使用接口将泛型委托转换为另一种类型 [英] Casting generic delegates to another type with interfaces

问题描述

（使用.NET 4.0）
好​​的，所以我有

(Using .NET 4.0) Ok, so I have

private Dictionary<int, Action<IMyInterface, IMyInterface>> handler {get; set;}

public void Foo<T, U>(Action<T, U> myAction)
    where T : IMyInterface
    where U : IMyInterface
    {
        // | This line Fails
        // V
        Action<IMyInterface, IMyInterface> anotherAction = myAction;
        handler.Add(someInt, anotherAction);
    }

我正尝试将委托存储在通用集合中，因此我可以稍后将其拉出以调用它。
如何正确投射？

I'm trying to store the delegate in a generic collection, so I can pull it back out later to invoke it. How do I properly cast it?

推荐答案

Welp ...看起来像我，我的朋友发现了一些

Welp... looks like me and my friend found a bit of a work around.

public void Foo<T, U>(Action<T, U> myAction)
    where T : IMyInterface
    where U : IMyInterface
    {
        Action<IMyInterface, IMyInterface> anotherAction = (x, y) => eventHandler.Invoke((TSender)x, (TObject),y);
        handler.Add(someInt, anotherAction);
    }

通过简单的lambda包装，我们就能完成所需的工作。

With a simple lambda wrap, we accomplished what we needed.

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