SPMetal with Anonymous Access
So, I recently ran into a problem with using SPMetal with anonymous access. When Anonymous users access a web part that runs LINQ queries, they’ll get prompted for credentials in SharePoint 2010. The problem is actually related to the way the LINQ code works. It uses the default SPContext.Current to get the site objects. This becomes a problem when you need to run a piece of code with elevated permissions because without rebuilding the SPContext.Current, you’re still using the default permissions. With the default permissions, as an anonymous user, you will not have enough access to make calls using LINQ and as a result, you’ll be prompted to log in.
This blog had an okay solution:
Use the HttpContext object to force all SP objects to be created again. When this happens within the RunWithElevatedPrivileges method, the SPContext is recreated with this higher level of priveleges.
This code has its problems though.
