.net - 温莎城堡3(CaSTLe Windsor 3)，构造函数参数为字符串

Question

我以前从未使用过Windsor，但曾经使用过其他DI框架，此刻我遇到了一个相当奇怪的问题。

我有一个工厂类，该工厂类在其构造函数中使用字符串，但是，每当尝试解析该对象时，我都会收到一条异常消息:

Handler for System.String was not found.

<Message>Handler for System.String was not found.</Message>
<StackTrace>at Castle.MicroKernel.Resolvers.DefaultDependencyResolver
     .TryGetHandlerFromKernel(DependencyModel dependency, CreationContext context) 
     in d:\60b7fa65294e7792\src\Castle.Windsor\MicroKernel\Resolvers\DefaultDependencyResolver.cs:line 403
at Castle.MicroKernel.Resolvers.DefaultDependencyResolver.ResolveCore(CreationContext context, ComponentModel model, DependencyModel dependency) in d:\60b7fa65294e7792\src\Castle.Windsor\MicroKernel\Resolvers\DefaultDependencyResolver.cs:line 270</StackTrace>
<Type>Castle.MicroKernel.Handlers.HandlerException</Type>
</InnerException>
<Message>Missing dependency.
Component SomeExampleFactory has a dependency on System.String, which could not be 
resolved.
Make sure the dependency is correctly registered in the container as a service, or 
provided as inline argument.</Message>

该类如下所示:

public interface IDummyFactory
{
    void DoSomething();
}

public class DummyFactory : IDummyFactory
{
    private string someString;

    public DummyFactory(string someConstructorArg)
    {
        someString = someConstructorArg;
    }
}

使用以下DI设置:

var someString = "some constructor arg";
_container.Register(Component.For<IDummyFactory>()
                             .ImplementedBy<DummyFactory>()
                             .DependsOn(someString));

我假设它正在尝试进行某种类型的转换或格式化，从而导致其爆炸，但是由于类型本身是字符串，并且变量以字符串形式传递...甚至可能是这种情况正在尝试映射该变量的类型，而不是变量内容，但是我对DI框架和该领域的文档了解得不够多

Answer 1

尝试调用DependsOn重载，该重载采用键/值对的IDictionary来指定依赖项:

_container.Register(
    Component.For<IDummyFactory>()
        .ImplementedBy<DummyFactory>()
        .DependsOn(new Hashtable 
        { 
            { "someConstructorArg", "some constructor arg" }
        }));