WPF：在ComboBoxItem的MouseOver上弹出PopUp [英] WPF: PopUp on MouseOver of a ComboBoxItem

问题描述

有没有人知道如何在ComboBoxItem的MouseOver上显示PopUp的示例？ TIA

Does anyone know of an example of how to display a PopUp on MouseOver of a ComboBoxItem? TIA

编辑：我知道如何创建，样式和定位PopUp，但不知道如何显示它！我可能会退休。

I know how to create, style and position the PopUp but not how to display it! I may be retired.

推荐答案

在我们开始之前，您可以使用工具提示吗？

Before we start, could you just use a tooltip?

否则，设置ComboBoxItem的控件telmplate，将你的弹出窗口放在你想要的位置，但将Isopen属性设置为false。

otherwise, style the ComboBoxItem's control telmplate, include your popup in the style positioned where you want but set the Isopen property to false.

鼠标悬停，将弹出式窗口的IsOpen属性设置为true。

Use a trigger on mouse over to set your popup's IsOpen property to true.

这里是使用触发器OnMouseOver

here is an example of using a trigger OnMouseOver

的示例，在你的风格像这样： -

you will end up with a trigger in your style like this :-

  <Style.Triggers>
    <Trigger Property="IsMouseOver" Value="True">
      <Setter TargetName="thePopupsName"
              Property="IsOpen"
              Value="True" />
    </Trigger>
  </Style.Triggers>

当mouseOver发生时，弹出窗口会弹出，当弹出的弹出窗口将返回其默认值。

when the mouseOver occurs the popup will popup, when its gone the popup will return to its default value.

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