How to: Build Dock UI According to MVVM Pattern Using LayoutAdapter

Question Comments

[C#]
System.NullReferenceExceptionwasunhandled HResult=-2147467261 Message=Objectreferencenotsettoaninstanceofanobject. Source=PresentationFramework StackTrace:    atSystem.Windows.ResourceDictionary.GetKeyValue(KeyRecordkey,IServiceProviderserviceProvider)    atSystem.Windows.ResourceDictionary.SetKeys(IList`1 keyCollection,IServiceProviderserviceProvider)    atSystem.Windows.ResourceDictionary.SetDeferrableContent(DeferrableContentdeferrableContent)    atSystem.Windows.Baml2006.WpfSharedBamlSchemaContext.<>c.<Create_BamlProperty_ResourceDictionary_DeferrableContent>b__297_0(Objecttarget,Objectvalue)    atSystem.Windows.Baml2006.WpfKnownMemberInvoker.SetValue(Objectinstance,Objectvalue)    atMS.Internal.Xaml.Runtime.ClrObjectRuntime.SetValue(XamlMembermember,Objectobj,Objectvalue)    atMS.Internal.Xaml.Runtime.ClrObjectRuntime.SetValue(Objectinst,XamlMemberproperty,Objectvalue)    atSystem.Xaml.XamlObjectWriter.Logic_ApplyPropertyValue(ObjectWriterContextctx,XamlMemberprop,Objectvalue,BooleanonParent)    atSystem.Xaml.XamlObjectWriter.Logic_DoAssignmentToParentProperty(ObjectWriterContextctx)    atSystem.Xaml.XamlObjectWriter.WriteEndMember()    atSystem.Xaml.XamlWriter.WriteNode(XamlReaderreader)    atSystem.Windows.Markup.WpfXamlLoader.TransformNodes(XamlReaderxamlReader,XamlObjectWriterxamlWriter,BooleanonlyLoadOneNode,BooleanskipJournaledProperties,BooleanshouldPassLineNumberInfo,IXamlLineInfoxamlLineInfo,IXamlLineInfoConsumerxamlLineInfoConsumer,XamlContextStack`1 stack,IStyleConnectorstyleConnector)    atSystem.Windows.Markup.WpfXamlLoader.Load(XamlReaderxamlReader,IXamlObjectWriterFactorywriterFactory,BooleanskipJournaledProperties,ObjectrootObject,XamlObjectWriterSettingssettings,UribaseUri)    atSystem.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReaderxamlReader,BooleanskipJournaledProperties,ObjectrootObject,XamlAccessLevelaccessLevel,UribaseUri)    atSystem.Windows.Markup.XamlReader.LoadBaml(Streamstream,ParserContextparserContext,Objectparent,BooleancloseStream)    atSystem.Windows.Application.LoadBamlStreamWithSyncInfo(Streamstream,ParserContextpc)    atMS.Internal.AppModel.AppModelKnownContentFactory.BamlConverter(Streamstream,UribaseUri,BooleancanUseTopLevelBrowser,BooleansandboxExternalContent,BooleanallowAsync,BooleanisJournalNavigation,XamlReader&asyncObjectConverter)    atMS.Internal.AppModel.MimeObjectFactory.GetObjectAndCloseStream(Streams,ContentTypecontentType,UribaseUri,BooleancanUseTopLevelBrowser,BooleansandboxExternalContent,BooleanallowAsync,BooleanisJournalNavigation,XamlReader&asyncObjectConverter)    atSystem.Windows.ResourceDictionary.set_Source(Urivalue)    atSystem.Windows.Baml2006.WpfSharedBamlSchemaContext.<>c.<Create_BamlProperty_ResourceDictionary_Source>b__342_0(Objecttarget,Objectvalue)    atSystem.Windows.Baml2006.WpfKnownMemberInvoker.SetValue(Objectinstance,Objectvalue)    atMS.Internal.Xaml.Runtime.ClrObjectRuntime.SetValue(XamlMembermember,Objectobj,Objectvalue)    atMS.Internal.Xaml.Runtime.ClrObjectRuntime.SetValue(Objectinst,XamlMemberproperty,Objectvalue)    atMS.Internal.Xaml.Runtime.PartialTrustTolerantRuntime.SetValue(Objectobj,XamlMemberproperty,Objectvalue)    atSystem.Xaml.XamlObjectWriter.Logic_ApplyPropertyValue(ObjectWriterContextctx,XamlMemberprop,Objectvalue,BooleanonParent)    atSystem.Xaml.XamlObjectWriter.Logic_DoAssignmentToParentProperty(ObjectWriterContextctx)    atSystem.Xaml.XamlObjectWriter.Logic_AssignProvidedValue(ObjectWriterContextctx)    atSystem.Xaml.XamlObjectWriter.WriteEndObject()    atSystem.Xaml.XamlWriter.WriteNode(XamlReaderreader)    atSystem.Xaml.XamlServices.Transform(XamlReaderxamlReader,XamlWriterxamlWriter,BooleancloseWriter)    atSystem.Xaml.XamlServices.Transform(XamlReaderxamlReader,XamlWriterxamlWriter)    atSystem.Windows.SystemResources.ResourceDictionaries.LoadDictionary(Assemblyassembly,StringassemblyName,StringresourceName,BooleanisTraceEnabled)    atSystem.Windows.SystemResources.ResourceDictionaries.LoadGenericDictionary(BooleanisTraceEnabled)    atSystem.Windows.SystemResources.FindDictionaryResource(Objectkey,TypetypeKey,ResourceKeyresourceKey,BooleanisTraceEnabled,BooleanallowDeferredResourceReference,BooleanmustReturnDeferredResourceReference,Boolean&canCache)    atSystem.Windows.SystemResources.FindResourceInternal(Objectkey,BooleanallowDeferredResourceReference,BooleanmustReturnDeferredResourceReference)    atSystem.Windows.StyleHelper.GetThemeStyle(FrameworkElementfe,FrameworkContentElementfce)    atSystem.Windows.FrameworkElement.UpdateThemeStyleProperty()    atSystem.Windows.FrameworkElement.OnInitialized(EventArgse)    atSystem.Windows.FrameworkElement.TryFireInitialized()    atSystem.Windows.FrameworkElement.EndInit()    atSystem.Windows.Controls.ItemsControl.EndInit()    atMS.Internal.Xaml.Runtime.ClrObjectRuntime.InitializationGuard(XamlTypexamlType,Objectobj,Booleanbegin)    atSystem.Xaml.XamlObjectWriter.Logic_EndInit(ObjectWriterContextctx)    atSystem.Xaml.XamlObjectWriter.WriteEndObject()    atSystem.Xaml.XamlWriter.WriteNode(XamlReaderreader)    atSystem.Windows.FrameworkTemplate.LoadTemplateXaml(XamlReadertemplateReader,XamlObjectWritercurrentWriter)    atSystem.Windows.FrameworkTemplate.LoadTemplateXaml(XamlObjectWriterobjectWriter)    atSystem.Windows.FrameworkTemplate.LoadOptimizedTemplateContent(DependencyObjectcontainer,IComponentConnectorcomponentConnector,IStyleConnectorstyleConnector,List`1 affectedChildren,UncommonField`1 templatedNonFeChildrenField)    atSystem.Windows.FrameworkTemplate.LoadContent(DependencyObjectcontainer,List`1 affectedChildren)    atSystem.Windows.StyleHelper.ApplyTemplateContent(UncommonField`1 dataField,DependencyObjectcontainer,FrameworkElementFactorytemplateRoot,Int32lastChildIndex,HybridDictionarychildIndexFromChildID,FrameworkTemplateframeworkTemplate)    atSystem.Windows.FrameworkTemplate.ApplyTemplateContent(UncommonField`1 templateDataField,FrameworkElementcontainer)    atSystem.Windows.FrameworkElement.ApplyTemplate()    atSystem.Windows.FrameworkElement.MeasureCore(SizeavailableSize)    atSystem.Windows.UIElement.Measure(SizeavailableSize)    atSystem.Windows.Controls.Grid.MeasureOverride(Sizeconstraint)    atSystem.Windows.FrameworkElement.MeasureCore(SizeavailableSize)    atSystem.Windows.UIElement.Measure(SizeavailableSize)    atMS.Internal.Helper.MeasureElementWithSingleChild(UIElementelement,Sizeconstraint)    atSystem.Windows.Controls.ContentPresenter.MeasureOverride(Sizeconstraint)    atSystem.Windows.FrameworkElement.MeasureCore(SizeavailableSize)    atSystem.Windows.UIElement.Measure(SizeavailableSize)    atSystem.Windows.Documents.AdornerDecorator.MeasureOverride(Sizeconstraint)    atSystem.Windows.FrameworkElement.MeasureCore(SizeavailableSize)    atSystem.Windows.UIElement.Measure(SizeavailableSize)    atSystem.Windows.Controls.Border.MeasureOverride(Sizeconstraint)    atSystem.Windows.FrameworkElement.MeasureCore(SizeavailableSize)    atSystem.Windows.UIElement.Measure(SizeavailableSize)    atSystem.Windows.Window.MeasureOverrideHelper(Sizeconstraint)    atSystem.Windows.Window.MeasureOverride(SizeavailableSize)    atSystem.Windows.FrameworkElement.MeasureCore(SizeavailableSize)    atSystem.Windows.UIElement.Measure(SizeavailableSize)    atSystem.Windows.Interop.HwndSource.SetLayoutSize()    atSystem.Windows.Interop.HwndSource.set_RootVisualInternal(Visualvalue)    atSystem.Windows.Interop.HwndSource.set_RootVisual(Visualvalue)    atSystem.Windows.Window.SetRootVisual()    atSystem.Windows.Window.SetRootVisualAndUpdateSTC()    atSystem.Windows.Window.SetupInitialState(DoublerequestedTop,DoublerequestedLeft,DoublerequestedWidth,DoublerequestedHeight)    atSystem.Windows.Window.CreateSourceWindow(BooleanduringShow)    atSystem.Windows.Window.CreateSourceWindowDuringShow()    atSystem.Windows.Window.SafeCreateWindowDuringShow()    atSystem.Windows.Window.ShowHelper(ObjectbooleanBox)    atSystem.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegatecallback,Objectargs,Int32numArgs)    atSystem.Windows.Threading.ExceptionWrapper.TryCatchWhen(Objectsource,Delegatecallback,Objectargs,Int32numArgs,DelegatecatchHandler)    atSystem.Windows.Threading.DispatcherOperation.InvokeImpl()    atSystem.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Objectstate)    atSystem.Threading.ExecutionContext.RunInternal(ExecutionContextexecutionContext,ContextCallbackcallback,Objectstate,BooleanpreserveSyncCtx)    atSystem.Threading.ExecutionContext.Run(ExecutionContextexecutionContext,ContextCallbackcallback,Objectstate,BooleanpreserveSyncCtx)    atSystem.Threading.ExecutionContext.Run(ExecutionContextexecutionContext,ContextCallbackcallback,Objectstate)    atMS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContextexecutionContext,ContextCallbackcallback,Objectstate)    atSystem.Windows.Threading.DispatcherOperation.Invoke()    atSystem.Windows.Threading.Dispatcher.ProcessQueue()    atSystem.Windows.Threading.Dispatcher.WndProcHook(IntPtrhwnd,Int32msg,IntPtrwParam,IntPtrlParam,Boolean&handled)    atMS.Win32.HwndWrapper.WndProc(IntPtrhwnd,Int32msg,IntPtrwParam,IntPtrlParam,Boolean&handled)    atMS.Win32.HwndSubclass.DispatcherCallbackOperation(Objecto)    atSystem.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegatecallback,Objectargs,Int32numArgs)    atSystem.Windows.Threading.ExceptionWrapper.TryCatchWhen(Objectsource,Delegatecallback,Objectargs,Int32numArgs,DelegatecatchHandler)    atSystem.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPrioritypriority,TimeSpantimeout,Delegatemethod,Objectargs,Int32numArgs)    atMS.Win32.HwndSubclass.SubclassWndProc(IntPtrhwnd,Int32msg,IntPtrwParam,IntPtrlParam)    atMS.Win32.UnsafeNativeMethods.DispatchMessage(MSG&msg)    atSystem.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrameframe)    atSystem.Windows.Threading.Dispatcher.PushFrame(DispatcherFrameframe)    atSystem.Windows.Application.RunDispatcher(Objectignore)    atSystem.Windows.Application.RunInternal(Windowwindow)    atSystem.Windows.Application.Run(Windowwindow)    atSystem.Windows.Application.Run()    atDevExpressDemo.DockUI.MvvmWithLayoutAdapter.App.Main()inC:\Kun\Codes\Kun.Demo.DX.DockLayoutManager.Performance\DevExpressDemo.DockUI.MvvmWithLayoutAdapter\obj\Debug\App.g.cs:line 0    atSystem.AppDomain._nExecuteAssembly(RuntimeAssemblyassembly,String[]args)    atSystem.AppDomain.ExecuteAssembly(StringassemblyFile,EvidenceassemblySecurity,String[]args)    atMicrosoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()    atSystem.Threading.ThreadHelper.ThreadStart_Context(Objectstate)    atSystem.Threading.ExecutionContext.RunInternal(ExecutionContextexecutionContext,ContextCallbackcallback,Objectstate,BooleanpreserveSyncCtx)    atSystem.Threading.ExecutionContext.Run(ExecutionContextexecutionContext,ContextCallbackcallback,Objectstate,BooleanpreserveSyncCtx)    atSystem.Threading.ExecutionContext.Run(ExecutionContextexecutionContext,ContextCallbackcallback,Objectstate)    atSystem.Threading.ThreadHelper.ThreadStart()

Hello,

I've created a separate ticket on your behalf (T413639: NullReferenceException is raised when project from T273592 is started). It has been placed in our processing queue and will be answered shortly.

Thanks,
Andrey