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

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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