// This will be the starting point of our event-- it will create FireEventArgs,
// and then raise the event, passing FireEventArgs.
public void ActivateFireAlarm(string room, int ferocity)
{
FireEventArgs fireArgs = new FireEventArgs(room, ferocity);
// Now, raise the event by invoking the delegate. Pass in
// the object that initated the event (this) as well as FireEventArgs.
// The call must match the signature of FireEventHandler.
// Dit kan fout gaan: FireEvent(this, fireArgs);
// veiliger: gebruik ?.
FireEvent?.Invoke(this, fireArgs);
}
// This is the function to be executed when a fire event is raised.
void ExtinguishFire(object sender, FireEventArgs fe)
{
Console.WriteLine("\nThe ExtinguishFire function was called by {0}.", sender.ToString());
// Now, act in response to the event.
if (fe.Ferocity < 2)
{
Console.WriteLine("This fire in the {0} is no problem. I'm going to pour some water on it.", fe.Room);
}
else if (fe.Ferocity < 5)
{
Console.WriteLine("I'm using FireExtinguisher to put out the fire in the {0}.", fe.Room);
}
else
{
Console.WriteLine("The fire in the {0} is out of control. I'm calling the fire department!", fe.Room);
}
}