Question

.NET Framework：4.5.1

我在Blend for Visual studio 2015中遇到一个奇怪的错误，我无法找到它的来源。

如果我在VS中打开我的WPF解决方案，它会加载并运行正常。设计视图也有效。

但是，如果我在Blend中打开我的WPF解决方案，每当我打开设计器中的任何.xaml文件时，它们会短暂加载（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'.

此“设计”文件夹不存在，我不知道从哪里获取请求。我没有在整个项目中定义任何指南或类似的东西。

另外，我看不到这两条消息之间的任何联系。

任何提示或想法都会被非常感谢！

Answer 1

<强>解决方案

因此，当我更新到.NET framework 4.6时，解决方案变得清晰。异常变成了在搜索中返回一些有用的东西：

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

我搜索到的第一个结果是Corrado's Blog，我被引导到工具＆gt;中的设置。选项＆gt; XAML设计器，然后在XAML Designer中勾选＆＃34;运行项目代码（如果支持）＆＃34;选项。

此后没有任何问题。希望这会在某些时候帮助别人。

Answer 2

好笑，我的Blend版本没有选项。窗口的其余部分看起来相同，只缺少提到的选项：/。

但是可以在excpetion对话框中单击第二个选项：单击此处启用运行项目代码并重新加载设计器。

也可以通过设计师窗口左下角的小切换按钮取消激活该选项：

有关详细说明，请参阅here。

Answer 3

我在BLEND遇到了类似的问题。 Visual Studio中的视图运行正常。我得到了这个例外：

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

因此，BLEND中的设计师显示视图1-2秒，然后抛出异常。

我解决这个问题的方法是：

我打开了我的VS csproj文件，发现引用中出现了另一条线，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" />

在评论之后，设计师不再抛出此异常了。所以我希望它可以帮助目前正在寻找解决方案的人：）

Blend for VS设计视图中的UnresolvedAssemblyException - 仅在VS设计视图中正常工作

3 个答案: