ModulePageFacade.PlaceUnder throws a NullReferenceException - Sitefinity - Front- & Back-End Development

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Posted by Community Admin on 20-Dec-2011 00:00

I'm trying to install a module using the fluent API and I'm running into the following error.

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Timestamp: 12/20/2011 4:47:34 PM

Message: HandlingInstanceID: 52582b92-9d03-486f-b453-b4158453dfbe

An exception of type 'System.NullReferenceException' occurred and was caught.

-----------------------------------------------------------------------------

12/20/2011 11:47:33

Type : System.NullReferenceException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089

Message : Object reference not set to an instance of an object.

Source : Telerik.Sitefinity

Help link :

Data : System.Collections.ListDictionaryInternal

TargetSite : Void ChangeParent(Telerik.Sitefinity.Pages.Model.PageNode, Telerik.Sitefinity.Pages.Model.PageNode, Boolean)

Stack Trace :    at Telerik.Sitefinity.Modules.Pages.PageManager.ChangeParent(PageNode childNode, PageNode newParent, Boolean storeCurrentUrlAsAdditional)

at Telerik.Sitefinity.Fluent.Modules.ModulePageFacade`1.PlaceUnder(CommonNode commonNode)

at CaseStudies.CaseStudiesModule.InstallPages(SiteInitializer initializer) in C:\_Projects\EL.com\CaseStudies\CaseStudiesModule.cs:line 70

at Telerik.Sitefinity.Modules.GenericContent.ContentModuleBase.Install(SiteInitializer initializer)

at CaseStudies.CaseStudiesModule.Install(SiteInitializer initializer) in C:\_Projects\EL.com\CaseStudies\CaseStudiesModule.cs:line 49

at Telerik.Sitefinity.Services.ModuleBase.Install(SiteInitializer initializer, Version upgradeFrom)

at Telerik.Sitefinity.Services.SystemManager.InitializeModule(ModuleSettings settings, InstallContext installContext, Boolean start)

Additional Info:

MachineName : EL-00020-PC

TimeStamp : 12/20/2011 4:47:33 PM

FullName : Telerik.Sitefinity.Utilities, Version=4.2.1650.0, Culture=neutral, PublicKeyToken=b28c218413bdf563

AppDomainName : /LM/W3SVC/8/ROOT-3-129688732458111214

ThreadIdentity :

WindowsIdentity : NT AUTHORITY\NETWORK SERVICE

Requested URL : http://127.0.0.1/

Category: ErrorLog

Priority: 0

EventId: 9010

Severity: Warning

Title:Enterprise Library Exception Handling

Machine: EL-00020-PC

App Domain: /LM/W3SVC/8/ROOT-3-129688732458111214

ProcessId: 11040

Process Name: c:\windows\system32\inetsrv\w3wp.exe

Thread Name:

Win32 ThreadId:11888

Extended Properties:

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Here's the matching code:

protected override void InstallPages(SiteInitializer initializer)

var pageManager = initializer.PageManager;

App.WorkWith().Module(ModuleName, pageManager)

.Install()

.CreateModulePage(LandingPageId, "Case Studies")

.PlaceUnder(CommonNode.TypesOfContent)

.SetOrdinal(1)

.ShowInNavigation()

.SetTitle("Case Studies")

.SetUrlName("case-studies")

.AddControl(new Literal Text = "<h1>Hello, Case Studies!</h1>" )

.Done();

Thoughts?

Posted by Community Admin on 23-Dec-2011 00:00

Hi,

Thank you for the information. However, I could not reproduce this exception embedding your code in one of our sample custom modules.
It would be great help if you could share an archive of your project folder, including the custom module and a backup of your database (or at least all the custom files related to your module), so we can reproduce the error in a debugged environment and get to the cause of this issue.
Thank you.
Wishing you happy holidays and a happy new year!

Greetings,
Alon Rotem
the Telerik team

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