c# - 自托管 .NET Core 控制台应用程序中的 Startup.cs

Question

我有一个自托管的 .NET Core 控制台应用程序。

Web 显示了 ASP.NET Core 的示例，但我没有 Web 服务器。只是一个简单的命令行应用程序。

是否可以为控制台应用程序做这样的事情？

public static void Main(string[] args)
{
    // I don't want a WebHostBuilder. Just a command line

    var host = new WebHostBuilder()
        .UseKestrel()
        .UseContentRoot(Directory.GetCurrentDirectory())
        .UseIISIntegration()
        .UseStartup<Startup>()
        .Build();

    host.Run();
}

我想像在 ASP.NET Core 中一样使用 Startup.cs，但在控制台上。

我该怎么做？

Answer 1

所以我想到了这个解决方案，灵感来自公认的答案:

程序.cs

public class Program
{
    public static void Main(string[] args)
    {
        IServiceCollection services = new ServiceCollection();
        // Startup.cs finally :)
        Startup startup = new Startup();
        startup.ConfigureServices(services);
        IServiceProvider serviceProvider = services.BuildServiceProvider();

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

        var logger = serviceProvider.GetService<ILoggerFactory>()
            .CreateLogger<Program>();

        logger.LogDebug("Logger is working!");

        // Get Service and call method
        var service = serviceProvider.GetService<IMyService>();
        service.MyServiceMethod();
    }
}

启动.cs

public class Startup
{
    IConfigurationRoot Configuration { get; }

    public Startup()
    {
        var builder = new ConfigurationBuilder()
            .AddJsonFile("appsettings.json");

        Configuration = builder.Build();
    }

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddLogging();
        services.AddSingleton<IConfigurationRoot>(Configuration);
        services.AddSingleton<IMyService, MyService>();
    }
}

应用设置.json

{
    "SomeConfigItem": {
        "Token": "8201342s223u2uj328",
        "BaseUrl": "http://localhost:5000"
    }
}

我的服务.cs

public class MyService : IMyService
{
    private readonly string _baseUrl;
    private readonly string _token;
    private readonly ILogger<MyService> _logger;

    public MyService(ILoggerFactory loggerFactory, IConfigurationRoot config)
    {
        var baseUrl = config["SomeConfigItem:BaseUrl"];
        var token = config["SomeConfigItem:Token"];

        _baseUrl = baseUrl;
        _token = token;
        _logger = loggerFactory.CreateLogger<MyService>();
    }

    public async Task MyServiceMethod()
    {
        _logger.LogDebug(_baseUrl);
        _logger.LogDebug(_token);
    }
}

IMyService.cs

public interface IMyService
{
    Task MyServiceMethod();
}