(84) C# .net core 泛型主机

重要接口或类

IHostBuilder 接口的方法

1. ConfigureAppConfiguration

 IHostBuilder ConfigureAppConfiguration(Action<HostBuilderContext, IConfigurationBuilder> configureDelegate);

 

2.ConfigureServices

IHostBuilder ConfigureServices(Action<HostBuilderContext, IServiceCollection> configureDelegate);

 

3.

 

Host 类(Microsoft.Extensions.Hosting下)

 算是只有一个方法  CreateDefaultBuilder

 

 

 

导入包

Microsoft.Extensions.Hosting

 

 

 

控制台使用泛型主机

Program.cs

public class Program
{
    public static void Main(string[] args)
    {
        CreateHostBuilder(args).Build().Run();
    }
    public static IHostBuilder CreateHostBuilder(string[] args) =>
    Host.CreateDefaultBuilder(args)
        .ConfigureAppConfiguration(builder =>
        {
            builder.AddApollo(builder.Build().GetSection("apollo")).AddDefault();
        })
        .ConfigureServices(Services =>
        {
            Services.AddHostedService<Test>();
        });
}

Test.cs

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;

namespace ConsoleTest
{
    internal class Test : IHostedService
    {
        IConfiguration _configuration;
        public Test(IConfiguration configuration, IHostApplicationLifetime appLifetime)
        {
            _configuration = configuration;
            appLifetime.ApplicationStarted.Register(OnStarted);
        }
        private void OnStarted()
        {
            while (true)
            {
                Console.WriteLine(_configuration.GetValue<string>("time"));
                Thread.Sleep(3000);
            }
        }

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

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