CODEWITHSUNDEEP
c#delegates
Gabriel Graves
Gabriel Graves

Reputation: 1785

Best way to pass delegate parameters

What is the best way to pass parameters through to a delegate? I can see benefits for both of the following ways so I would like to know the most used and industry accepted way of doing it:


1) Pass any parameters individually with each parameters being just that, a parameter.

Example Delegate

public delegate void MyDelegate(bool PARAM1, String PARAM2, int PARAM3);



2) Pass any parameters through a struct and the only parameter of the delegate is that struct.

Example Struct

public struct MyDelegateArgs
{
    public bool PARAM1;
    public String PARAM2;
    public int PARAM3;
}

Example Delegate

public delegate void MyDelegate(MyDelegateArgs args);

Upvotes: 1

Views: 148

Answers (2)

Tetsujin no Oni
Tetsujin no Oni

Reputation: 7375

If your delegate has utility as an Action<T> or a Predicate<T>, using the struct argument is preferable as it will keep you from tripping over a case where the signature gets too large for the predefined Action or Predicate definitions when you go to extend the delegate's signature.

Upvotes: 1

BrokenGlass
BrokenGlass

Reputation: 160952

Imagine your struct had 20 properties / fields - would you really want to pass all of those in as parameters? Generally I would argue to hide all of this complexity and keep your code DRY by passing in a class / struct instead - this in most cases is also more expressive - your delegates needs a parameter of type MyDelegateArgs.

The only argument I could come up with for passing in individual values is if you only need a small subset that just happen to be used in MyDelegateArgs but are otherwise unrelated.

Upvotes: 2

Related Questions