自有服务 - 没有注册类型服务

Question

I would like to use Hangfire in my ASP.NET Core app, bu I have got error message:

No service for type has been registered

Here's my code: Service:

public class MyService: IMyService
{
    private readonly MyContext _context;

    public MyService(MyContext context)
    {
        _context = context;
    }

    // some code
}

public interface IMyService
{
      //some code
}

In Startup.cs:

public void ConfigureServices(IServiceCollection services)
{
    services.AddSingleton<IMyService, MyService>();
    // another services
}

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, IServiceProvider serviceProvider)
{
    app.UseHangfireDashboard();
    app.UseHangfireServer();

    RecurringJob.AddOrUpdate(() => serviceProvider.GetService<IMyService>().MyMethod(), Cron.Minutely);
}

Do you have any idea why service is not registered?

Answer 1

Hangfire hooks into the dependency injection already in place so you don't need to use serviceProvider.GetService to get your object. Instead use the appropriate Hangfire function to let it resolve the dependency:

RecurringJob.AddOrUpdate<IMyService>(s => s.MyMethod(), Cron.Minutely);