silverlight application designer not loaded (urgent issue)

Question

User1368300014 posted

i have silverlight4 installed in my system (runtime, sdk, toolkits)

when create a new silverlight application the design view not get loaded and throughs the below error

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An Unhandled exception had occurred

System.ArgumentNullException

Value cannot be null.Parameter name: parentContext

at Microsoft.Windows.Design.Metadata.ReflectionMetadataContext..ctor(IMetadataContext parentContext) at MS.Internal.Host.ProjectMetadataContext..ctor(IMetadataContext platformMetadata, AssemblyReferenceProvider referenceProvider) at MS.Internal.Host.ProjectMetadataContext.FromReferences(AssemblyReferenceProvider referenceProvider) at MS.Internal.Designer.VSDesigner.GetMetadataForDesignerContext(DesignerContext designerContext) 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()

 

 

 let me know thats the solution for this .. its ver urgent

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Answer 1

User470413944 posted

Hi,

Are you using Windows Phone 7?

Generally, you can try to close VS and restart it then try to switch to design mode.

For similar issue:

http://social.msdn.microsoft.com/Forums/en-US/windowsphone7series/thread/2abcd28b-b520-41f8-9ce1-9e5c7724e8b0

I'm looking forward for your test result.

Answer 2

User1126057398 posted

Hello 

  I am a beginer in Silverlight. When I had tried to create a new application in Silverlight(VS2010), designer is not showing up. Below is the error msg on MainPage.xaml:

Unhandled Exception has occured.

Details:

System.NullReferenceException

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()

Wondering How to fix it???