simple-injector - w3toppers.com

Constructor injection with Quartz.NET and Simple Injector

According to this blog post, you would need to implement a custom IJobFactory, like this: public class SimpleInjectorJobFactory : IJobFactory { private readonly Container container; private readonly Dictionary<Type, InstanceProducer> jobProducers; public SimpleInjectorJobFactory( Container container, params Assembly[] assemblies) { this.container = container; // By creating producers, jobs can be decorated. var transient = Lifestyle.Transient; this.jobProducers = … Read more

Simple Injector: Register ILogger by using ILoggerFactory.CreateLogger()

Use the following registrations: container.RegisterInstance<ILoggerFactory>(loggerFactory); container.RegisterSingleton(typeof(ILogger<>), typeof(Logger<>)); Or, in case you are integrating Simple Injector into a generic host or ASP.NET Core application, make use of the .AddLogging() extension method to even inject a non-generic ILogger into your application components, as demonstrates in this ASP.NET Core Startup class: public class Startup { … public void … Read more

log4net with DI Simple Injector

There’s nothing special about Simple Injector when it comes to configuring log4net. For instance, you can register ILog as follows: container.RegisterSingleton<ILog>(LogManager.GetLogger(typeof(object))); Obviously this registered a single logger for the complete application. In case you want to inject a different logger per class, you will have to define your own adapter implementation: public sealed class Log4NetAdapter<T> … Read more

Using DI container in unit tests

For true unit tests (i.e. those which only test one class, and mock all of its dependencies), it doesn’t make any sense to use a DI framework. In these tests: if you find that you have a lot of repetitive code for newing up an instance of your class with all the mocks you’ve created, … Read more

Register IAuthenticationManager with Simple Injector

As TrailMax already mentioned, the exception you got probably got raised during the call to container.Verify(). At application start-up time there is no HttpContext, hence the exception. Although the removal of the call to container.Verify() will ‘solve’ the problem, I would advise against doing this and I will suggest a better solution below. NightOwl888 references … Read more

How to register Windows Forms with Simple Injector

Ideally, you would want to register your forms as Singleton. In my experience, however, this will result in hard to debug errors, especially when you use a BindingSource for binding your data to whatever. A second problem with using Singleton as the lifestyle is that if your application uses modeless windows, this windows will throw … Read more

Using Simple Injector with Unit Of Work & Repository Pattern in Windows Form

The problem you have is the difference in lifestyles between your service, repository, unitofwork and dbcontext. Because the MemberRepository has a Singleton lifestyle, Simple Injector will create one instance which will be reused for the duration of the application, which could be days, even weeks or months with a WinForms application. The direct consequence from … Read more

Avoiding all DI antipatterns for types requiring asynchronous initialization

This is a long answer. There’s a summary at the end. Scroll down to the summary if you’re in a hurry. The problem you have, and the application you’re building, is a-typical. It’s a-typical for two reasons: you need (or rather want) asynchronous start-up initialization, and Your application framework (azure functions) supports asynchronous start-up initialization … Read more

Simple Injector unable to inject dependencies in Web API controllers

TLTR: the problem is caused by the implicit way Web API handles resolving controller types; register your Web API controllers explicitly and you’ll see where the problem is. Here is a step by step what is happening under the covers: The System.Web.Http.DefaultHttpControllerActivator calls into the SimpleInjectorWebApiDependencyResolver and requests the creation of an API controller. SimpleInjectorWebApiDependencyResolver … Read more