[英]C# Any function as parameter
Is it possible to created a method that takes ANY method (regardless of it's parameters) as a parameter? 是否可以创建一个方法,将任何方法(不管它的参数)作为参数? The method would also have a
params
parameter which then takes all the parameters for the parameter-method. 该方法还将具有
params
参数,该参数然后获取参数方法的所有参数。
So basically what I want is something like this: 基本上我想要的是这样的:
public void CallTheMethod(Action<int> theMethod, params object[] parameters)
But then for any method, not just for methods that takes an int. 但是对于任何方法,不仅仅是采用int的方法。
Is something like this possible? 这样的事情可能吗?
Thanks 谢谢
Yes, with a delegate: 是的,有代表:
public object CallTheMethod(Delegate theMethod, params object[] parameters)
{
return theMethod.DynamicInvoke(parameters);
}
But see Marc Gravell's comment on your question :) 但请参阅Marc Gravell对您问题的评论 :)
Well, you could pass the non-specific
Delegate
, butDynamicInvoke
is sloooooowwwwww (relatively speaking)好吧,你可以通过非特定的
Delegate
,但DynamicInvoke
是sloooooowwwwww (相对来说)
It's possible, but not what should be done. 这是可能的,但不应该做什么。
This is what I would do: 这就是我要做的:
public void CallTheMethod(Action toCall)
You might go "huh". 你可能会去“嗯”。 Basically, what it lets the user do is this:
基本上,它让用户做的是:
CallTheMethod(() => SomeOtherMethod(with, some, other, parameters));
However, if you want it to return a type, it involves generics: 但是,如果您希望它返回一个类型,则涉及泛型:
public void CallTheMethod<T>(Func<T> theMethod)
You can put generic constraints on that type, do whatever you want with it, etc. 您可以在该类型上放置通用约束,随意执行任何操作,等等。
Yes. 是。 You can use DynamicInvoke to call the methods:
您可以使用DynamicInvoke来调用方法:
Action<int> method1 = i => { };
Func<bool, string> method2 = b => "Hello";
int arg1 = 3;
bool arg2 = true;
//return type is void, so result = null;
object result = method1.DynamicInvoke(arg1);
//result now becomes "Hello";
result = method2.DynamicInvoke(arg2);
A method to do this would become: 执行此操作的方法将变为:
object InvokeMyMethod(Delegate method, params object[] args)
{
return method.DynamicInvoke(args);
}
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