Question

I am getting the error :

LINQ to Entities does not recognize the method ‘PagedList.IPagedList1[MvcMusicStore.Models.Album] ToPagedList[Album](System.Collections.Generic.IEnumerable1[MvcMusicStore.Models.Album], Int32, Int32)’ method, and this method cannot be translated into a store expression

For my following controller action :

    public ActionResult Browse(string genre, int?page)
    {
        // Retrieve Genre and its Associated Albums from database
        int pageIndex = page ?? 1;
        var genreModel = storeDB.Genres.Where(g => g.Name == genre)
                                       .Select(g => new GenreAlbumView
                                       {
                                           ID = g.GenreId,
                                           Name = g.Name,
                                           Albums = g.Albums.ToPagedList(pageIndex, PageSize)
                                       }).SingleOrDefault();
        return View(genreModel);
    }

What can be the reason and solution to this problem ?

Answer 1

First run your genermodel query:

var genreModel = storeDB.Genres.Where(g => g.Name == genre).SingleOrDefault();

Then run your select.

Because lin2entity has limited functionality support and can’t convert your function:

g.Albums.ToPagedList(pageIndex, PageSize)

to appropriated sql command, in fact it can’t create related expression tree for it, so you should first get entities and then select as a way you want.

If you should do such a paging in DB, create a stored procedure and use it.