Learn ASP.NET Core MVC: Be ready next week using Visual Studio 2017 by Arnaud Weil
Author:Arnaud Weil [Weil, Arnaud]
Language: eng
Format: azw3
Publisher: leanpub.com
Published: 2017-07-05T04:00:00+00:00
Now we can request that service in a controller and use it in an action:
public class HomeController : Controller { IFileStorage fileStorage; public HomeController(IFileStorage fileStorage) { this.fileStorage = fileStorage; } public IActionResult ListFiles() { string directory = @"c:\"; fileStorage.ChangeDirectory(directory); var files = fileStorage.GetCurrentFiles(); var vm = new ListFilesViewModel( directory, files ); return View(vm); } }
As such, our code would result in an error: we need to instruct the DI system about how an instance of IFileStorage should be created. So we add the following code to the Startup.ConfigureServices method:
public void ConfigureServices( IServiceCollection services) { services.AddTransient<IFileStorage, FileStorageService>(); }
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