive_can_be_chk_manually}"/>  </ContextMenu> </DataGrid.ContextMenu> </DataGrid> ``` call stack: ``` в Camdrive.UpgradeTools.MainWindow.System.Windows.Markup.IStyleConnector.Connect(Int32 connectionId, Object target) в c:\Develop\Camdrive.Utils\Camdrive.UpgradeTools\Camdrive.UpgradeTools\MainWindow.xaml:строка 75 в System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlReader templateReader, XamlObjectWriter currentWriter) в System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlObjectWriter objectWriter) в System.Windows.FrameworkTemplate.LoadOptimizedTemplateContent(DependencyObject container, IComponentConnector componentConnector, IStyleConnector styleConnector, List`1 affectedChildren, UncommonField`1 templatedNonFeChildrenField) в System.Windows.FrameworkTemplate.LoadContent(DependencyObject container, List`1 affectedChildren) в System.Windows.StyleHelper.ApplyTemplateContent(UncommonField`1 dataField, DependencyObject container, FrameworkElementFactory templateRoot, Int32 lastChildIndex, HybridDictionary childIndexFromChildID, FrameworkTemplate frameworkTemplate) в System.Windows.FrameworkTemplate.ApplyTemplateContent(UncommonField`1 templateDataField, FrameworkElement container) в System.Windows.FrameworkElement.ApplyTemplate() в System.Windows.FrameworkElement.MeasureCore(Size availableSize) в System.Windows.UIElement.Measure(Size availableSize) в MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint) в System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint) в System.Windows.FrameworkElement.MeasureCore(Size availableSize) в System.Windows.UIElement.Measure(Size availableSize) в System.Windows.Controls.Border.MeasureOverride(Size constraint) в System.Windows.FrameworkElement.MeasureCore(Size availableSize) в System.Windows.UIElement.Measure(Size availableSize) в System.Windows.Controls.Control.MeasureOverride(Size constraint) в System.Windows.Controls.DataGridCell.MeasureOverride(Size constraint) в System.Windows.FrameworkElement.MeasureCore(Size availableSize) в System.Windows.UIElement.Measure(Size availableSize) в System.Windows.Controls.DataGridCellsPanel.MeasureChild(UIElement child, Size constraint) в System.Windows.Controls.DataGridCellsPanel.GenerateChild(IItemContainerGenerator generator, Size constraint, DataGridColumn column, Int32& childIndex, Size& childSize) в System.Windows.Controls.DataGridCellsPanel.GenerateChildren(IItemContainerGenerator generator, Int32 startIndex, Int32 endIndex, Size constraint) в System.Windows.Controls.DataGridCellsPanel.GenerateAndMeasureChildrenForRealizedColumns(Size constraint) в System.Windows.Controls.DataGridCellsPanel.MeasureOverride(Size constraint) в System.Windows.FrameworkElement.MeasureCore(Size availableSize) в System.Windows.UIElement.Measure(Size availableSize) в MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint) в System.Windows.Controls.ItemsPresenter.MeasureOverride(Size constraint) в System.Windows.FrameworkElement.MeasureCore(Size availableSize) в System.Windows.UIElement.Measure(Size availableSize) в System.Windows.Controls.Control.MeasureOverride(Size constraint) в System.Windows.Controls.Primitives.DataGridCellsPresenter.MeasureOverride(Size availableSize) в System.Windows.FrameworkElement.MeasureCore(Size availableSize) в System.Windows.UIElement.Measure(Size availableSize) в System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV) в System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV) в System.Windows.Controls.Grid.MeasureOverride(Size constraint) в System.Windows.FrameworkElement.MeasureCore(Size availableSize) в System.Windows.UIElement.Measure(Size availableSize) в System.Windows.Controls.Border.MeasureOverride(Size constraint) в System.Windows.FrameworkElement.MeasureCore(Size availableSize) в System.Windows.UIElement.Measure(Size availableSize) в System.Windows.Controls.Control.MeasureOverride(Size constraint) в System.Windows.FrameworkElement.MeasureCore(Size availableSize) в System.Windows.UIElement.Measure(Size availableSize) в System.Windows.Controls.VirtualizingStackPanel.MeasureOverride(Size constraint) в System.Windows.Controls.Primitives.DataGridRowsPresenter.MeasureOverride(Size constraint) в System.Windows.FrameworkElement.MeasureCore(Size availableSize) в System.Windows.UIElement.Measure(Size availableSize) в System.Windows.ContextLayoutManager.UpdateLayout() в System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg) в System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork() в System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks() в System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget) в System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget) в System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) в MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler) в System.Windows.Threading.DispatcherOperation.InvokeImpl() в System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state) в System.Threading.ExecutionContext.runTryCode(Object userData) в System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData) в System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) в System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx) в System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) в System.Windows.Threading.DispatcherOperation.Invoke() в System.Windows.Threading.Dispatcher.ProcessQueue() в System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) в MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) в MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) в System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) в MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler) в System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs) в MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam) в MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg) в System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame) в System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame) в System.Windows.Application.RunDispatcher(Object ignore) в System.Windows.Application.RunInternal(Window window) в System.Windows.Application.Run(Window window) в System.Windows.Application.Run() в Camdrive.UpgradeTools.App.Main() в C:\Develop\Camdrive.Utils\Camdrive.UpgradeTools\Camdrive.UpgradeTools\obj\x86\Debug\App.g.cs:строка 0 в System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args) в System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) в Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() в System.Threading.ThreadHelper.ThreadStart_Context(Object state) в System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx) в System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) в System.Threading.ThreadHelper.ThreadStart() ```

Original source