WPF ComboBox弹出窗口放置：底部并且对齐到右边缘 [英] WPF ComboBox popup placement : Bottom and aligned to the right edge

问题描述

我尝试使用非标准下拉列表创建 ComboBox 。基本上，我希望下拉菜单低于 ComboBox ，但是与 ComboBox 的右边缘对齐，而不是

一个正常的 ComboBox 看起来像：

我想要的：

我试图在我的 ComboBox 模板中使用 Popup.PlacementMode code>，但没有一个可能的值似乎做我想要的。有没有简单的方法，最好是纯XAML？

解决方案

当我打开Expression Blend时，几秒钟内的解决方案：

 < Popup Placement =LeftVerticalOffset ={TemplateBinding ActualHeight}
 Horizo​​ntalOffset ={TemplateBinding ActualWidth}
  

有时这个应用程序比用手写xaml更有用，但不是那么频繁。
>

I'm trying to create a ComboBox with a non-standard dropdown alignment. Basically, I want the dropdown to be below the ComboBox, but aligned with the right edge of the ComboBox instead of the left edge.

What a normal ComboBox looks like:

What I want:

I tried to play with the Popup.PlacementMode property in the template of my ComboBox, but none of the possible values seem to do what I want. Is there a simple way to do it, preferably in pure XAML?

解决方案

When I opened Expression Blend, I have come up with the solution within a few seconds:

<Popup Placement="Left" VerticalOffset="{TemplateBinding ActualHeight}" 
       HorizontalOffset="{TemplateBinding ActualWidth}"

Sometimes this application is more useful than writing xaml by hands, but not so often.

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