i：EventTrigger EventName - 其中一些有效，有些则无效。为什么？ [英] i:EventTrigger EventName - some of them work, others not. Why?

问题描述

我使用MS Blend InteractionTrigger构建一个控件。一些像MouseOver或MouseLeave这样的EventNames非常适合。当我更改EventName（MouseDown，MouseLeftButtonDown） 触发器不再起作用。为什么不呢？

i build a control with a MS Blend InteractionTrigger. Some of the EventNames like MouseOver or MouseLeave work perfect. When i change the EventName (MouseDown, MouseLeftButtonDown)  the Trigger doesn't work any more. Why not?

工作：

< i：EventTrigger EventName =" MouseEnter" SOURCENAME = QUOT;&的StackPanel QUOT; >

   &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP;  < ei：ChangePropertyAction PropertyName =" Background"值="红色"/>

   &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP;  < / i：EventTrigger>

<i:EventTrigger EventName="MouseEnter" SourceName="stackPanel" >
                    <ei:ChangePropertyAction PropertyName="Background" Value="red"/>
                </i:EventTrigger>

不起作用：

< i：EventTrigger EventName =" MouseLeftButtonDown" SOURCENAME = QUOT;&的StackPanel QUOT; >

   &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP;  < ei：ChangePropertyAction PropertyName =" Background"值="红色"/>

   &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP;  < / i：EventTrigger>

<i:EventTrigger EventName="MouseLeftButtonDown" SourceName="stackPanel" >
                    <ei:ChangePropertyAction PropertyName="Background" Value="red"/>
                </i:EventTrigger>

任何想法？

推荐答案

通常在这种情况下，它意味着控件本身正在处理事件而不是传递它。例如，Button控件不会传递MouseLeftButtonDown，而是公开Click事件。

Usually in this case it means that the control itself is handling the event and not passing it on. For example, a Button control will not pass along MouseLeftButtonDown, but instead exposes the Click event.

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