LINQ “.Include” orderby in subquery

Question

I have the following entity code, which returns all users and \"includes\" all of their sample requests:

    var userQuery = from u in _IntranetContext.UserS         


        

Answer 1

Edit: Treed by <15 seconds.

var userQuery = from u in _IntranetContext.UserSet.Include("SampleRequests")
                orderby u.LastName ascending, u.SampleRequestId descending
                select u;

Answer 2

Just add another ordering parameter to the orderby:

var userQuery = from u in _IntranetContext.UserSet.Include("SampleRequests")
                           orderby u.LastName ascending, 
                                   u.SampleRequestId descending
                           select u;

Answer 3

I can currently think of two options for what you want. You can select them into a new class, where the user and the associated requests are properties:

var userQuery = from u in _IntranetContext.UserSet.Include("SampleRequests")
                orderby u.LastName ascending
                select new
                {
                    User = u,
                    SampleRequests = u.SampleRequests.OrderByDescending(r => r.SampleRequestId)
                };

This will cause issues if you wanted to return this type, as it is anonymous.

You can also select this into a new user object, similar to this:

var userQuery = from u in _IntranetContext.UserSet.Include("SampleRequests")
                orderby u.LastName ascending
                select new User
                {
                    Property1 = u.Property1,
                    Property2 = u.Property2,
                    Property3 = u.Property3,
                    SampleRequests = u.SampleRequests.OrderByDescending(r => r.SampleRequestId).ToList()
                };

This will return a collection of User objects, but updating the objects in the database could cause issues.