Are these usages of LINQ's Find and Single methods with lambda expression are equal?

Asked Jun 25 '14 at 16:41

Active Jun 25 '14 at 16:55

Viewed 46 times

I follow this tutorial: http://www.asp.net/mvc/tutorials/mvc-music-store/mvc-music-store-part-4

The author uses Single method:

public ActionResult Browse(string genre)//AUTHOR'S CODE
{
    // Retrieve Genre and its Associated Albums from database
    var genreModel = storeDB.Genres.Include("Albums").Single(g => g.Name == genre);

    return View(genreModel);
}

and Find method:

public ActionResult Details(int id)//AUTHOR'S CODE
{
    var album = storeDB.Albums.Find(id);

    return View(album);
}

By analogy to Browse()(first example) method I wanted to use Single method again so I wrote:

public ActionResult Details(int id) 
{ //MY CODE
    Album album = storeDB.Albums.Single(a => a.AlbumId == id);
    return View(album);
}

Question: Does var album = storeDB.Albums.Find(id); and Album album = storeDB.Albums.Single(a => a.AlbumId == id); works in different way? The result seems to be the same.

edited Jun 25 '14 at 16:55

user3757742

asked Jun 25 '14 at 16:41

Yoda

17,363
67
204
344

The "duplicate" does not refer to my question. – Yoda Jun 25 '14 at 16:59
read the first answer, it covers the differences between Find and Single (among others) – ken2k Jun 25 '14 at 17:04
@ken2k It does not refer to correctness of my lambda expression. – Yoda Jun 25 '14 at 17:09
While in the case that you outlined everything will produce results that are effectively the same -- the underlying behavior of the two methods is significantly different. – Ian P Jun 25 '14 at 17:16
You could always check the IL to find out if they do, in fact, work the same way. – Wayne Werner Jun 25 '14 at 17:18

Are these usages of LINQ's Find and Single methods with lambda expression are equal?

0 Answers0