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Retrieving Mapped SharePoint Custom Pages from PowerShell

Issue

If you’re trying to debug a mapped custom page in SharePoint from PowerShell, but come across this issue:

PS C:> $webapp = get-spwebapplication http://sp2010

$webapp.GetMappedPage([Microsoft.SharePoint.Administration.SPWebApplication.SPCustomPage]::Error)

Unable to find type [Microsoft.SharePoint.Administration.SPWebApplication.SPCustomPage]: make sure that the 

assembly containing this type is loaded.

At line:2 char:90

+ $webapp.GetMappedPage([Microsoft.SharePoint.Administration.SPWebApplication.SPCustomPage] <<<< ::Error)

    + CategoryInfo          : InvalidOperation: (Microsoft.Share...on.SPCustomPage:String) [], RuntimeException

    + FullyQualifiedErrorId : TypeNotFound

Solution

Try this instead:

$webapp.GetMappedPage([Microsoft.SharePoint.Administration.SPWebApplication+SPCustomPage]::Signout)

The Clue

I’m not sure why the syntax is different for this. I would have expected a period instead of a plus there before SPCustomPage. None of my research on Enums showed a plus sign, but finally I noticed this:

PS C:> $webapp.GetMappedPage



MemberType          : Method

OverloadDefinitions : {string GetMappedPage(Microsoft.SharePoint.Administration.SPWebApplication+SPCustomPage key), 

	string GetMappedPage(string page)}

TypeNameOfValue     : System.Management.Automation.PSMethod

Value               : string GetMappedPage(Microsoft.SharePoint.Administration.SPWebApplication+SPCustomPage key), 

	string GetMappedPage(string page)

Name                : GetMappedPage

IsInstance          : True

Reference

Mapping Custom Error Pages for SharePoint 2010 Site, Ram Prasad MCTS, http://www.spdeveloper.co.in/articles/pages/custom-error-pages-for-sharepoint2010-sites.aspx

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