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SecurityException when using XSLTArgumentList in webpart

  Asked By: Demarco    Date: Nov 11    Category: Sharepoint    Views: 984

I am facing a problem in my webpart development.
I am using the XML web control in my webpart to
XSLT transformation. But in my xslt i am calling
user defined functions
written in c#. for this i use XSLTArgumentList
class and add it using

It is documented that the caller needs to have
"FullTrust" to invoke the
AddExtensionObject method. if not a
SecurityException occurs.

Though I am deploying my webpart in Gac i am getting
this error.
So I modified my wss_minimaltrust.config file and
added an IPermission tag
with Strongname membership condition for my webpart
assembly still same

The funny thing is it works fine when i use the same
logic in a web
application. but when i use it in a webpart it does

anyone can throw some light on this.

HOW to grant FULLTRUST privilege to a custom webpart



3 Answers Found

Answer #1    Answered By: Renee Murray     Answered On: Nov 11

I'm not positive here, but I believe the limitations
listed here
are getting in the way of what you are attempting to
do as well.

So I don't think anything you do will help, you'll
need to figure out a different way to solve the

However, I'm all ears if someone has a solution.

Answer #2    Answered By: Harshini Raju     Answered On: Nov 11

I am able to get the webpart  to work if i set trust level="full" in the web.config. Therefore if I manage to give full trust to the webpart assembly I should be able to get the webpart to work with XSLTArgumentList.
modified  the wss_mediumtrust.config file  as listed below but the webpart assembly is not fully trusted. Can anyone of you please take a look at this and point out the mistake.

Apparently, like all parents, I am blind to the faults of my child.

class ="NamedPermissionSet"
version ="1"
Unrestricted ="true"
Name ="FullTrust"
Description ="Allows full access to all resources"
<!-- remaining permission set definitions -->

</ NamedPermissionSets >

< CodeGroup
version ="1"
PermissionSetName ="Nothing">
< CodeGroup
class ="UnionCodeGroup"
version ="1"
PermissionSetName ="FullTrust">
< IMembershipCondition
class ="StrongNameMembershipCondition"
version ="1"
PublicKeyBlob ="0024.......4806BE02D13FB854DDA"
Name ="<Webpart Assembly name>"
AssemblyVersion =""/>
< IMembershipCondition
class ="UrlMembershipCondition"
version ="1"
Url ="$AppDirUrl$/*"/>
< CodeGroup
class ="UnionCodeGroup"
version ="1"
PermissionSetName ="ASP.Net">
< IMembershipCondition
class ="UrlMembershipCondition"
Url ="$AppDirUrl$/*"/>
</ CodeGroup >

<!-- remaining code group definitions -->
</ CodeGroup >

Answer #3    Answered By: Christop Mcfadden     Answered On: Nov 11

I solved the problem  by adding the function i wrote in a C# file  to a msxsl:script tag in the xslt  file. this eliminated the need to use AddExtensionObject and thereby the need to give full trust to the webpart.

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