Create Event on Singleton Class

Question

I have a Windows Mobile 6.5 (.net cf 3.5) that uses a singleton class which follows this pattern:

public sealed class Singleton
{
    static readonly Singleton in         


        

Answer 1

You should just be able to do this as you would an event on any class.

public event Action<object, EventArgs> LocationChanged;

you can then have a protected virtual method such as:

protected virtual void OnLocationChanged(EventArgs args)
{
   if(LocationChanged != null)
   {
     LocationChanged(this, args);
   }
}

You can fire off your OnLocationChanged method where ever you need too and the event's you've attached will do their thing.

Answer 2

What's the problem?

public sealed class Singleton
{
  ... your code ...

  public delegate LocationChangedEventHandler(object sender, LocationChangedEventArgs ea);  

  public event LocationChangedEventHandler LocationChanged;

  private void OnLocationChanged(/* args */)
  {
    if (LocationChanged != null)
      LocationChanged(this, new LocationChangedEventArgs(/* args */);
  }
}

public class LocationChangedEventArgs : EventArgs
{
  // TODO: implement
}

Call OnLocationChanged whenever you want to fire the event.