wpf - 仅适用于 VS 设计 View 的 Blend 中的 UnresolvedAssemblyException - 在 VS 设计 View 中工作正常

Question

.NET 框架:4.5.1

我在 Blend for visual studio 2015 中遇到一个奇怪的错误，我找不到它的来源。

如果我在 VS 中打开我的 WPF 解决方案，它会加载并运行良好。设计 View 也适用。

但是，如果我在 Blend 中打开我的 WPF 解决方案，每当我在设计器中打开我的任何 .xaml 文件时，它们都会短暂加载(大约一秒钟)然后抛出以下错误:

Microsoft.MetadataReader.UnresolvedAssemblyException
Type universe cannot resolve assembly: System.Runtime, Version=4.0.0.0, 

Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a.
   at Microsoft.MetadataReader.SimpleUniverse.Microsoft.MetadataReader.ITypeUniverse.ResolveAssembly(AssemblyName name)
   at Microsoft.MetadataReader.SimpleUniverse.Microsoft.MetadataReader.ITypeUniverse.ResolveAssembly(Module scope, Token tokenAssemblyRef)
   at Microsoft.MetadataReader.MetadataOnlyModule.ResolveTypeRef(ITypeReference typeReference)
   at Microsoft.MetadataReader.MetadataOnlyTypeReference.GetResolvedTypeWorker()
   at Microsoft.MetadataReader.TypeProxy.GetResolvedType()
   at Microsoft.MetadataReader.TypeProxy.GetHashCode()
   at System.Collections.Generic.ObjectEqualityComparer`1.GetHashCode(T obj)
   at System.Collections.Concurrent.ConcurrentDictionary`2.TryGetValue(TKey key, TValue& value)
   at Microsoft.VisualStudio.DesignTools.XamlDesigner.Metadata.XamlPlatformMetadata.GetType(Type type)
   at Microsoft.VisualStudio.DesignTools.Platform.Metadata.TypeResolver.GetType(String key, IAssembly assembly, Type type)
   at Microsoft.VisualStudio.DesignTools.Platform.Metadata.TypeResolver.GetType(Type type)
   at Microsoft.VisualStudio.DesignTools.XamlDesigner.Metadata.XamlProjectMetadata.GetType(Type type)
   at Microsoft.VisualStudio.DesignTools.Platform.Metadata.ProjectContextType.Cache()
   at Microsoft.VisualStudio.DesignTools.Platform.Metadata.ProjectContextType.Initialize(IXmlNamespace xmlNamespace, Type type)
   at Microsoft.VisualStudio.DesignTools.XamlDesigner.Metadata.MockType.Initialize(IXmlNamespace xmlNamespace, Type type)
   at Microsoft.VisualStudio.DesignTools.Platform.Metadata.TypeResolver.GetType(String key, IAssembly assembly, Type type)
   at Microsoft.VisualStudio.DesignTools.Platform.Metadata.TypeResolver.GetType(Type type)
   at Microsoft.VisualStudio.DesignTools.XamlDesigner.Metadata.XamlProjectMetadata.GetType(Type type)
   at Microsoft.VisualStudio.DesignTools.Platform.Metadata.ProjectContextType.Cache()
   at Microsoft.VisualStudio.DesignTools.Platform.Metadata.ProjectContextType.Initialize(IXmlNamespace xmlNamespace, Type type)
   at Microsoft.VisualStudio.DesignTools.XamlDesigner.Metadata.MockType.Initialize(IXmlNamespace xmlNamespace, Type type)
   at Microsoft.VisualStudio.DesignTools.Platform.Metadata.TypeResolver.GetType(String key, IAssembly assembly, Type type)
   at Microsoft.VisualStudio.DesignTools.Platform.Metadata.TypeResolver.GetType(Type type)
   at Microsoft.VisualStudio.DesignTools.XamlDesigner.Metadata.XamlProjectMetadata.GetType(Type type)
   at Microsoft.VisualStudio.DesignTools.XamlDesigner.Tools.Assets.AssemblyAssetProvider.SynchronizedInitialize()
   at Microsoft.VisualStudio.DesignTools.XamlDesigner.Tools.Assets.AssemblyAssetProvider.UpdateAssets()
   at Microsoft.VisualStudio.DesignTools.Designer.Tools.Assets.AssetProvider.Update()
   at Microsoft.VisualStudio.DesignTools.Designer.Tools.Assets.AssetLibrary.UpdateAssetProvidersWorker()
   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)
   at System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   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, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   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.DispatcherOperation.Wait(TimeSpan timeout)
   at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherOperation operation, CancellationToken cancellationToken, TimeSpan timeout)
   at System.Windows.Threading.Dispatcher.Invoke(Action callback, DispatcherPriority priority, CancellationToken cancellationToken, TimeSpan timeout)
   at System.Windows.Threading.Dispatcher.Invoke(Action callback, DispatcherPriority priority)
   at Microsoft.VisualStudio.DesignTools.Platform.Utility.UIThreadDispatcherHelper.Invoke(DispatcherPriority dispatcherPriority, Action action)
   at Microsoft.VisualStudio.DesignTools.Designer.View.DesignTimeResourceResolver.Resolve(IDocumentContext documentContext, EditDesignTimeResourceModelMode mode, String missingResourceName) ........etc

如果我在 Visual Studio 中调试它(附加到 blend.exe 进程)，我会收到以下错误:

Exception thrown: 'System.IO.DirectoryNotFoundException' in mscorlib.dll

Additional information: Could not find a part of the path '<path to my project>\Design\projectGuides.guides'.

这个“设计”文件夹不存在，我不知道从哪里请求它。我没有在我的整个项目或类似的东西中定义任何指南。

此外，我看不出这两条消息之间有任何联系。

如有任何提示或想法，我们将不胜感激!

Answer 1

解决方案

因此，当我更新到 .NET Framework 4.6 时，这个问题的解决方案就变得清晰了。 Exception 变成了返回在搜索中有用的东西的东西:

Cannot add additional fields to a type that does not have a constructor

我搜索这个的第一个结果是Corrado's Blog ，我被定向到工具 > 选项 > XAML 设计器中的设置，然后勾选“在 XAML 设计器中运行项目代码(如果支持)”选项。

从那以后就没有问题了。希望这在某些时候对其他人有帮助。