C# 如何在console应用程序中配置ConsoleLogger？

我正在尝试使用.NET CORE 3.1构建一个控制台应用程序，但在注入控制台记录器时遇到问题

在最近的版本中，日志记录的注入方式似乎发生了显著的变化，各种风格的教学教程似乎都不符合我的意图

我有一个界面：

public interface IMyDoer
{
    void DoSomething();
}

我想在其中注入一个ILogger的类：

public class MyDoer : IMyDoer
{
    private readonly ILogger logger;
    public MyDoer(ILogger logger)
    {
        this.logger = logger;
    }

    public void DoSomething()
    {
        this.logger.Log(LogLevel.Information, "Doing something");
    } 
}

然后是Main（），在这里我试图配置DI容器来构造Doer对象，配置ILogger来登录控制台

public class Program
{
    public static void Main(string[] args)
    {
        var serviceCollection = new ServiceCollection();
        ConfigureServices(serviceCollection);

        var serviceProvider serviceCollection.BuildServiceProvider();

        var myDoer = serviceProvider.GetService<IMyDoer>();

        myDoer.DoSomething();
    }

    private static void ConfigureServices(ServiceCollection serviceCollection)
    {
        serviceCollection.AddLogging(configure => {
            configure.AddConsole();
        });

        serviceCollection.AddSingleton<IMyDoer, MyDoer>();
    }
}

---

关于我应该如何做这件事有什么想法吗？

ILogger

未在ASP.NET Core DI容器中注册。请改用

ILogger

：

public class Program
{
    static void Main(string[] args)
    {
        var serviceCollection = new ServiceCollection();
        ConfigureServices(serviceCollection);

        using (var serviceProvider = serviceCollection.BuildServiceProvider())
        using (var loggerFactory = LoggerFactory.Create(builder => builder.AddConsole()))
        {
            var myDoer = serviceProvider.GetService<IMyDoer>();

            myDoer.DoSomething();
        }
    }

    private static void ConfigureServices(ServiceCollection serviceCollection)
    {
        serviceCollection
            .AddSingleton<IMyDoer, MyDoer>();
    }
}

System.InvalidOperationException
  HResult=0x80131509
  Message=Unable to resolve service for type 'Microsoft.Extensions.Logging.ILogger' while attempting to activate 'MyDoer.DoSomething'.
  Source=Microsoft.Extensions.DependencyInjection

public class MyDoer : IMyDoer
{
    private readonly ILogger<MyDoer> logger;

    public MyDoer(ILogger<MyDoer> logger)
    {
        this.logger = logger;
    }

    // ...
}

public class MyDoer : IMyDoer
{
    private readonly ILogger logger;

    public MyDoer(ILoggerFactory loggerFactory)
    {
        this.logger = loggerFactory.CreateLogger("YourCategory");
    }

    // ...
}