Question

i have the following action method that calls a repository method:-

public ActionResult Details(int id)
        { 
            Instructor i = repository.FindInstructor(i);
            ViewBag.assessmentid = repository.FindassessmentID(id);
            if (i == null)
                return View("NotFound");
            else
                return View(i);}

but how i can define that i need to define an eager loading for the Position navigation property on the instructor entity (as the instructor might hold 0 or many positions), the FindInstructor(i) repository method look as the folloiwng:

public Question FindInstructor(int id)
        {
           return entities1.Instructors.FirstOrDefault(d => d.InstructorID == id); }

the intellisense will NOT allow me to write something like :-

return entities1.Instructors.Include(c => c.Position).FirstOrDefault(d => d.InstructorID == id); }

so what i am missing in my code???

Answer 1

The overload of the Include method which takes a property expression is an extension method in the System.Data.Entity namespace.

Add this using to your file and it should work:

using System.Data.Entity;

You can read more about how eager loading works: Loading Related Entities