废话少说，直接上代码
首先我们得有一个接口类和一个实现类，方便后面注入MVC里
接口类
???public interface IWeatherProvider ???{ ???????List<WeatherForecast> GetForecasts(); ???}实现类
public class WeatherProviderFake : IWeatherProvider ???{ ???????private string[] Summaries = new[] ???????{ ???????????"Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching" ???????}; ???????private List<WeatherForecast> WeatherForecasts { get; set; } ???????public WeatherProviderFake() ???????{ ???????????Initialize(50); ???????} ???????private void Initialize(int quantity) ???????{ ???????????var rng = new Random(); ???????????WeatherForecasts = Enumerable.Range(1, quantity).Select(index => new WeatherForecast ???????????{ ???????????????DateFormatted = DateTime.Now.AddDays(index).ToString("d"), ???????????????TemperatureC = rng.Next(-20, 55), ???????????????Summary = Summaries[rng.Next(Summaries.Length)] ???????????}).ToList(); ???????} ???????public List<WeatherForecast> GetForecasts() ???????{ ???????????return WeatherForecasts; ???????}Startup.cs
???????// This method gets called by the runtime. Use this method to add services to the container. ???????public void ConfigureServices(IServiceCollection services) ???????{ ???????????services.AddMvc(); ???????????// Simple example with dependency injection for a data provider. ???????????services.AddSingleton<IWeatherProvider, WeatherProviderFake>(); ???????}这样IWeatherProvider就被注入到了mvc里，我们可以在控制器构造函数里这么使用了
???????private readonly IWeatherProvider _weatherProvider; ???????public HelloController(IWeatherProvider weatherProvider) ???????{ ???????????this._weatherProvider = weatherProvider; ???????}源码暂不开源，有需要看的可以留邮箱。
完美！！！
【.netcore基础】MVC制器Controller依赖注入
原文地址：https://www.cnblogs.com/jhli/p/9086674.html