哪里不能加入LINQ

Question

I have the following function:

public IList<Movie> GetMovieTimeTable(DateTime date)
{
   var result = (from m in movierepo.Movies
   join t in timetablerepo.TimeTables on m.MovieId equals t.MovieId
   where t.StartTime.Date == date.Date
   select m).Distinct().ToList();
   return result;
}

It works fine, but the where condition doesn't work. Still all records from timetablerepo with the same MovieId are returned. What's the reason for that? What I am doing wrong? And what is the correct way to do this?

EDIT: Example:

I have an record in Movies with MovieId = 34 In TimeTable there are 3 records:

MovieId StartTime 
34 08-06-2015 19:00 
34 09-06-2015 21:00 
34 10-06-2015 20:00 
(Dutch DateTime Format) 

Given the date in 'date' I want to filter the records to that day. (Time is important at this moment). Now I'am getting al these records.

Example 2:

DateTime Date = {8-6-2015 00:00:00}

Result.Count=6 (That's right)
[0] 
MovieId = 2
(Etc..)
   TimeTables
   [0]
   MovieId = 2
   StartTime = {5-5-2015 20:00:00}
   (Etc..)
   [1]
   MovieId =2 
   StartTime = {28-5-2015 20:00:00}
   (Etc..)
[1]
MovieId = 13
TimeTables
   [0]
   MovieId = 13
   StartTime = {28-5-2015 21:00:00}
   (etc..)
   [1]
   MovieId = 13
   StartTime = {28-5-2015 19:50:00}
   (etc..)
(etc..)

Edit 3: Movie model:

public partial class Movie
{
    public Movie()
    {
        TimeTables = new HashSet<TimeTable>();
    }
    [Key]
    public int MovieId { get; set; }
    public string MovieName { get; set; }
    public int MovieGenre { get; set; }
    public string MoviePicture { get; set; }
    public string MovieDescription { get; set; }
    public string MovieShortText { get; set; }
    public bool? MovieIs3d { get; set; }
    public bool? MovieIsImax { get; set; }
    public int MovieLanguage { get; set; }
    public bool? MovieSubtitled { get; set; }
    public int? MovieMinimalAge { get; set; }
    public bool? MovieHasDrugs { get; set; }
    public bool? MovieHasViolence { get; set; }
    public bool? MovieHasSex { get; set; }
    public bool? MovieHasSwearing { get; set; }
    public bool? MovieIsScary { get; set; }
    public bool? MovieHasDiscrimination { get; set; }
    public string MovieTrailer { get; set; }
    public int MovieLength { get; set; }
    public int? Genre_GenreId { get; set; }
    public int? Language_LanguageId { get; set; }
    public virtual Genre Genre { get; set; }
    public virtual Language Language { get; set; }
    public virtual ICollection<TimeTable> TimeTables { get; set; }
}

TimeTable:

public partial class TimeTable
{
    public TimeTable()
    {
        Reservations = new HashSet<Reservation>();
    }
    public int TimeTableId { get; set; }
    public int MovieId { get; set; }
    public int RoomId { get; set; }
    public int SeatsAvaible { get; set; }
    public DateTime StartTime { get; set; }
    public DateTime EndTime { get; set; }
    public virtual Movie Movie { get; set; }
    public virtual ICollection<Reservation> Reservations { get; set; }
    public virtual Room Room { get; set; }
}

Edit 4: A query on TimeTable to Movie is also possible but then I get multiple movie records because there are more than 1 records in Timetable for each movie, and I'm not so good in query's, but if you have the Solution I would luke to hear :)

Answer 1

Ultimately, I believe the problem is because you are trying to reuse the data classes to hold your View data. It would be easiest to just create a new set of classes, but this might get you by:

public IList<Movie> GetMovieTimeTable(DateTime date)
{
   var result = movierepo.Movies
     .Join(timetablerepo.TimeTables,m=>m.MovieId,tt=>tt.MovieId,
       (m,g)=>new Movie{
         MovieId=m.MovieId,
         ... rest of properties here ...
         TimeTables=g.Where(tt=>tt.StartDate.Date==date.Date).ToList()
       })
     .Where(m=>m.TimeTables.Any())
     .ToList();
   return result;
}