控制台应用程序上的 .NET Core DI 记录器未登录到控制台

Question

我有一个 .NET Core 控制台应用程序。很简单。在这一点上，目标只是让 DI 和配置集成。但是，LogDebug没有登录到控制台。

我在这里可能做错了什么？

class Program
{
    static void Main(string[] args)
    {
        var topic = Environment.GetEnvironmentVariable("RECEIVER_TOPIC");
        var entity = Environment.GetEnvironmentVariable("RECEIVER_ENTITY");

        //setup our DI
        var serviceProvider = new ServiceCollection()
            .AddLogging()
            .BuildServiceProvider();

        //configure console logging
        serviceProvider
            .GetService<ILoggerFactory>()
            .AddConsole(LogLevel.Debug);

        var logger = serviceProvider
            .GetService<ILoggerFactory>()
            .CreateLogger<Program>();
        logger.LogDebug($"Starting application. Topic: {topic}. Entity: {entity}.");

        if (Debugger.IsAttached)
        {
            Console.ReadLine();
        }
    }

    static IConfigurationRoot GetConfiguration()
    {
        var builder = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);

        return builder.Build();
    }
}

更新 1

我添加了Microsoft.Extensions.Logging.DebugNuGet 包，并修改了serviceProvider初始化以附加AddDebug如下内容：

serviceProvider
    .GetService<ILoggerFactory>()
    .AddConsole(LogLevel.Debug)
    .AddDebug();

但它甚至没有记录到Debug窗口。

Answer 1

得到它的工作。我认为关键是我还不清楚需要注册混凝土，因为我认为扩展是注册混凝土。

class Program
{
    static void Main(string[] args)
    {
        var topic = Environment.GetEnvironmentVariable("RECEIVER_TOPIC");
        var entity = Environment.GetEnvironmentVariable("RECEIVER_ENTITY");

        // Create service collection
        var serviceCollection = new ServiceCollection();
        ConfigureServices(serviceCollection);

        // Create service provider
        var serviceProvider = serviceCollection.BuildServiceProvider();

        var logger = serviceProvider
            .GetRequiredService<ILoggerFactory>()
            .CreateLogger<Program>();
        logger.LogDebug($"Starting application. Topic: {topic}. Entity: {entity}.");

        if (Debugger.IsAttached)
        {
            Console.ReadLine();
        }
    }

    static void ConfigureServices(IServiceCollection serviceCollection)
    {
        // Add logging
        serviceCollection.AddSingleton<ILoggerFactory, LoggerFactory>();
        serviceCollection.AddSingleton(typeof(ILogger<>), typeof(Logger<>));
        serviceCollection.AddLogging(loggingBuilder => loggingBuilder
            .AddConsole()
            .AddDebug()
            .SetMinimumLevel(LogLevel.Debug));

        // Build configuration
        var configuration = new ConfigurationBuilder()
            .SetBasePath(AppContext.BaseDirectory)
            .AddJsonFile("appsettings.json", false)
            .Build();

        // Add access to generic IConfigurationRoot
        serviceCollection.AddSingleton(configuration);
    }
}