仅适用于 VS 设计视图的 Blend 中的 UnresolvedAssemblyException - 在 VS 设计视图中工作正常

UnresolvedAssemblyException in Blend for VS design view ONLY - works fine in VS design view

.NET 框架:4.5.1

我在 visual studio 2015 年的 Blend 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。设计视图也有效。

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(大约第二)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'.

此 "Design" 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,将不胜感激!

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。异常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,我被引导到工具 > 选项 > XAML 设计器中的设置,然后勾选 "Run project code in XAML Designer (if supported)" 选项。

此后没有问题。希望这在某些时候对其他人有所帮助。

有趣的是,我的 Blend 版本没有这个选项。 window 的其余部分看起来相同,只是缺少提到的选项 :/.

但可以单击异常对话框中的第二个选项:单击此处启用运行 项目代码并重新加载设计器

也可以通过设计器左下角的小切换按钮停用该选项window:

有关详细说明,请参阅 here

我在 BLEND 中遇到了类似的问题。 Visual Studio 中的视图 运行 很好。 我遇到了这个异常:

Type universe cannot resolve assembly: System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a

所以 BLEND 中的 Designer 显示视图 1-2 秒然后抛出异常。

我对这个问题的解决方案是:

我打开我的 VS csproj 文件,发现引用中出现了另一行,我不知道为什么,因为我还没有使用单元测试。参考如下:

<Reference Include="Microsoft.VisualStudio.QualityTools.UnitTestFramework, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />

designer注释掉后就没有再抛这个异常了。 所以我希望它可以帮助目前正在寻找解决方案的人:)