wpf 如何在 XAML 中使用带有 MouseUp 和 MouseDown 事件的按钮上的交互触发器？
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How to use Interaction Trigger on button with MouseUp and MouseDown events in XAML?
提问by AXG1010
I have a button that needs to execute two separate commands (one to start something and one to stop it). After doing some research the System.Windows.Interactivity.dll seemed to provide an easy way to accomplish this. But it doesn't work with the left mouse button (it does work if I use an event like MouseDoubleClickor MouseRightButtonDown, but not MouseDown, MouseUp, or MouseRightButtonDown)...it seems as if the button consumes the event itself and the interaction.trigger never sees it. I provided a snippet of my XAML below, what can I do to get around this behavior?
我有一个按钮需要执行两个单独的命令（一个启动某事，一个停止它）。在做了一些研究之后，System.Windows.Interactivity.dll 似乎提供了一种简单的方法来实现这一点。但它不适用于鼠标左键（如果我使用像MouseDoubleClick或MouseRightButtonDown这样的事件，它确实有效，但不使用MouseDown、MouseUp或MouseRightButtonDown）......似乎按钮消耗了事件本身和交互.trigger 永远不会看到它。我在下面提供了我的 XAML 片段，我可以做些什么来解决这种行为？
<Button Content="DoStuff">
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseDown">
<i:InvokeCommandAction Command="{Binding StartCommand}" />
</i:EventTrigger>
<i:EventTrigger EventName="MouseUp">
<i:InvokeCommandAction Command="{Binding StopCommand}" />
</i:EventTrigger>
</i:Interaction.Triggers>
</Button>
回答by Omri Btian
You can use PreviewMouseDownand PreviewMouseUpinstead
您可以使用PreviewMouseDownandPreviewMouseUp代替
回答by eran otzap
mouseleftbuttondown , mouseleftbuttonup
mouseleftbuttondown , mouseleftbuttonup
