inversion-of-control

问题 Background I'm building a winforms application where I am using an IoC container (SimpleInjector) to register my types. In my application, a majority of the screens (i.e. forms) will only have one instance at any given time. Problem For forms that only need one instance at any given time, I can register them as singletons: container.Register<IHomeView, HomeView>(Lifestyle.Singleton); This allows me to use the container to keep track of all forms. In this case, however, when a form gets closed

问题 My understanding: A dependency is when an instance of ClassA requires an instance of ClassB to instantiate a new instance of ClassA. A dependency injection is when ClassA is passed an instance of ClassB, either through a parameter in ClassA's constructor or through a set~DependencyNameHere~(~DependencyNameHere~ $param) function. (This is one of the areas I'm not completely certain on) . An IoC container is a singleton Class(can only have 1 instance instantiated at any given time) where the

问题 I currently creating some experimental projects with nodejs. I have programmed a lot Java EE web applications with Spring and appreciated the ease of dependency injection there. Now I am curious: How do I do dependency injection with node? Or: Do I even need it? Is there a replacing concept, because the programming style is different? I am talking about simple things, like sharing a database connection object, so far, but I have not found a solution that satisfies me. 回答1: In short, you don't

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问题 I have tried almost everything, but I cannot get AutoMapper to map A => B when B doesn't have a parameterless constructor . I'm using Unity and all the dependencies are registered conveniently but, how do I say to AutoMapper "hey, if the target instance needs some dependency in the constructor, ask Unity to build it, and do the mapping later. I've tried with Mapper.Initialize(configuration => { configuration.ConstructServicesUsing(container.Resolve); configuration.CreateMap<Person,

问题 In my project I register many ISerializers implementations with the assembly scanner. FWIW this is the code that registers my ISerializers Scan(scanner => { scanner.AssemblyContainingType<ISerializer>(); scanner.AddAllTypesOf<ISerializer>().NameBy(type => type.Name); scanner.WithDefaultConventions(); }); Which then correctly registers ISerializer (...ISerializer) Scoped as: Transient JsonSerializer Configured Instance of ...JsonSerializer BsonSerializer Configured Instance of ..

问题 I don't think this was asked before, although it's really hard to search for a term like unit test ioc container and not find a question about how to implement IoC in order to perform unit tests. I would like to have unit tests against the IoC container itself basically because sometimes I have issues with the container (like you could with any other part of an application), and it's pretty troublesome to test the resolution of dependencies merely debugging. If I could introduce unit tests

问题 How to transfer beans from one ClassPathXMLApplicationContext to another? I create one context like this ClassPathXMLApplicationContext myOneContext = new ClassPathXMLApplicationContext("path to my xml bean definitions"); // It loads 10 beans which probably refer each other ClassPathXMLApplicationContext my2ndContext = new ClassPathXMLApplicationContext("path to my xml bean definitions"); // It loads 2 beans, which probably refer each other is it possible to transfer all beans from

问题 I am trying to solve this case in our code where I need to resolve the dependency at runtime based on a specific condition, such as if certain query string value exist or not. Let say I have a controller AuthenticationController and I have authentication service having two flavours of it. public class AuthenticationController { private readonly IAuthenticationService authenticationService; public AuthenticationController(IAuthenticationService authenticationService) { this

问题 I am in the process of retrofitting unit tests for a asp.net solution written in VB.Net and c#. The unit tests need to verify the current functionality and act as a check for future breaking changes. The solution comprises of: 1 MVC web project written in vb.net (don't ask, it's a legacy thing) 10 other supporting projects each containing logically grouped functionality written in C#, each project contains repositories and DAL All the classes are tightly coupled as there is no inversion of