Windows 10 Development with XAML and C# 7 by Jesse Liberty Jon Galloway Philip Japikse & Jonathan Hartwell

Author:Jesse Liberty, Jon Galloway, Philip Japikse & Jonathan Hartwell
Language: eng
Format: epub
Publisher: Apress, Berkeley, CA

Data binding

Animation and storyboards

Templates and styles

Inheritance

A key value of the dependency properties system is the ability to build properties that automatically notify any interested party that is registered each time the value of the property changes. This free, painless, and automatic implementation of the observer pattern1 is tremendously powerful and greatly reduces the burden on the client programmer (in fact, the data-binding system depends on it!).

You normally will not have to create dependency properties unless you are creating a custom control (a topic beyond the scope of this book).

The first thing to know is that in order to support a dependency property, the object that defines the property (your custom control) must inherit from the DependencyObject. Virtually all of the types you use for a Windows Store app with XAML and C# will be a DependencyObject subclass.

You might then declare your property like this:

public bool Valuable

{

get { return (bool) GetValue( ValuableProperty ); }

set { SetValue( ValuableProperty, value ); }

}

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