实现原理 : 使用 IHostedService 和 BackgroundService 基类

官方文档

创建控制台应用

   class Program
    {
        static void Main(string[] args)
        {
            Host.CreateDefaultBuilder().ConfigureServices((builder, services) =>
            {
                var config = builder.Configuration;

                services.Configure<MyOptions>(options => config.Bind(options));

                services.AddSingleton<MyDemo>();

                services.AddHostedService<Worker>();  //参考下方的两个Worker例子
            })
            .ConfigureHostConfiguration(buider =>
             {
                 buider.AddJsonFile("./appsettings.json");//如果你的worker类继承自BackgroundService则不需要该操作
             })
            .Build()
            .Run();
        }
    }

worker类继承自IHostedService

• 最原始的接口，自己将作为builder （例如：手动设置appsettings.json）

    public class Worker1 : IHostedService //这是最原始的接口
    {
        private readonly ILogger _logger;
        private readonly IHostApplicationLifetime _lifetime;

        public Worker1(ILogger<Worker1> logger,
            IHostApplicationLifetime lifetime)
        {
            _logger = logger;
            _lifetime = lifetime;
        }

        public Task StartAsync(CancellationToken cancellationToken)
        {
            _logger.LogInformation("PHP是世界上最好的语言");
            _lifetime.StopApplication();
            return Task.CompletedTask;
        }

        public Task StopAsync(CancellationToken cancellationToken)
        {
            return Task.CompletedTask;
        }
    }

worker类继承自BackgroundService

  public class Worker2 : BackgroundService //这是实现部分功能的抽象类
    {
        private readonly ILogger _logger;
        private readonly IHostApplicationLifetime _lifetime;

        public Worker2(ILogger<Worker2> logger,
            IHostApplicationLifetime lifetime)
        {
            _logger = logger;
            _lifetime = lifetime;
        }

        protected override Task ExecuteAsync(CancellationToken stoppingToken)
        {
            _logger.LogInformation("PHP是世界上最好的语言");
            _lifetime.StopApplication();
            return Task.CompletedTask;
        }
    }