http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : Community Forum : MEF Error Message Sat, 11 Apr 2026 02:03:21 -700 Thu, 07 Feb 2013 08:31:14 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=3983 http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ http://www.ideablade.com/forum/forum_posts.asp?TID=3983&PID=15840#15840 Author: gregweb
Subject: 3983
Posted: 07-Feb-2013 at 8:31am

Thanks, just moved over to .NET 4.5 and enabled the MEF exceptions and that is much better now.

Greg]]> Thu, 07 Feb 2013 08:31:14 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3983&PID=15840#15840 http://www.ideablade.com/forum/forum_posts.asp?TID=3983&PID=15839#15839 Author: mgood
Subject: 3983
Posted: 07-Feb-2013 at 8:25am

No, you are not really missing anything. What platform are you developing on? What you describe is pretty much state of the art for Silverlight and .NET 4. There is some debugging and diagnostics stuff in MefContrib, but unfortunatley that project is dead. In .NET 4.5 however things have improved. The lack of diagnositc and debugging info was a major criticism on MEF and Microsoft has improved things. The runtime exceptions in .NET 4.5 are much more descriptive and tell you the actual problem. ]]> Thu, 07 Feb 2013 08:25:32 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3983&PID=15839#15839 http://www.ideablade.com/forum/forum_posts.asp?TID=3983&PID=15828#15828 Author: gregweb
Subject: 3983
Posted: 06-Feb-2013 at 5:16pm

One issue I have with MEF is the apparent lack of descriptive exceptions.

For example, if my ViewModel imports a SubViewModel which itself has an import error, the resulting error message at runtime is simply that the ViewModel could not be found.

Now, looking at the debug window shows more detailed messages about what went wrong that can be used to resolve.

But I would rather get a runtime exception of the original error. I know in the past I have spent a lot of time trying to trace this type of error to it's source.

Anyhow, am I missing something, or is this the only debugging possible of MEF?

Greg]]> Wed, 06 Feb 2013 17:16:36 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3983&PID=15828#15828