How to pass a function func as argument to another and then assignate this argument to a delegate variable?

Question

How can I use function as parameter of another function and assign it to a delegate

public class myClass
{
    public delegate void myDelegate(double x, string s);
    //declaration of   delegate
    public void func(double x, string s)
    {
      dosomethings...
    }
    // what is the declaration of the argument 'Function declaration'
    public void myFunction('Function declaration' function)
    { 
      myDelegate deFunc;
      deFunc = function;
    }
    }
    static void Main(string[] args)
    {
        myFunction(func);
    }
}

or `myFunction(myDelegate @delegate)`. – MakePeaceGreatAgain Jun 14 '17 at 15:05 — MakePeaceGreatAgain, Jun 14 '17 at 15:05
@EdPlunkett https://dotnetfiddle.net/bNAElH – Toshi Jun 14 '17 at 15:08 — Toshi, Jun 14 '17 at 15:08
@Toshi Derp. Thanks. – 15ee8f99-57ff-4f92-890c-b56153 Jun 14 '17 at 15:18 — 15ee8f99-57ff-4f92-890c-b56153, Jun 14 '17 at 15:18

score 1 · Accepted Answer · answered Jun 14 '17 at 15:08

Main is static so another method should be static too in this case. For example:

    public delegate void myDelegate(double x, string s);
    //declaration of   delegate
    public static void func(double x, string s)
    {
        //dosomethings...
    }
    // what is the declaration of the argument 'Function declaration'
    public static void myFunction(myDelegate function)
    {
        myDelegate deFunc;
        deFunc = function;
    }

    static void Main(string[] args)
    {
        myFunction(func);
    }

MakePeaceGreatAgain · Answer 2 · 2017-06-14T15:15:18.030

1

You can either use the definition you allready provided in your class:

public void myFunction(myDelegate del)
{ ... }

or the Action-delegate introduces in .NET 3.5 which is a shortcut for a delegate returning nothing (void):

public void myFunction(Action<double, string> del)

In the latter case also deFunc within your method should be of type Action<double, string> as you can´t cast that to myDelegate.

Be aware that delegate is a reserved keyword, so you should name your parameter within the methods signature different, e.g. del or just func or @delegate with the verbatim @ in front

edited Jun 14 '17 at 15:15

answered Jun 14 '17 at 15:12

MakePeaceGreatAgain

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https://dotnetfiddle.net/bNAElH are you sure `Action` will compile? – Toshi Jun 14 '17 at 15:14

How to pass a function func as argument to another and then assignate this argument to a delegate variable?

2 Answers2