private void UpdateMovieGenres(string[] selectedGenres, Movie movieToUpdate)
{
if (selectedGenres == null)
{
movieToUpdate.GenreAssigns = new List <GenreAssign>();
return;
}
var selectedGenreHS = new HashSet <string>(selectedGenres);
var movieGenres = new HashSet <int>
(movieToUpdate.GenreAssigns.Select(c => c.Genre.GenreID));
foreach (var genre in _context.Genres)
{
if (selectedGenreHS.Contains(genre.GenreID.ToString()))
{
if (!movieGenres.Contains(genre.GenreID))
{
movieToUpdate.GenreAssigns.Add(new GenreAssign {
MovieID = movieToUpdate.MovieID, GenreID = genre.GenreID
});
}
}
else
{
if (movieGenres.Contains(genre.GenreID))
{
GenreAssign genreToRemove = movieToUpdate.GenreAssigns.FirstOrDefault(i => i.GenreID == genre.GenreID);
_context.Remove(genreToRemove);
}
}
}
}
public async Task <IActionResult> Create([Bind("MovieName, CreationDate, Active")] Movie movie, string[] selectedGenres)
{
if (selectedGenres != null)
{
movie.GenreAssigns = new List <GenreAssign>();
foreach (var genre in selectedGenres)
{
var genreToAdd = new GenreAssign {
MovieID = movie.MovieID, GenreID = int.Parse(genre)
};
movie.GenreAssigns.Add(genreToAdd);
}
}
if (ModelState.IsValid)
{
_context.Add(movie);
await _context.SaveChangesAsync();
return(RedirectToAction(nameof(Index)));
}
PopulateAssignedGenreData(movie);
return(View(movie));
}
