本文介绍了silverlight 3,对象引用未设置为MainPage.xaml中对象的实例的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我已将silverlight工具包添加到我的vs2010然后我尝试在MainPage.xaml上打开它时创建一个silverlight应用程序我收到以下错误消息你可以帮我修复它





对象引用未设置为对象的实例。

at Microsoft.Windows.Design.Platform.SilverlightMetadataContext.SilverlightXamlExtensionImplementations。< getxmlnamespacecompatibilitymappings> d__8.MoveNext()

at MS.Internal.Design.Metadata.ReflectionProjectNode.BuildSubsumption()

at MS.Internal.Design.Metadata.ReflectionProjectNode.SubsumingNamespace(Identifier identifier )

在MS.Internal.Design.Markup.XmlElement.BuildScope(PrefixScope parentScope,IParseContext context)

在MS.Internal.Design.Markup.XmlElement.ConvertToXaml(XamlElement parent,PrefixScope parentScope,IParseContext context,IMarkupSourceProvider provider)

at MS.Internal.Design.DocumentModel.Documen tTrees.Markup.XamlSourceDocument.FullParse(Boolean convertToXamlWithErrors)

at MS.Internal.Design.DocumentModel.DocumentTrees.Markup.XamlSourceDocument.get_RootItem()

at Microsoft.Windows。 Design.DocumentModel.Trees.ModifiableDocumentTree.get_ModifiableRootItem()

at Microsoft.Windows.Design.DocumentModel.MarkupDocumentManagerBase.get_LoadState()

at MS.Internal.Host.PersistenceSubsystem。加载()

在MS.Internal.Host.Designer.Load()

在MS.Internal.Designer.VSDesigner.Load()

在MS.Internal.Designer.VSIsolatedDesigner.VSIsolatedView.Load()

在MS.Internal.Designer.VSIsolatedDesigner.VSIsolatedDesignerFactory.Load(IsolatedView视图)

在MS。 Internal.Host.Isolation.IsolatedDesigner.BootstrapProxy.LoadDesigner(IsolatedDesignerFactory factory,IsolatedView视图)

在MS.Internal.Host.Isolation.IsolatedDesigner.BootstrapProxy.LoadDesigner(IsolatedDesignerFactory fac)保守党,IsolatedView视图)

在MS.Internal.Host.Isolation.IsolatedDesigner.Load()

在MS.Internal.Designer.DesignerPane.LoadDesignerView()

I have added silverlight toolkit to my vs2010 and then i tried creating a silverlight application on opening it on the MainPage.xaml i got the following error message can you help me in fixing it


Object reference not set to an instance of an object.
at Microsoft.Windows.Design.Platform.SilverlightMetadataContext.SilverlightXamlExtensionImplementations.<getxmlnamespacecompatibilitymappings>d__8.MoveNext()
at MS.Internal.Design.Metadata.ReflectionProjectNode.BuildSubsumption()
at MS.Internal.Design.Metadata.ReflectionProjectNode.SubsumingNamespace(Identifier identifier)
at MS.Internal.Design.Markup.XmlElement.BuildScope(PrefixScope parentScope, IParseContext context)
at MS.Internal.Design.Markup.XmlElement.ConvertToXaml(XamlElement parent, PrefixScope parentScope, IParseContext context, IMarkupSourceProvider provider)
at MS.Internal.Design.DocumentModel.DocumentTrees.Markup.XamlSourceDocument.FullParse(Boolean convertToXamlWithErrors)
at MS.Internal.Design.DocumentModel.DocumentTrees.Markup.XamlSourceDocument.get_RootItem()
at Microsoft.Windows.Design.DocumentModel.Trees.ModifiableDocumentTree.get_ModifiableRootItem()
at Microsoft.Windows.Design.DocumentModel.MarkupDocumentManagerBase.get_LoadState()
at MS.Internal.Host.PersistenceSubsystem.Load()
at MS.Internal.Host.Designer.Load()
at MS.Internal.Designer.VSDesigner.Load()
at MS.Internal.Designer.VSIsolatedDesigner.VSIsolatedView.Load()
at MS.Internal.Designer.VSIsolatedDesigner.VSIsolatedDesignerFactory.Load(IsolatedView view)
at MS.Internal.Host.Isolation.IsolatedDesigner.BootstrapProxy.LoadDesigner(IsolatedDesignerFactory factory, IsolatedView view)
at MS.Internal.Host.Isolation.IsolatedDesigner.BootstrapProxy.LoadDesigner(IsolatedDesignerFactory factory, IsolatedView view)
at MS.Internal.Host.Isolation.IsolatedDesigner.Load()
at MS.Internal.Designer.DesignerPane.LoadDesignerView()

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09-27 13:25