private static void approach2()
{
try
{
Console.WriteLine("APPROACH 2");
Speedometer2 speedo = new Speedometer2();
speedo.CurrentSpeed = 50;
speedo.CurrentSpeed = 100;
Console.WriteLine("Current speed: " + speedo.CurrentSpeed);
Console.WriteLine("Previous speed: " + speedo.PreviousSpeed);
// Save the state of 'speedo'
SpeedometerMemento2 memento = new SpeedometerMemento2(speedo);
// Change the state of 'speed'
speedo.CurrentSpeed = 80;
Console.WriteLine("After setting to 80...");
Console.WriteLine("Current speed: " + speedo.CurrentSpeed);
Console.WriteLine("Previous speed: " + speedo.PreviousSpeed);
// Restore the state of 'speedo'
Console.WriteLine("Now restoring state...");
speedo = memento.RestoreState();
Console.WriteLine("Current speed: " + speedo.CurrentSpeed);
Console.WriteLine("Previous speed: " + speedo.PreviousSpeed);
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
Console.Write(ex.StackTrace);
}
}
public SpeedometerMemento2(Speedometer2 speedometer)
{
// Serialize...
Stream stream = File.Open("speedometer.ser", FileMode.Create);
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(stream, speedometer);
stream.Close();
}
public SpeedometerMemento2(Speedometer2 speedometer)
{
// Serialize...
Stream stream = File.Open("speedometer.ser", FileMode.Create);
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(stream, speedometer);
stream.Close();
}