C# 6.0 and the .NET 4.6 Framework, Seventh Edition

CHAPTER 30

Notifications, Commands, Validation, and MVVM

This chapter will conclude your investigation of the WPF programming model by introducing you to the Observable pattern and the notification system built into WPF. You’ll also expand your knowledge of commands and validation. These three items are the foundation for implementing the Model-View-ViewModel (MVVM) pattern in WPF.

The first section covers observable models and observable collections. When classes and collections implement INotifyPropertyChanged and INotifyCollectionChanged (respectively), the binding manager keeps the values in the UI in sync with the bound data. Having the data ...