.net 8 DI GetServices<object> not working

Question

In one of my services I need to get all provided services. So I tried:

public ServiceConstructor(IServiceProvider serviceProvider) {
    _serviceProvider = serviceProvider;
    var allServices = _serviceProvider.GetServices<object>();

But I always get no services returned. If I ask for a specific service this one is returned, so there are registered services.

I even tried to inherit all my services from a single interface I am asking for instead of , but with no success.

Answer 1

I dont' thinks get all services is a good idea, but you could try this get type names from assembly first.

    [Route("api/[controller]")]
    [ApiController]
    public class ValuesController : ControllerBase
    {

        private readonly IServiceProvider serviceProvider;

        public ValuesController(IServiceProvider serviceProvider)
        {

            this.serviceProvider = serviceProvider;
        }
        [HttpGet]
        public void test()
        {
            
            var types = AppDomain.CurrentDomain.GetAssemblies()
                 .SelectMany(s => s.GetTypes())
                 .ToList();
            foreach(var type in types)
            {
                try
                {
                    var instance = serviceProvider.GetService(type);
                    if (instance != null)
                    {
                        Console.WriteLine(instance.ToString());
                    }
                }
                catch
                {

                }
            }
        }
    }

Test