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How do I fully trust this operation?

  Asked By: Krista    Date: Oct 16    Category: Sharepoint    Views: 820

I have a code security/permissions issue.

A member of my development Team is building a simple webpart whose
only purpose is to be an IRowProvider for other webparts.
The information that this webpart is providing is a distilled set of
employee data. This data is unlikely to change during the day so I
wrote an assembly that uses an HTTPModule to monitor for changes in
the source data and keep an ASP.Net Cache object current with a
DataTable of the active information. (We do not have SQL 2005.)
This DLL works like a champ in regular ASP.Net 1.1 websites.

I then added some methods in our "webpart helper" library to return
a particular Employee class based on either the currently logged in
user (System.Web.HttpContext.Current.User.Identity.Name) or based on
a Network ID passed to the method. The Employee class is really
little more than a wrapper to a DataRow from the cached DataTable...
just to give junior developer Intellisense.

My developer then built a prototype webpart that references both the
MyCompany.WebPart.WPHelper.DLL assembly and it's required
counterpart, MyCompany.Web.EmployeeDetails.DLL. When we try to
retrieve the DataTable from the ASP.Net cache, we get the following
exception, "System.Security.SecurityException: Security error.".

I have both assemblies and the webpart all three in the GAC; I have
all three listed in the "SafeControls" area of the web.config.
I even tried setting <trust level="Full" originUrl="" />, but that
wasn't successful, so I backed it down.



3 Answers Found

Answer #1    Answered By: Alison West     Answered On: Oct 16

No developers looking at the messages?

Answer #2    Answered By: Freddy Heath     Answered On: Oct 16

I estimate this list to be roughly 2/3 developers. Not all posts get answered, however. This is a “volunteer” list……….

Answer #3    Answered By: Joanna Dixon     Answered On: Oct 16

There are developers who read this list but it depends on what time your messages are posted. Think timezones.

Even though you put your webpart  in the GAC, I think you still need to do impersonation to access the user information  to do the interaction with the system.

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