// The method to handle temperature change events.
public void TemperatureChange(Object sender,
TemperatureChangedEventArgs temp)
{
Console.WriteLine("ChangeObserver: Old={0}, New={1}, Change={2}",
temp.OldTemperature, temp.NewTemperature,
temp.NewTemperature - temp.OldTemperature);
}
// The method to handle temperature change events.
public void TemperatureChange(Object sender,
TemperatureChangedEventArgs temp)
{
count++;
sum += temp.NewTemperature;
Console.WriteLine
("AverageObserver: Average={0:F}", (double)sum / (double)count);
}
// A protected method used to raise the TemperatureChanged event.
// Because events can be triggered only from within the containing
// type, using a protected method to raise the event allows derived
// classes to provide customized behavior and still be able to raise
// the base class event.
virtual protected void OnTemperatureChanged
(TemperatureChangedEventArgs args)
{
// Notify all observers. A test for null indicates whether any
// observers are registered.
if (TemperatureChanged != null)
{
TemperatureChanged(this, args);
}
}