AspNetCore.Docs/aspnetcore/includes/mvc-intro/search3.md

Now when you submit a search, the URL contains the search query string. Searching will also go to the HttpGet Index action method, even if you have a HttpPost Index method.

The following markup shows the change to the form tag:

<form asp-controller="Movies" asp-action="Index" method="get">

Adding Search by Genre

Add the following MovieGenreViewModel class to the Models folder:

[!code-csharpMain]

The movie-genre view model will contain:

• A list of movies.
• A SelectList containing the list of genres. This will allow the user to select a genre from the list.
• movieGenre, which contains the selected genre.

Replace the Index method in MoviesController.cs with the following code:

[!code-csharpMain]

The following code is a LINQ query that retrieves all the genres from the database.

[!code-csharpMain]

The SelectList of genres is created by projecting the distinct genres (we don't want our select list to have duplicate genres).

movieGenreVM.genres = new SelectList(await genreQuery.Distinct().ToListAsync())

Adding search by genre to the Index view

Update Index.cshtml as follows:

[!code-HTMLMain]

Test the app by searching by genre, by movie title, and by both.