How can you inject the service dependency into the controller?

Question

Satya Karki · Answer

https://www.tutorialspoint.com/how-can-we-inject-the-service-dependency-into-the-controller-chash-asp-net-core

Rijwan Ansari · Answer

You can do it following steps. 1. First create your interface and it's implementation. public interface IDateTime {DateTime Now { get; } }public class SystemDateTime : IDateTime {public DateTime Now{get { return DateTime.Now; }} } 2. Configure Service container public void ConfigureServices(IServiceCollection services) {services.AddSingleton ();services.AddControllersWithViews(); } 3. Initiate into constructor of the controller where you want to call. public class HomeController : Controller {private readonly IDateTime _dateTime;public HomeController(IDateTime dateTime){_dateTime = dateTime;}public IActionResult Index(){var serverTime = _dateTime.Now;if (serverTime.Hour That's it. You can refer to Microsoft learn.

Uday Dodiya · Answer

ASP.NET Core injects objects of dependency classes through constructor or method by using built-in IoC container. The built-in container is represented by IServiceProvider implementation that supports constructor injection by default. The types (classes) managed by built-in IoC container are called services. In order to let the IoC container automatically inject our application services, we first need to register them with IoC container. Example public interface ILog{ void info(string str); } class MyConsoleLogger : ILog{ public void info(string str){ Console.WriteLine(str); } } ASP.NET Core allows us to register our application services with IoC container, in the ConfigureServices method of the Startup class. The ConfigureServices method includes a parameter of IServiceCollection type which is used to register application services Register ILog with IoC container in ConfigureServices() method as shown below. public class Startup{ public void ConfigureServices(IServiceCollection services){ services.AddSingleton (); } } Add() method of IServiceCollection instance is used to register a service with an IoC container We have specified ILog as service type and MyConsoleLogger as its instance This will register ILog service as a singleton Now, an IoC container will create a singleton object of MyConsoleLogger class and inject it in the constructor of classes wherever we include ILog as a constructor or method parameter throughout the application.

Aravind Govindaraj · Answer

Hi Naresh, You can use it here in different flavors, It's based on how you would like to set it up. Here we go the options are Constructor Method Property To inject, you have to register in the startup class which eventually binds objects using the Inversion of Control principle.

How can you inject the service dependency into the controller?

Answers (4)