如何在WPF中向可编辑的ComboBox添加焦点样式 [英] How to add a focus style to an editable ComboBox in WPF

问题描述

我一直在查看以下示例如何设置 ComboBox 的样式，但是在进入可编辑组合框时，我无法创建焦点效果。每当 ComboBox 接收焦点时，它应该进入编辑模式，组件应该有一个焦点样式。

I've been looking at the following example on how to style the ComboBox, but I haven't been able to create a focus effect when going into an editable combo box. Whenever the ComboBox receives focus, it should go into edit mode and the component should have a focus style.

基本问题是，每当我进入编辑模式时，它不是周围的 ComboBox 焦点，但文本子组件和我一直无法创建触发器在文本组件修改 ComboBox

The basic problem is that whenever I go into the edit mode, it's not the surrounding ComboBox which actually has the focus, but the text subcomponent and I haven't been able to create a Trigger on the text component which modifies the ComboBox's border style since I don't know how to refer to the parent component from the trigger.

我试过添加 ControlTemplate

I've tried adding ControlTemplate Trigger on the TextBox, or style trigger. I've tried to refer to the ComboBox by name or by using the TemplateBinding option, but without any luck. A simple example would be very appreciated.

推荐答案

将IsKeyboardFocusWithin绑定到IsDropDownOpen

Bind IsKeyboardFocusWithin to IsDropDownOpen

<ComboBox ItemsSource="{Binding SortedItems}" StaysOpenOnEdit="True"
              IsDropDownOpen="{Binding IsKeyboardFocusWithin, 
                  RelativeSource={RelativeSource Self}, 
                  Mode=OneWay}">
</ComboBox>

这篇关于如何在WPF中向可编辑的ComboBox添加焦点样式的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！