WPF中的类级事件处理程序 [英] Class-level event handler in WPF

问题描述

有人可以解释一下WPF中的类级别的事件处理程序吗？我在WPF中使用路由事件，但是目前我读了一本书，我发现作者提到了类级别的事件处理程序。

解决方案

将类处理程序视为路由事件的静态事件处理程序。你可能想要注册这样一个处理程序，如果你想要的，例如，处理所有的鼠标事件没有任何特定的对象实例涉及。你通常会在一个类的静态构造函数中注册：

  static MyWindow（）
 {
 EventManager.RegisterClassHandler（typeof（MyWindow），PreviewMouseLeftButtonDownEvent，new RoutedEventHandler（OnMouseLeftButtonDown））; 
} 
  

另见：

http://msdn.microsoft.com/en-us/library/ms597875.aspx

http：/ /karlshifflett.wordpress.com/2008/04/22/wpf-sample-series-eventmanagerregisterclasshandler/

HEllo, can someone explain me what class-level event handler is in WPF? I use routed events in WPF but currently I read a book and I found the author mentions about class-level event handler. What is the practical use of this technique?

解决方案

Think of class handlers as static event handlers for a routed event. You might want to register such a handler if you want, for example, handle all mouse down events without any particular instance of the object involved. You would typically register it in a static constructor of a class:

static MyWindow()
{
    EventManager.RegisterClassHandler(typeof(MyWindow), PreviewMouseLeftButtonDownEvent, new RoutedEventHandler(OnMouseLeftButtonDown));
}

See also:

http://msdn.microsoft.com/en-us/library/ms597875.aspx

http://karlshifflett.wordpress.com/2008/04/22/wpf-sample-series-eventmanagerregisterclasshandler/

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