Delegates question - Basic

Question

Alright, I have the following code: (copied from my book).

class MyDelegate { public delegate void Func(string s); public void Show(string s) { Console.WriteLine("In MyD1: " + s); } } class Test { static void Show(string s) { Console.WriteLine("In test: " + s); } static void Main(string[] args) { MyDelegate md = new MyDelegate(); MyDelegate.Func f= new MyDelegate.Func(md.Show); MyDelegate.Func f1= new MyDelegate.Func(Show); f("hello"); f1("Hello"); f1 = f; f1("world"); } }

The output is: In MyD1: hello In TestShow Hello InMyD1: world

Now, I didn't understand why the last line of the output is in "InMyD1" . because f1 delegate is called and not f.

Thanks in advance.

Also it is usually a good habit to have your code and your output synchronized. You're saying that you have TestShow in your output, but you do not have it in your code. — Snowbear
– Snowbear, Commented Jul 19, 2011 at 14:37

SLaks · Accepted Answer · 2011-07-19 14:35:19Z

3

You wrote f1 = f.

Therefore, you are calling f.

answered Jul 19, 2011 at 14:35

SLaks

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raym0nd · Accepted Answer · 2011-07-19 14:37:29Z

0

f1 = f;

This sets f1 to f thats why you have world instead of Hello

answered Jul 19, 2011 at 14:37

raym0nd

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CassOnMars · Accepted Answer · 2011-07-19 16:34:17Z

f1 is being reassigned the function reference of f. Likewise, if you just assigned it another function in place, such as:

f1 = s => Console.WriteLine("Another function: " + s);

You'd get other output.

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