c# - 如何在 Autofac 中间接传递参数

Question

我有一个通过Func<Owned<OwnedDependency>>. 它的一个依赖项需要一个参数，我只会在构造 OwnedDependency 时使用该参数。

public class OwnedDependency
{
    public OwnedDependency(IDependency1 dependency)
    {
    }
}

public interface IDependency1
{
}

public class Dependency1 : IDependency1
{
    public Dependency1(MyParameter parameter)
    {
    }
}

public class MyClass
{
    private readonly Func<Owned<OwnedDependency>> m_ownedDependencyFactory;

    public MyClass(Func<Owned<OwnedDependency>> ownedDependencyFactory)
    {
        m_ownedDependencyFactory = ownedDependencyFactory;
    }

    public void CreateOwnedDependency()
    {
        var parameter = new MyParameter(...);
        // ** how to setup parameter with the container? **

        using (var ownedDependency = m_ownedDependencyFactory())
        {
        }
    }
}

我无法找到一种干净的方式来设置 MyParameter 的实例。

我探索的一种方法是将 ILifetimeScope 注入 MyClass ，然后执行以下操作：

var parameter = new MyParameter(...);

using (var newScope = m_lifetimeScope.BeginLifetimeScope())
{
    newScope.Resolve<IDependency1>(new TypedParameter(typeof(MyParameter), parameter));
    var ownedDependency = newScope.Resolve<OwnedDependency>();
    // ...
}

但是容器变得不必要的侵入性。理想情况下，我想做的是注入Func<IDependency1, Owned<OwnedDependency>>并且容器愿意使用传入的参数来满足任何必要的依赖关系，而不仅仅是 OwnedDependency 上的那些。

Answer 1

如何使用另一个工厂分两步解决IDependency1：

public class MyClass
{
    private Func<MyParameter, IDependency1> dependency1Factory;
    private Func<IDependency1, Owned<OwnedDependency>> ownedDependencyFactory;


    public MyClass(
        Func<MyParameter, IDependency1> dependency1Factory,
        Func<IDependency1, Owned<OwnedDependency>> ownedDependencyFactory)
    {
        this.dependency1Factory = dependency1Factory;
        this.ownedDependencyFactory = ownedDependencyFactory;
    }

    public void CreateOwnedDependency()
    {
        var parameter = new MyParameter();
        using (var owned = ownedDependencyFactory(dependency1Factory(parameter)))
        {
        }

    }
}