将Action <T>存储在单个集合中以供以后使用

Question

我试图在内存中保存一个类型的引用集合,Action<T>其中T是变量类型

我找到了解决方案,dynamic但我不想使用动态解决方案

public class MessageSubscriptor:IMessageSubscriptorPool
{
    Dictionary<Type, Action<dynamic>> Callbacks = new Dictionary<Type, Action<dynamic>>();
    public void Subscribe<T>(Action<T> callback) where T :IMessage
    {
        Callbacks.Add(typeof(T), (obj) => callback(obj));
    }
}

有谁知道更好的处理方法？提前致谢.

Answer 1

Action<T>是一个Delegate,所以...

public class MessageSubscriptor:IMessageSubscriptorPool
{
    private readonly Dictionary<Type, Delegate> _callbacks = new Dictionary<Type, Delegate>();

    public void Subscribe<T>(Action<T> callback) where T :IMessage
    {
        _callbacks.Add(typeof(T), callback);
    }
}

然后,假设你要调用一个,你可以简单地执行一个演员:

public void Invoke<T>(T message) where T :IMessage
{
    Delegate callback;
    if (_callbacks.TryGetValue(typeof(T), out callback))
        ((Action<T>)callback).Invoke(message);
}