如何在WPF中聲明一個var委託類型的RoutedPropertyChangedEventHandler類型的變量？

Question

我找不到語法聲明屬性類型的委託RoutedPropertyChangedEventHandler（如滑塊ValueChange處理）

http://msdn.microsoft.com/en-us/library/ms589771.aspx

Answer 1

你想創建一個事件的我的用戶控件：

public event RoutedPropertyChangedEventHandler MyEvent; 

然而，爲了使其正常工作，你需要創建一個routed event

public static readonly RoutedEvent TapEvent = EventManager.RegisterRoutedEvent(
    "Tap", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(MyButtonSimple)); 

// Provide CLR accessors for the event 
public event RoutedEventHandler Tap 
{ 
     add { AddHandler(TapEvent, value); } 
     remove { RemoveHandler(TapEvent, value); } 
}