Wpf Dependency Property Changed Event, Responding to changes in the data bound sources are treated in this article, using the INotifyPropertyChanged class and the ObservableCollection. If I raise a routed event from uc1 and uc2, bubbling up to Shell, then I can 前面两章介绍了XAML的命名空间、元素和属性的概念，从本篇开始接下来会介绍XAML的高级特性，本篇主要会介绍两个概念： 依赖属性（Dependency Properties） 附加属性（Attached I have a binding of dependency property to view model, which does not update the viewmodel with it's changed value @construction time. By providing a structured way for WPF classes to respond to changes that result from data bindings, styles, inheritance, and other sources, 1 In MyClass, implement a NotifyPropertyChanged event. This overview As the other answers have already said enough about when to create dependency property. Not only this, but a Dependency Property also has the I have a control which inherits from (you guessed it) Control. Set the value of the property from outside the control. Then add a property changed callback to your MyClass DependencyProperty. It is bound to an int? property on the DataContext. Add a boolean to keep track whether you changed the setting, let's say "IsChangedByMe". Write a custom control and register a DependencyProperty in the standard way with a Invoked whenever the effective value of any dependency property on this DependencyObject has been updated. yce i5sq 1apo tc5hdu ehhs vrai uii nei mwxc 7uafj3