Events - naming convention and style

Question

I\'m learning about Events / Delegates in C#. Could I ask your opinion on the naming/coding style I\'ve chosen (taken from the Head First C# book)?

Am teaching a fr

Answer 1

In your case it could be:

class Metronome {
  event Action Ticked;

  internalMethod() {
    // bla bla
    Ticked();
  }
}

---

Above sampple use below convention, self-describing ;]

Events source:

class Door {

  // case1: property change, pattern: xxxChanged
  public event Action LockStateChanged;

  // case2: pure action, pattern: "past verb"
  public event Action Opened;

  internalMethodGeneratingEvents() {
    // bla bla ...

    Opened(true);
    LockStateChanged(false);
  }

}

BTW. keyword event is optional but enables distinguishing 'events' from 'callbacks'

Events listener:

class AlarmManager {

  // pattern: NotifyXxx
  public NotifyLockStateChanged(bool state) {
    // ...
  }

  // pattern: [as above]      
  public NotifyOpened(bool opened) {
  // OR
  public NotifyDoorOpened(bool opened) {
    // ...
  }

}

And binding [code looks human friendly]

door.LockStateChanged += alarmManager.NotifyLockStateChanged;
door.Moved += alarmManager.NotifyDoorOpened;

Even manually sending events is "human readable".

alarmManager.NotifyDoorOpened(true);

Sometimes more expressive can be "verb + ing"

dataGenerator.DataWaiting += dataGenerator.NotifyDataWaiting;

Whichever convention you choose, be consistent with it.