Model-View-ViewModel (MVVM)

MVVM is a popular software architecture pattern commonly used with WPF applications

• Model-View-ViewModel pattern
  • 2 way binding
    • The View DataContext property should be assigned an implementation of the View Model
    • “{Binding …}” XAML element links a View property to a View Model property
  • Change notification
    • View Model should implement the INotifyPropertyChanged interface
      • PropertyChanged event should be raised whenever a property value changes
  • Commands
    • View Model must provide an implementation of the ICommand interface per command
• Helper classes provided by the Display API to implement the above
  • BindableBase base class
    • Implements INotifyPropertyChanged
    • Provides SetProperty methods to simplify following the pattern
  • DisposableBindableBase base class
    • As per BindableBase but also supports IDisposable
  • DelegateCommand class
    • Provides a generic implementation of ICommand for commands