C# 试图从数据库表中读取，但输出不正确

这是我的密码：

tracks.cshtml

@page
@using Project.Models
@model Project.Pages.TracksModel
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

<div class="row">
    <h1 class="display-2">Tracks</h1>
    <table class="table">
        <thead class="thead-inverse">
            <tr>
                <th>Artist name</th>
                <th>Album name</th>
                <th>Track ID</th>
                <th>Track name</th>
            </tr>
        </thead>

        <tbody>
            @foreach (Track track in Model.Tracks)
            {
                <tr>
                    <td>@Html.DisplayFor(modelArtists => track.Artist.Name)</td>
                    <td>@Html.DisplayFor(modelAlbums => track.Album.Title)</td>
                    <td>@track.TrackId</td>
                    <td>@track.Name</td>
                    <td><a asp-page="/Tracks/Details" asp-route-id="@track.TrackId">Details</a></td>
                    <td><a asp-page="/Tracks/Edit" asp-route-id="@track.TrackId">Edit</a></td>
                    <td><a asp-page="/Tracks/Delete" asp-route-id="@track.TrackId">Delete</a></td>
                </tr>
            }
        </tbody>
    </table>
</div>
<div class="row">
    <p>Enter a name & TrackID (over 3510) for a new track:&nbsp;</p>
    <form method="POST">
        <div><input asp-for="Track.Name" /></div>
        <div><input asp-for="Track.TrackId" /></div>
        <input type="submit" />
    </form>
</div>
<div>
    <a asp-page="/Index">Home</a>
</div>

---

尽管如此，它仍然会导致完全相同的错误。

关键点在于

Context.Chinook.cs

protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            ....

            modelBuilder.Entity<Track>()
            .ToTable("tracks")
            .HasOne(mtype => mtype.Artist)
            .WithMany(trk => trk.Tracks)
            .HasForeignKey(mtype => mtype.AlbumId)
            .HasForeignKey(mtype => mtype.GenreId)
            .HasForeignKey(mtype => mtype.MediaTypeId)
            .OnDelete(DeleteBehavior.NoAction);
        }

WebApp.tracks.cshtml.cs

   public void OnGetAsync()
   {
        ViewData["Title"] = "Chinook Web Site - Tracks";

        Tracks = db.Tracks
        .Include(a => a.Album)
        .ThenInclude(a => a.Artist);
   }

WebApp.tracks.cshtml

   <tbody>
                @foreach (Track track in Model.Tracks)
                {
                    <tr>
                        <td>@Html.DisplayFor(modelArtists => track.Album.Artist.Name)</td>
                        <td>@Html.DisplayFor(modelAlbums => track.Album.Title)</td>
                        <td>@track.TrackId</td>
                        <td>@track.Name</td>
                        <td><a asp-page="/Tracks/Details" asp-route-id="@track.TrackId">Details</a></td>
                        <td><a asp-page="/Tracks/Edit" asp-route-id="@track.TrackId">Edit</a></td>
                        <td><a asp-page="/Tracks/Delete" asp-route-id="@track.TrackId">Delete</a></td>
                    </tr>
                }
</tbody>

@foreach（Model.Tracks中的轨迹）
{
@DisplayFor（modelArtists=>track.Album.Artister.Name）
@DisplayFor（modelAlbums=>track.Album.Title）
@track.TrackId
@音轨，名字
也许你可以提供静态html结果来检查错误。对不起，我真的不明白你的意思。但是如果你看这个屏幕截图，也许你会发现AC/DC发布的版本太多了。这是不正确的。艺术家的名字不知何故被错误地重复了。你验证过外国k吗ey在DB中是正确的？因为它看起来像Aerosmith也是ACDC。或者在进入循环之前，您是否调试过它并验证了它的正确性？抱歉，我不太确定您的意思？我可以在我的网站的其他页面上很好地显示艺术家的名字，这只是我遇到这个问题的一个页面。
protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            modelBuilder.Entity<Album>()
            .ToTable("albums")
                    .HasOne(al => al.Artist)
                .WithMany(ar => ar.Albums)
                .HasForeignKey(al => al.ArtistId);

            modelBuilder.Entity<Artist>().ToTable("artists");

            modelBuilder.Entity<Media_type>()
            .ToTable("media_types")
            .HasKey(c => c.MediaTypeId);

            modelBuilder.Entity<Genre>().ToTable("genres");

            modelBuilder.Entity<Track>()
            .ToTable("tracks")
            .HasOne(trk => trk.Album)
            .WithMany(trk => trk.Tracks)
            .HasForeignKey(trk => trk.AlbumId)
             .OnDelete(DeleteBehavior.NoAction);

            modelBuilder.Entity<Track>()
            .ToTable("tracks")
            .HasOne(trk => trk.Genre)
            .WithMany(trk => trk.Tracks)
            .HasForeignKey(trk => trk.GenreId);

            modelBuilder.Entity<Track>()
            .ToTable("tracks")
            .HasOne(trk => trk.Media_type)
            .WithMany(trk => trk.Tracks)
           .HasForeignKey(mtype => mtype.MediaTypeId);
        }

public class Artist
{
     public int ArtistId { get; set; }
     public string Name { get; set; }

     public ICollection<Album> Albums { get; set; }
}

public class Genre
{
    public int GenreId { get; set; }
    public string Name { get; set; }

    public ICollection<Track> Tracks { get; set; }
}

public class Media_type
{
    public  int MediaTypeId { get; set; }
    public  string Name { get; set; }

    public ICollection<Track> Tracks { get; set; }
}

    public class Track
    {
        public int TrackId { get; set; }
        public string Name { get; set; }
        public int? AlbumId { get; set; }
        public int? MediaTypeId { get; set; }
        public int? GenreId { get; set; }
        public string Composer { get; set; }
        public int? Milliseconds { get; set; }
        public int? Bytes { get; set; }
        public int? UnitPrice { get; set; }

        public Album Album { get; set; }
        public Genre Genre { get; set; }
        public Media_type Media_type { get; set;}
    }

   public void OnGetAsync()
   {
        ViewData["Title"] = "Chinook Web Site - Tracks";

        Tracks = db.Tracks
        .Include(a => a.Album)
        .ThenInclude(a => a.Artist);
   }

   <tbody>
                @foreach (Track track in Model.Tracks)
                {
                    <tr>
                        <td>@Html.DisplayFor(modelArtists => track.Album.Artist.Name)</td>
                        <td>@Html.DisplayFor(modelAlbums => track.Album.Title)</td>
                        <td>@track.TrackId</td>
                        <td>@track.Name</td>
                        <td><a asp-page="/Tracks/Details" asp-route-id="@track.TrackId">Details</a></td>
                        <td><a asp-page="/Tracks/Edit" asp-route-id="@track.TrackId">Edit</a></td>
                        <td><a asp-page="/Tracks/Delete" asp-route-id="@track.TrackId">Delete</a></td>
                    </tr>
                }
</tbody>