问题描述
有人对此有解决方案吗?
Does anyone have a solution for this?
System.NullReferenceException:对象引用未设置为对象的实例. ---> System.NullReferenceException:对象引用未设置为对象的实例. ---> System.NullReferenceException:对象引用未设置为实例 一个对象.
在Microsoft.Expression.Platform.PlatformService.PlatformEntry.get_PlatformCreator()
在Microsoft.Expression.Platform.PlatformService.GetPlatformCreator(String frameworkSpec)
在Microsoft.Expression.Platform.PlatformService.IsCompatibleFramework(FrameworkName hostFramework，FrameworkName guestFramework)
在Microsoft.Expression.DesignSurface.Project.ProjectContextManager.GetProjectContext(IHostProject项目，IPlatform平台，布尔创建)
在Microsoft.Expression.DesignSurface.Project.ProjectContextManager.GetSourceItemContext(IHostSourceItem sourceItem)
在Microsoft.Expression.DesignSurface.DesignerService.CreateDesigner(IHostSourceItem项目，IHostTextEditor编辑器，CancellationToken cancelToken)
在Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.<> c__DisplayClass9.< Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner> b__8()
在Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler中.<> c__DisplayClass19`1.< MarshalIn> b__18()
在Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.Call.InvokeWorker()
---内部异常堆栈跟踪的结尾---
System.NullReferenceException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Expression.Platform.PlatformService.PlatformEntry.get_PlatformCreator()
at Microsoft.Expression.Platform.PlatformService.GetPlatformCreator(String frameworkSpec)
at Microsoft.Expression.Platform.PlatformService.IsCompatibleFramework(FrameworkName hostFramework, FrameworkName guestFramework)
at Microsoft.Expression.DesignSurface.Project.ProjectContextManager.GetProjectContext(IHostProject project, IPlatform platform, Boolean create)
at Microsoft.Expression.DesignSurface.Project.ProjectContextManager.GetSourceItemContext(IHostSourceItem sourceItem)
at Microsoft.Expression.DesignSurface.DesignerService.CreateDesigner(IHostSourceItem item, IHostTextEditor editor, CancellationToken cancelToken)
at Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.<>c__DisplayClass9.<Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner>b__8()
at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.<>c__DisplayClass19`1.<MarshalIn>b__18()
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.Call.InvokeWorker()
--- End of inner exception stack trace ---
服务器堆栈跟踪:
在Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.WaitForCompletion(NestedCallContext nestedCallContext，BlockingCall调用，WaitHandle超时信号)
在Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.MarshalIn(动作，Int32 targetApartmentId)
在Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalIn(IRemoteObject targetObject，Action action)
在Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalIn [TResult](IRemoteObject targetObject，Func`1 func)
在Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner(IRemoteHostSourceItem remoteItem，IRemoteHostTextEditor remoteEditor，IRemoteCancellationToken remoteToken)
在System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md，Object [] args，Object server，Object []& outArgs)
在System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage消息)
Server stack trace:
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.WaitForCompletion(NestedCallContext nestedCallContext, BlockingCall call, WaitHandle timeoutSignal)
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.MarshalIn(Action action, Int32 targetApartmentId)
at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalIn(IRemoteObject targetObject, Action action)
at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalIn[TResult](IRemoteObject targetObject, Func`1 func)
at Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner(IRemoteHostSourceItem remoteItem, IRemoteHostTextEditor remoteEditor, IRemoteCancellationToken remoteToken)
at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs)
at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg)
在[0]处引发异常:
在System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg，IMessage retMsg)
在System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke处(MessageData& msgData，Int32类型)
在Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner(IRemoteHostSourceItem remoteItem，IRemoteHostTextEditor remoteEditor，IRemoteCancellationToken cancelToken)
在Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.<> c__DisplayClass2.< CreateDesignerImpl> b__0(IRemoteDesignerService d)
在Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler中.<> c__DisplayClass4`2.< MarshalOut> b__3()
在Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.Call.InvokeWorker()
---内部异常堆栈跟踪的结尾---
在Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.WaitForCompletion(NestedCallContext nestedCallContext，BlockingCall调用，WaitHandle超时信号)
在Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.MarshalOut(动作，Int32 targetApartmentId，WaitHandle中止，WaitHandle超时信号)
在Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalOut [TValue](RemoteHandle`1 targetObject，Action操作)
在Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalOut [TResult，TValue](RemoteHandle`1 targetObject，Func`2 func)
在Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.CreateDesignerImpl(IHostSourceItem项目，IHostTextEditor编辑器，RemoteCancellationToken remoteCancelToken)
在Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.Microsoft.Expression.DesignHost.IDesignerService.CreateDesigner(IHostSourceItem项，IHostTextEditor编辑器，CancellationToken cancelToken)中
在Microsoft.Expression.DesignHost.IsolatedDesignerService.IsolatedDesignerView.CreateDesignerViewInfo(CancellationToken cancelToken)
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner(IRemoteHostSourceItem remoteItem, IRemoteHostTextEditor remoteEditor, IRemoteCancellationToken cancelToken)
at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.<>c__DisplayClass2.<CreateDesignerImpl>b__0(IRemoteDesignerService d)
at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.<>c__DisplayClass4`2.<MarshalOut>b__3()
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.Call.InvokeWorker()
--- End of inner exception stack trace ---
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.WaitForCompletion(NestedCallContext nestedCallContext, BlockingCall call, WaitHandle timeoutSignal)
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.MarshalOut(Action action, Int32 targetApartmentId, WaitHandle aborted, WaitHandle timeoutSignal)
at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalOut[TValue](RemoteHandle`1 targetObject, Action action)
at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalOut[TResult,TValue](RemoteHandle`1 targetObject, Func`2 func)
at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.CreateDesignerImpl(IHostSourceItem item, IHostTextEditor editor, RemoteCancellationToken remoteCancelToken)
at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.Microsoft.Expression.DesignHost.IDesignerService.CreateDesigner(IHostSourceItem item, IHostTextEditor editor, CancellationToken cancelToken)
at Microsoft.Expression.DesignHost.IsolatedDesignerService.IsolatedDesignerView.CreateDesignerViewInfo(CancellationToken cancelToken)
推荐答案
能否请您提供上下文信息?
Can you please provide contextual information?
什么Windows版本?什么VS版本?发生错误等时您要做什么?
What Windows version? What VS edition? What are you trying to do when the error occurs, etc.?
如果我们知道错误消息出现的时间，那么这些错误消息可能会很有用.
The error messages may be useful if we know what was happening when they appeared.
这篇关于适用于Visual Studio 2012的Expression Blend 2012的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！