提高WPF MouseLeftButtonDownEvent事件 [英] Raising WPF MouseLeftButtonDownEvent event

问题描述

 我正在尝试通过使用以下代码将VisualBasic 
冒出来升级MouseLeftButtonDownEvent。 MouseButtonEventArgs args = new MouseButtonEventArgs（Mouse.PrimaryDevice，0，MouseButton.Left）; 
 args.RoutedEvent = UIElement.MouseLeftButtonDownEvent; 
 args.Source = this; 
 RaiseEvent（args）; 
  

由于某些原因，较高级别的组件未收到此冒泡事件。
我是忽略某些东西，还是无法提起这个鼠标事件

解决方案

你的问题是你正在提高一个事件不起泡。

MouseLeftButtonDownEvent 被定义为 RoutingStrategy.Direct ，这意味着它被路由到只接收事件的控件。

你想使用 Mouse.MouseDownEvent 事件。 UIElement 和其他类内部转换为一个 MouseLeftButtonDownEvent 。确保将e.ChangedButton设置为 MouseButton.Left ：

  RaiseEvent （new MouseButtonEventArgs（Mouse.PrimaryDevice，0，MouseButton.Left）
 {
 RoutedEvent = Mouse.MouseDownEvent，
 Source = this，
}）; 
  

I am trying ot raise a MouseLeftButtonDownEvent by bubbling it up the Visual tree with the following code.

         MouseButtonEventArgs args = new MouseButtonEventArgs(Mouse.PrimaryDevice,0,     MouseButton.Left);            
        args.RoutedEvent = UIElement.MouseLeftButtonDownEvent;
        args.Source = this;
        RaiseEvent(args);

For some reason the higher level components are not receiving this bubbled event. Am I overlooking something or is it not possible to raise this Mouse event

解决方案

Your problem is that you are raising an event that does not bubble.

MouseLeftButtonDownEvent is defined as RoutingStrategy.Direct, which means it is routed to only the control receiving the event.

You want to use Mouse.MouseDownEvent event instead. UIElement and other classes internally convert this into a MouseLeftButtonDownEvent. Make sure you set e.ChangedButton to MouseButton.Left:

RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
  RoutedEvent = Mouse.MouseDownEvent,
  Source = this,
});

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