public static void Run()
{
WeatherDataWithEvent data = new WeatherDataWithEvent(13);
CurrentConditionDisplayWithEvent display1 = new CurrentConditionDisplayWithEvent("Display1", data);
// OUTPUT --> Display1 - Temperature: 13
CurrentConditionDisplayWithEvent display2 = new CurrentConditionDisplayWithEvent("Display2", data);
// OUTPUT --> Display2 - Temperature: 13
// update the temperature.
data.Temperature = 14;
// Display 1 and 2 show the new temperature
// OUTPUT:
/* Weather data is updated
* Display1 - Temperature: 14
* Weather data is updated
* Display2 - Temperature: 14
*/
data.OnTemperatureChanged -= display2.OnTemperatureChanged;
data.Temperature = 15;
// Only Display 1 shows the new temperature
// OUTPUT:
/* Weather data is updated
* Display1 - Temperature: 15
*/
Console.ReadLine();
}
public CurrentConditionDisplayWithEvent(string name, WeatherDataWithEvent data)
{
this.name = name;
this.data = data;
this.data.OnTemperatureChanged += this.OnTemperatureChanged;
Display();
}
public void OnTemperatureChanged(WeatherDataWithEvent data)
{
Console.WriteLine("Weather data is updated");
this.data = data;
Display();
}
