Unity应用程序块，如何参数传递给注塑厂？ [英] Unity Application Block, How pass a parameter to Injection Factory?

问题描述

在这里，我有什么现在

  Container.RegisterType<IUserManager, UserManagerMock>();
  Container.RegisterType<IUser, UserMock>(
                new InjectionFactory(
                    (c) => c.Resolve<IUserManager>().GetUser("John")));

和得到它

Container.Resolve<IProfile>();

我想通过一个名称作为参数传递给工厂，这样我就能够解决用户对象，名称;
事情是这样的：

I want to pass a name as parameter to Factory so that I will be able to resolve user object with name; Something like this:

 Container.Resolve<IProfile>("Jonh");

我怎样才能改变这种情况的类型注册？

How can I change the type registration for this case?

推荐答案

虽然大多数DI框架，拥有先进的功能，做这些类型的注册，我个人而改变我的应用程序的设计来解决这样的问题。这使我的DI配置简单，使代码更容易理解。特别是对于创建依赖于一些上下文中的对象（线程，要求，等等）或者必须明确管理的一生中，我喜欢定义工厂。工厂让这些事情变得更加明确。

While most DI frameworks have advanced features to do these types of registrations, I personally rather change the design of my application to solve such a problem. This keeps my DI configuration simple and makes the code easier to understand. Especially for the creation of objects that depend on some context (thread, request, whatever) or have a lifetime that must be managed explicitly, I like to define factories. Factories make these things much more explicit.

在您的情况，您要为某个用户读取配置文件。这是典型的东西，你想有一个工厂。这里有这样一个例子：

In your situation, you want to fetch a profile for a certain user. This is typically something you would like to have a factory for. Here's an example of this:

// Definition
public interface IProfileFactory
{
    IProfile CreateProfileForUser(string username);
}

// Usage
var profile = Container.Resolve<IProfileFactory>()
    .CreateProfileForUser("John");

// Registration
Container.RegisterType<IProfileFactory, ProfileFactory>();

// Mock implementation
public class ProfileFactory : IProfileFactory
{
    public IProfile CreateProfileForUser(string username)
    {
        IUser user = Container.Resolve<IUserManager>()
            .GetUser(username);

        return new UserProfile(user);
    }
}

我希望这有助于。

I hope this helps.

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