unity-container | 易学教程

Can I pass constructor parameters to Unity's Resolve() method?

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I am using Microsoft's Unity for dependency injection and I want to do something like this: IDataContext context = _unityContainer.Resolve<IDataContext>(); var repositoryA = _unityContainer.Resolve<IRepositoryA>(context); //Same instance of context var repositoryB = _unityContainer.Resolve<IRepositoryB>(context); //Same instance of context IDataContext context2 = _unityContainer.Resolve<IDataContext>(); //New instance var repositoryA2 = _unityContainer.Resolve<IRepositoryA>(context2); RepositoryA and RepositoryB both have a constructor that takes an IDataContext parameter, and I want Unity to

How better to resolve dependencies in object created by factory?

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问题 For example I have dependency: public interface IMyDependency { } public class MyDependency : IMyDependency { } That injects in MyClass object: public interface IMyInterface { } public class MyClass : IMyInterface { [Dependency] public IMyDependency MyDependency { get; set; } } Also I have a Factory, that creates MyClass instance: public interface IFactory { IMyInterface CreateMyObject(); } public class Factory : IFactory { public IMyInterface CreateMyObject() { // some checks before creation

Resolving classes without registering them using Castle Windsor

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问题 Take the following useless program: class Program { static void Main(string[] args) { IUnityContainer unityContainer = new UnityContainer(); IWindsorContainer windsorContainer = new WindsorContainer(); Program unityProgram = unityContainer.Resolve<Program>(); Program castleProgram = windsorContainer.Resolve<Program>(); } } The UnityContainer will return me an instance of Program, where as the Windsor container will throw a ComponentNotFoundException. I can see arguments for both behaviours

Using Dependency Injection without any DI Library

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问题 I am new to Repository and DI and trying to implement in my MVC 5 project. I implemented Constructor Injection where in my controller has a constructor like this: IBook _ibook; public Test(IBook ibook) { _ibook = ibook; } Without any DI library, it throws an error: There is no empty constructor. To avoid this, I added one more constructor as below: public Test ():this(new Book()) { } Since I am new to DI, I don't want to risk my project by using DI library which can later throw some error

Configure Unity DI for ASP.NET Identity

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问题 I'm using Unity successfully for all regular constructor injection such as repositories etc., but I can't get it working with the ASP.NET Identity classes. The setup is this: public class AccountController : ApiController { private UserManager<ApplicationUser> _userManager { get; set; } public AccountController(UserManager<ApplicationUser> userManager) { if (userManager == null) { throw new ArgumentNullException("userManager"); } _userManager = userManager; } // ... } with these configs for

Dependency Injection in attributes

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I am trying to inject a dependency into a custom AuthorizeAttribute as follows: public class UserCanAccessArea : AuthorizeAttribute { readonly IPermissionService permissionService; public UserCanAccessArea() : this(DependencyResolver.Current.GetService<IPermissionService>()) { } public UserCanAccessArea(IPermissionService permissionService) { this.permissionService = permissionService; } protected override bool AuthorizeCore(HttpContextBase httpContext) { string AreaID = httpContext.Request.RequestContext.RouteData.Values["AreaID"] as string; bool isAuthorized = false; if (base.AuthorizeCore

MEF vs. any IoC

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问题 Looking at Microsoft\'s Managed Extensibility Framework (MEF) and various IoC containers (such as Unity), I am failing to see when to use one type of solution over the other. More specifically, it seems like MEF handles most IoC type patterns and that an IoC container like Unity would not be as necessary. Ideally, I would like to see a good use case where an IoC container would be used instead of, or in addition to, MEF. 回答1: When boiled down, the main difference is that IoC containers are

Can Unity be made to not throw SynchronizationLockException all the time?

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问题 The Unity dependency injection container has what seems to be a widely known issue where the SynchronizedLifetimeManager will often cause the Monitor.Exit method to throw a SynchronizationLockException which is then caught and ignored. This is a problem for me because I like to debug with Visual Studio set to break on any thrown exception, so every time my application starts up I\'m breaking on this exception multiple times for no reason. How can I prevent this exception from being thrown?

Comparing Castle Windsor, Unity and StructureMap

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问题 In a follow up to Krzysztof’s statement that Windsor does a lot more than other IoC’s, I wanted to understand how these IoC’s stack up against each other and the benefits/additional facilities that castle Windsor provides. Are there any comparisons? Can someone help me understand the additional features that Castle Windsor provides over other IoC’s 回答1: See here and here for a pretty thorough technical comparison of several IoC containers, although somewhat outdated by now (they're from

With Unity how do I inject a named dependency into a constructor?

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问题 I have the IRespository registered twice (with names) in the following code: // Setup the Client Repository IOC.Container.RegisterType<ClientEntities>(new InjectionConstructor()); IOC.Container.RegisterType<IRepository, GenericRepository> (\"Client\", new InjectionConstructor(typeof(ClientEntities))); // Setup the Customer Repository IOC.Container.RegisterType<CustomerEntities>(new InjectionConstructor()); IOC.Container.RegisterType<IRepository, GenericRepository> (\"Customer\", new