问题描述
我正在为Windows 10移动设备开发应用程序，并且正在努力处理ComboBox控件的样式，更具体地说，是所选项目的背景色.
I'm developing an application for a Windows 10 Mobile device and I'm struggling to handle the styling for the ComboBox control, more specifically, the selected item's background color.
在选择任何项目之前如何显示组合框:
展开的组合框
以"2"作为所选项目的组合框
我似乎找不到控件的任何属性，例如SelectedItemBackgroundColor，并且更改前景"和背景"属性不会影响该问题.
I can't seem to find any properties for the control such as SelectedItemBackgroundColor and changing the Foreground and Background properties doesn't affect the problem.
推荐答案
如果您查看文档，您会看到 ComboBoxItem 的默认样式使用 SystemControlHighlightListAccentLowBrush 画笔作为 SelectedItem .您可以在应用程序中重新定义该资源，也可以复制默认的 Style 并在 Selected VisualState Background 画笔>使用自定义画笔.
If you look into the documentation, you can see the default style of ComboBoxItem uses the SystemControlHighlightListAccentLowBrush brush as the background of SelectedItem. You can redefine this resource in your app or you can copy the default Style and replace the Background brush in Selected VisualState with a custom brush.
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