WPF:当文本框具有焦点时,为列表框设置IsSelected,而不会丢失对LostFocus的选择 [英] WPF: Setting IsSelected for ListBox when TextBox has focus, without losing selection on LostFocus
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问题描述
我的模板中有ListBox
和ListBoxItems
,因此它们包含TextBoxes
I've a ListBox
with ListBoxItems
with a template so they contain TextBoxes
当TextBox
聚焦时,我希望选择ListBoxItem
.我找到的一种解决方案是这样的:
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,选择也是如此.
This works great, but when the TextBox
loses focus so does the selection.
有办法防止这种情况发生吗?
Is there a way to prevent this from happening?
推荐答案
我发现最好的解决方案是没有代码的:
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>
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