CODEWITHSUNDEEP
c#
Kostya Kartavenka
Kostya Kartavenka

Reputation: 45

Get return of the method from Action.Invoke

I am trying to implement small console-like commands to ASP .Net Core App. I have a class which stores names and method that should be run:

public class ActionCenter
{
    public string ActionName { get; set; }
    public Action ActionStart { get; set; }
}

And I have a list List<ActionCenter> Actions where I store all the commands and methods associated with them. To run method I can do Actions[0].ActionStart.Invoke, but I do not have return of the method. I tried Task<object> but cannot convert System.Action to System.Func<object>. Is there a way to have return from methods designed this way if not what is the right way?

Upvotes: 0

Views: 3213

Answers (1)

Christos
Christos

Reputation: 53958

As it is stated at the documentation an Action:

Encapsulates a method that has no parameters and does not return a value.

public delegate void Action()

That being said you cannot achieve that you want with an action. On the other hand, a Func<TResult>:

Encapsulates a method that has no parameters and returns a value of the type specified by the TResult parameter.

So in your case you need a Func rather than an Action. If we say that you expect your method to return always an int, you should have a Func<int> etc. Furthremore, Funcs as Actions can get a list of parameters, if your method is going to have any. So for instance, if your have a method that takes two parameters of type int and returns another int, the signarture of your Func, it would be Func<int,int,int>.

Upvotes: 1

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