Filter search box c#

index.cs

 *******************Example of search by title and genre ********************
 
 
 public class MovieController : Controller 
  {
  private MovieDBContext db = new MovieDBContext();
  
  public ActionResult Index(string movieGenre, string searchString)
        {
            var GenreLst = new List<string>();

            var GenreQry = from d in db.Movies
                           orderby d.Genre
                           select d.Genre;

            GenreLst.AddRange(GenreQry.Distinct());
            ViewBag.movieGenre = new SelectList(GenreLst);

            var movies = from m in db.Movies
                         select m;

            if (!string.IsNullOrEmpty(searchString))
            {
                movies = movies.Where(S => S.Title.Contains(searchString));
            }

            if (!string.IsNullOrEmpty(movieGenre))
            {
                movies = movies.Where(x => x.Genre == movieGenre);
            }
            return View(movies);
        }
        
    }
    
    
    ****************htlm markup************
    
<p>
    @Html.ActionLink("Create New", "Create")
    @using (Html.BeginForm())
    {
        <p>            
            Title: @Html.TextBox("searchString") 
            Genre: @Html.DropDownList("movieGenre", "All")
            <br />
            <br />
            <input type="submit"  value="Filter" />            
        </p>
    }
</p>