/// <summary>
/// Deletes the car data from isolated storage and resets the Car property.
/// </summary>
public static void DeleteCar()
{
appSettings.Remove(CAR_KEY);
appSettings.Save();
Car = null;
DeleteCarPhoto();
DeleteTempCarPhoto();
NotifyCarUpdated();
}
/// <summary>
/// Initializes the view and its data context.
/// </summary>
private void InitializePageState()
{
// Retrieve data from temporary storage if present;
// otherwise, copy data from CarDataStore.Car.
if (State.ContainsKey(CAR_INFO_KEY))
{
_car = (Car)State[CAR_INFO_KEY];
// Restore the read-only state of the odometer text box.
OdometerTextBox.IsReadOnly = (bool)State[ODOMETER_READONLY_STATE];
// Restore the change state except when the PhotoTask_Completed
// method has already set the change state.
if (!_hasUnsavedChanges) _hasUnsavedChanges =
(bool)State[HAS_UNSAVED_CHANGES_KEY];
// Delete temporary storage to avoid unnecessary storage costs.
State.Clear();
}
else
{
_car = CarDataStore.Car;
// Delete the temporary photo if it exists. This prevents an old
// temporary photo selection from reappearing after tombstoning.
CarDataStore.DeleteTempCarPhoto();
// Disable the odometer text box when displaying a saved value.
OdometerTextBox.IsReadOnly = _car.InitialOdometerReading > 0;
// Disable the delete car button for new car
if (_car.InitialOdometerReading.Equals(0))
{
var deleteButton = (ApplicationBarIconButton)this.ApplicationBar.Buttons[1];
deleteButton.IsEnabled = false;
}
}
// Set the page data context to the car.
DataContext = _car;
}
