dynamisch hinzugefügt Datatemplate - Static für Converter kann nicht

Question

finden ich den folgenden Code bin mit dynamisch Spalten zu meinem Gridview hinzufügen:

public void AddGridViewColumns() 
{ 
    GridView view = (GridView)_myListView.View; 
    GridViewColumn column = BuildGridViewColumn(1); 
    view.Columns.Add(column); 
} 

public virtual GridViewColumn BuildGridViewColumn(int blockIndex) 
{ 
    string templateXaml = string.Format(
     @"<DataTemplate 
      xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation"" 
      xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml"" 
      xmlns:local=""clr-namespace:Pse.MyTest;assembly=MyTest""> 
      <DataTemplate.Resources> 
       <local:BlockToBrushConverter 
        x:Key=""_blockToBrushConverter"" /> 
      </DataTemplate.Resources> 
      <TextBlock 
       Style=""{{StaticResource _gridViewCenterItemStyle}}"" 
       Text=""{{Binding Path=Block{0}.ConditionLabel}}"" 
       Foreground=""{{Binding Path=Block{0}, Converter={{StaticResource _blockToBrushConverter}}}}"" /> 
     </DataTemplate>", 
     blockIndex); 
    System.Diagnostics.Debug.Print(templateXaml); 
    GridViewColumn column = new GridViewColumn(); 
    column.Header = string.Format("Block {0}", blockIndex); 
    column.CellTemplate = (DataTemplate)XamlReader.Parse(templateXaml); 
    return column; 
} 

Die Debug.Print Ergebnisse in:

<DataTemplate 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:local="clr-namespace:Pse.MyTest;assembly=MyTest"> 
    <DataTemplate.Resources> 
     <local:BlockToBrushConverter 
      x:Key="_blockToBrushConverter" /> 
    </DataTemplate.Resources> 
    <TextBlock 
     Style="{StaticResource _gridViewCenterItemStyle}" 
     Text="{Binding Path=Block1.ConditionLabel}" 
     Foreground="{Binding Path=Block1, Converter={StaticResource _blockToBrushConverter}}" /> 
</DataTemplate> 

Wenn ich es ausführe, sagt es, dass es _blockToBrushConverter nicht finden kann.

Die Ausnahme ist:

System.Windows.Markup.XamlParseException was unhandled 
    Message="Cannot find resource named '{_blockToBrushConverter}'. Resource names are case sensitive. Error at object 'System.Windows.Data.Binding' in markup file 'MyTest;component/SetupWindowDictionary.xaml' Line 23 Position 13." 
    Source="PresentationFramework" 
    LineNumber=23 
    LinePosition=13 
    NameContext="Foreground" 

Wenn ich das Forecolor Attribut zu entfernen, die XAML nur gut analysiert (und ich bekomme die erwarteten Ergebnisse). Es scheint, als ob der Konverter in DateTemplate.Resources enthalten ist, sollte garantieren, dass es gefunden wird, aber aus irgendeinem Grund ist es nicht.

Ich habe auch versucht, die Deklaration für meine Konverter-Ressource höher in der Struktur (auf die Fensterebene) zu verschieben, aber das hat auch nicht funktioniert. Es scheint in der Lage zu sein, "_gridViewCenterItemStyle" zu finden, aber aus irgendeinem Grund weigert es sich, den Konverter zu finden.

Irgendwelche Ideen sehr geschätzt.

---

Hier ist die gesamte Ausnahme mit Stack-Trace, falls es hilft:

System.Windows.Markup.XamlParseException was unhandled 
    Message="Cannot find resource named '{_blockToBrushConverter}'. Resource names are case sensitive. Error at object 'System.Windows.Data.Binding' in markup file 'MyTest;component/SetupWindowDictionary.xaml' Line 23 Position 13." 
    Source="PresentationFramework" 
    LineNumber=23 
    LinePosition=13 
    NameContext="Foreground" 
    StackTrace: 
     at System.Windows.Markup.XamlParseException.ThrowException(String message, Exception innerException, Int32 lineNumber, Int32 linePosition, Uri baseUri, XamlObjectIds currentXamlObjectIds, XamlObjectIds contextXamlObjectIds, Type objectType) 
     at System.Windows.Markup.XamlParseException.ThrowException(ParserContext parserContext, Int32 lineNumber, Int32 linePosition, String message, Exception innerException) 
     at System.Windows.Markup.BamlRecordReader.ThrowExceptionWithLine(String message, Exception innerException) 
     at System.Windows.Markup.BamlRecordReader.ThrowException(String id, String parameter) 
     at System.Windows.StaticResourceExtension.ProvideValueInternal(IBamlReader bamlReader, Object targetObject, Object targetProperty, Boolean allowDeferredReference) 
     at System.Windows.StaticResourceExtension.ProvideValue(IServiceProvider serviceProvider) 
     at System.Windows.Markup.BamlRecordReader.ProvideValueFromMarkupExtension(MarkupExtension markupExtension, Object obj, Object member) 
     at System.Windows.Markup.BamlRecordReader.BaseReadOptimizedMarkupExtension(Object element, Int16 attributeId, PropertyDefinition propertyDefinition, Object value) 
     at System.Windows.Markup.BamlRecordReader.ReadPropertyWithStaticResourceIdRecord(BamlPropertyWithStaticResourceIdRecord bamlPropertyWithStaticResourceIdRecord) 
     at System.Windows.Markup.BamlRecordReader.ReadRecord(BamlRecord bamlRecord) 
     at System.Windows.StyleHelper.LoadOptimizedTemplateContent(DependencyObject container, ParserContext parserContext, OptimizedTemplateContent optimizedTemplateContent, FrameworkTemplate frameworkTemplate, IComponentConnector componentConnector, IStyleConnector styleConnector, List`1 affectedChildren, UncommonField`1 templatedNonFeChildrenField) 
     at System.Windows.FrameworkTemplate.LoadContent(DependencyObject container, List`1 affectedChildren, UncommonField`1 templatedNonFeChildrenField) 
     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.GridViewRowPresenter.MeasureOverride(Size constraint) 
     at System.Windows.FrameworkElement.MeasureCore(Size availableSize) 
     at System.Windows.UIElement.Measure(Size availableSize) 
     at System.Windows.Controls.Border.MeasureOverride(Size constraint) 
     at System.Windows.FrameworkElement.MeasureCore(Size availableSize) 
     at System.Windows.UIElement.Measure(Size availableSize) 
     at System.Windows.Controls.Control.MeasureOverride(Size constraint) 
     at System.Windows.FrameworkElement.MeasureCore(Size availableSize) 
     at System.Windows.UIElement.Measure(Size availableSize) 
     at System.Windows.Controls.VirtualizingStackPanel.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.ItemsPresenter.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.ScrollContentPresenter.MeasureOverride(Size constraint) 
     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 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 System.Windows.Controls.ScrollViewer.MeasureOverride(Size constraint) 
     at System.Windows.FrameworkElement.MeasureCore(Size availableSize) 
     at System.Windows.UIElement.Measure(Size availableSize) 
     at System.Windows.Controls.Border.MeasureOverride(Size constraint) 
     at System.Windows.FrameworkElement.MeasureCore(Size availableSize) 
     at System.Windows.UIElement.Measure(Size availableSize) 
     at System.Windows.Controls.Control.MeasureOverride(Size constraint) 
     at System.Windows.FrameworkElement.MeasureCore(Size availableSize) 
     at System.Windows.UIElement.Measure(Size availableSize) 
     at System.Windows.Controls.Grid.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.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, Boolean isSingleParameter) 
     at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) 
     at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) 
     at System.Windows.Threading.DispatcherOperation.InvokeImpl() 
     at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state) 
     at System.Threading.ExecutionContext.runTryCode(Object userData) 
     at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData) 
     at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) 
     at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 
     at System.Windows.Threading.DispatcherOperation.Invoke() 
     at System.Windows.Threading.Dispatcher.ProcessQueue() 
     at System.Windows.Threading.Dispatcher.WndProcHook(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, Boolean isSingleParameter) 
     at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) 
     at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) 
     at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter) 
     at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg) 
     at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam) 
     at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg) 
     at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame) 
     at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame) 
     at System.Windows.Threading.Dispatcher.Run() 
     at System.Windows.Application.RunDispatcher(Object ignore) 
     at System.Windows.Application.RunInternal(Window window) 
     at System.Windows.Application.Run(Window window) 
     at System.Windows.Application.Run() 
     at Pse.TestExperiment.App.Main() in C:\Documents and Settings\Daniel Manes\My Documents\Projects\Cmd21\Team Map Experiment 2\Solution\TestExperiment\obj\Debug\App.g.cs:line 0 
     at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args) 
     at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) 
     at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() 
     at System.Threading.ThreadHelper.ThreadStart_Context(Object state) 
     at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 
     at System.Threading.ThreadHelper.ThreadStart() 
    InnerException: 

EDIT:

Problem gelöst: Ich habe eine Suche durch mein ganzes Projekt und bemerkte ich eine hatte zusätzliche Kopie der BlockToBrushConverter-Ressourcendeklaration mit demselben x: Geben Sie einen Schlüssel in eines meiner Ressourcenwörterbücher ein. Sobald ich die Duplizierung beseitigt hatte, verschwand das Problem.

Answer 1

Nur für den Fall, dass jemand anderes sich diese Frage einmal anschaut, stellt sich heraus, dass der Code, den ich oben in dieser Frage vorgestellt habe, tatsächlich funktioniert. Der Fehler war, dass ich die folgende Erklärung an anderer Stelle in meiner XAML hatte:

<local:BlockToBrushConverter 
    x:Key="_blockToBrushConverter" /> 

Ich glaube, diese Vervielfältigung von der Ressource verhindert lokal für die dynamische Datatemplate erklärt wird (es ist nicht eine Ressource mit dem gleichen Namen erstellen konnte zweimal innerhalb von der gleiche Kontext).

Eine Sache, die für mich nicht gelöst ist, warum einige StaticResources lokal deklariert werden müssen, während andere (wie die _gridViewCenterItemStyle StaticResource) höher in der Struktur (wie auf der Fensterebene) ohne ein Problem deklariert werden können.