本文介绍了WPF:当 TextBox 具有焦点时为 ListBox 设置 IsSelected,而不会丢失 LostFocus 上的选择的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个带有 ListBoxItems
和模板的 ListBox
,因此它们包含 TextBoxes
I've a ListBox
with ListBoxItems
with a template so they contain TextBoxes
当 TextBox
获得焦点时,我希望选择 ListBoxItem
.我发现的一种解决方案如下所示:
When the TextBox
gets focused I want the ListBoxItem
to be selected. One solution I've found looks like this:
<Style TargetType="{x:Type ListBoxItem}">
<Style.Triggers>
<Trigger Property="IsKeyboardFocusWithin" Value="True">
<Setter Property="IsSelected" Value="True"></Setter>
</Trigger>
</Style.Triggers>
</Style>
这很好用,但是当 TextBox
失去焦点时,选择也会失去焦点.
This works great, but when the TextBox
loses focus so does the selection.
有没有办法防止这种情况发生?
Is there a way to prevent this from happening?
推荐答案
我发现的最好的解决方案是:
Best solution I've found to do this with no code behinde is this:
<Style TargetType="{x:Type ListBoxItem}">
<Style.Triggers>
<EventTrigger RoutedEvent="PreviewGotKeyboardFocus">
<BeginStoryboard>
<Storyboard>
<BooleanAnimationUsingKeyFrames
Storyboard.TargetProperty="(ListBoxItem.IsSelected)">
<DiscreteBooleanKeyFrame KeyTime="0" Value="True"/>
</BooleanAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Style.Triggers>
</Style>
这篇关于WPF:当 TextBox 具有焦点时为 ListBox 设置 IsSelected,而不会丢失 LostFocus 上的选择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编程学习网!
本站部分内容来源互联网,如果有图片或者内容侵犯您的权益请联系我们删除!