Code Access Security - System.Security.SecurityException: Request failed.

[Chris Crowe [MVP 2005/2006]]

I have written a Web User Control that runs inside of Sharepoint, but when I
want to use a custom convertor class to convert an XML attribute I get the
following error:



System.Security .SecurityExcept ion: Request failed.





Basically I start with a DataSet that I then want to transform into HTML via
an XSL stylesheet.



I do not appear to be able to use the XsltArgumentLis t Extension Object.
[color=blue]
>From what I have found this object requires FULL TRUST.[/color]



If I comment out the args.AddExtensi onObject("urn:t rimble-date",

Convertor); the code works fine.



This code basically installs an extension object which in my case converts
date/times to a format that I want to use in my XSL



To make this worse this needs to run as part of a sharepoint application.



I have tried adjusting the security on the DLL that this code is part of and
it does not help.



Does anyone have any thoughts?



try

{

XmlDataDocument datadoc = new XmlDataDocument (ds);

XslTransform myXslTrans = new XslTransform() ;

myXslTrans.Load (XSLFileSpec);



// Add an object to convert DateTime format.

HelpdeskDateCon vertor Convertor = new HelpdeskDateCon vertor();

XsltArgumentLis t args = new XsltArgumentLis t();

args.AddExtensi onObject("urn:t rimble-date", Convertor);



myXslTrans.Tran sform(datadoc,n ull, stWrite,null);

}

catch(Exception ex)

{

stWrite.Write(e x.ToString());

}



Chris