在.NET中启动Windows背景服务的参数

Question

我正在使用.NET的backgroundService摘要类制作Windows服务（类似于 Microsoft撰写的本教程），但我似乎无法弄清楚如何使用Windows Services应用程序开始使用Windows Services应用程序传递给服务的参数。有人可以告诉我如何获得我在那里经历的论点还是我应该做什么？

Answer 1

您必须从main：

public static async Task Main(string[] args)
{
    IHost host = Host.CreateDefaultBuilder(args)
        .ConfigureLogging(options =>
        {
            options.ClearProviders();
            options.AddEventLog();
            options.AddConsole();
        })
        .UseWindowsService(options =>
        {
            options.ServiceName = "WorkerServiceTestArgs";
        })
        .ConfigureServices(services =>
        {
            services.AddSingleton(new MyArgsService(args));
            services.AddHostedService<Worker>();
        })
        .Build();

    await host.RunAsync();
}

您的工作人员对您的服务有一个依赖性：

public class Worker : BackgroundService
{
    private readonly ILogger<Worker> _logger;
    private readonly MyArgsService _myArgsService;

    public Worker(ILogger<Worker> logger, MyArgsService myArgsService)
    {
        _logger = logger;
        _myArgsService = myArgsService;
    }

    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        while (!stoppingToken.IsCancellationRequested)
        {
            _logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
            _logger.LogInformation("Args: {args}", string.Join(";", _myArgsService.GetArgs()));

            await Task.Delay(1000, stoppingToken);
        }
    }
}

EG使用此简单服务：

public class MyArgsService
{
    private readonly string[] _args;

    public MyArgsService(string[] args)
    {
        _args = args;
    }

    public string[] GetArgs()
    {
        return _args;
    }
}

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Answer 2

创建一个从servicebase派生的类以接收参数并实现ihostlifetime。

public class MyServiceLifetime : ServiceBase, IHostLifetime
{
    protected override void OnStart(string[] args)
    {
        base.OnStart(args);
    }

    public public Task WaitForStartAsync(CancellationToken cancellationToken)
        => Task.CompletedTask;
    
    public Task StopAsync(CancellationToken cancellationToken)
        => Task.CompletedTask;
}

用useWindowsService替换此类。

using IHost host = Host.CreateDefaultBuilder(args)
    .ConfigureServices(services =>
    {
        services.AddSingleton<IHostLifetime, MyServiceLifetime>();
        services.AddSingleton<JokeService>();
        services.AddHostedService<WindowsBackgroundService>();
    })
    .Build();