Question

I’ve always wondering about this as from time to time I’ve encountered it with no clear indication where the problem lies.

Typically I’ve solved this by a process of elimination but I was hoping someone could help me with a better way which I could ideally use to provide clearer/more precise error handling?

Any help would be much appreciated.

thx.

p.s. in case it helps I’m developing in C#.

Answer 1

I use sql server profiler for figuring out issues with edmx queries.

And for finding out select queries being generated for linq-to-entity, like in following case,

var linqquery = from s in db.Employees 
                where s.name = "john"
                select s;

you can use

string logQuery = ((System.Data.Objects.ObjectQuery)linqquery).ToTraceString(); 

EDIT

Dont know anything that MVC provides for EF logging. Even EF does not have a logging built in! (LINQ-to-SQL has a Log property). Found these links which allows you to add logging to EF.

http://blogs.msdn.com/b/jkowalski/archive/2009/06/11/tracing-and-caching-in-entity-framework-available-on-msdn-code-gallery.aspx

or

http://codeclimber.net.nz/archive/2010/12/08/Logging-all-SQL-statements-done-by-Entity-Framework.aspx