_context code in Controller

Question

    namespace MovieDB.Controllers  
    {  
        public class MovieController : Controller  
        {  
            private readonly MovieContext _context;                                   <- Where did _context come from?  Why not reference actual name of context?  
      
            public async Task<IActionResult> Index(string searchString)  
            {  
                var movies = from m in _context.Movie                                  <- _context referenced here along with Movie Property Set contained / defined within the context.  
                             select m;  
      
                if (!String.IsNullOrEmpty(searchString))  
                {  
                    movies = movies.Where(s => s.Title!.Contains(searchString));  
                }  
      
               return View(await movies.ToListAsync());  
            }  
      
  

Referenced from: https://learn.microsoft.com/en-us/aspnet/core/tutorials/first-mvc-app/search?view=aspnetcore-6.0

Answer 1

Hi @Dean Everhart , Your _context will come from the service you have initialized earlier on your program.cs file as like this builder.Services.AddDbContext<MvcMovieContext>. However, you have to initialize your constructor as well as like this. Would you kindly let me know if you have any further concern.

Answer 2

I'd like to accept answers above but it is not giving me the option to.

Answer 3

Can the following Microsoft tutorial help?

Part 4, add a model to an ASP.NET Core MVC app
https://learn.microsoft.com/en-us/aspnet/core/tutorials/first-mvc-app/adding-model?view=aspnetcore-6.0&tabs=visual-studio

To answer to your question see the sections "Dependency injection" and "Dependency injection in the controller".