急切加载包括使用问题

Question

I am very new to MVC and Entity Framework and am trying to follow the asp.net tutorials and have run into a major snag. I have a table that displays correctly but shows the foreign key in the table instead of the data from the reference table. I think I am wanting to utilize eager loading here but I am not sure where to place my include. I believe the tutorial on asp.net is for an older version of MVC. I understand that my include should go in the following snippet. I am trying to include the artist type.

First, part of my model class:

        modelBuilder.Entity<tblArtist>()
            .HasMany(e => e.tblArtisttblArtistType)
            .WithRequired(e => e.tblArtist)
            .WillCascadeOnDelete(false);

        modelBuilder.Entity<tblArtist>()
            .HasMany(e => e.tblIssueArtist)
            .WithRequired(e => e.tblArtist)
            .WillCascadeOnDelete(false);

        modelBuilder.Entity<tblArtist>()
            .HasMany(e => e.tblIssueAutograph)
            .WithRequired(e => e.tblArtist)
            .WillCascadeOnDelete(false);

        modelBuilder.Entity<tblArtistType>()
            .HasMany(e => e.tblArtisttblArtistType)
            .WithRequired(e => e.tblArtistType)
            .WillCascadeOnDelete(false);

And my controller code:

public class tblArtistsController : Controller
{
    private joerdieComicsModel1 db = new joerdieComicsModel1();

    // GET: tblArtists
    public ActionResult Index()
    {

        return View(db.tblArtist.ToList());
    }

    // GET: tblArtists/Details/5
    public ActionResult Details(int? id)
    {
        if (id == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }
        tblArtist tblArtist = db.tblArtist.Find(id);
        if (tblArtist == null)
        {
            return HttpNotFound();
        }
        return View(tblArtist);
    }

I understand that the include code should go in the public ActionResult Index() method but I am lost as to how that is done.

Thank you.

Answer 1

When you have Many to Many relation Entity Framework automatically Create Table Interface but to relations that have foreign key you model must "EX : ArtistId".

For Example : Person.cs

  public class Person
  {
    public int Id { get; set; }

    public string Name { get; set; }

    public ICollection<Book> Books { get; set; }
  }

Book.cs

    public class Book
{
    public int Id { get; set; }

    public string Name { get; set; }

    public Person Person { get; set; }

    public int PersonId { get; set; }
}

In Model Builder :

 modelBuilder.Entity<Person>()
             HasMany(_ => _.Books)
            .WithRequired(_ => _.Person)
            .HasForeignKey(_ => _.PersonId)
            .WillCascadeOnDelete();

And See : One To Many