C＃DynamicObject类方法

Question

Is there an easy way to create a class method for a subclass of a DyanamicObject or ExpandoObject?

Is resorting back to reflection the only way?

What I mean is something like :-

class Animal : DynamicObject {
}

class Bird : Animal {
}

class Dog : Animal {
}

Bird.Fly = new Action (()=>Console.Write("Yes I can"));

Bird.Fly in this case applying to the class of Bird rather than any specific instance.

Answer 1

Nope, there are no dynamic class scoped methods. The closest thing you could do is have a dynamic singleton statically declared on the subclass.

class Bird : Animal {
    public static readonly dynamic Shared = new ExpandoObject();


}

Bird.Shared.Fly = new Action (()=>Console.Write("Yes I can"));

Answer 2

 public class Animal : DynamicObject
    {
        Dictionary<string, object> dictionary = new Dictionary<string, object>();

        public override bool TryGetMember(
        GetMemberBinder binder, out object result)
        {
            string name = binder.Name.ToLower();
            return dictionary.TryGetValue(name, out result);
        }

        public override bool TrySetMember(SetMemberBinder binder, object value)
        {
            dictionary[binder.Name.ToLower()] = value;
            return true;
        }
    }
    public class Bird : Animal
    {

    }

And then call it as your example:

dynamic obj = new Bird();
            obj.Fly = new Action(() => Console.Write("Yes I can"));

            obj.Fly();

For more info check DynamicObject