触发的SelectedIndex改变，同时单击任意控制ListBoxItem的区域内 [英] Trigger SelectedIndex changed whilst clicking on any control within a ListBoxItem area

问题描述

我已经为ListBoxItem的数据模板，其中包含的几个按钮，而像网格或图表一些自定义的控件。每个按钮绑定到相应的命令处理程序，ListView控件的SelectedIndex属性必将视图模型的属性格式为好。

I've a data template for ListBoxItem which contains of few buttons, and few custom controls like Grid or Chart. Each button is bound to an appropriate command handler, SelectedIndex property of a ListView control is bound to ViewModel's propery as well.

问题：我无法解析当前选择的项目/指标，因为它并没有改变，而点击一个按钮或其他控制一个ListBox中的命令处理程序（这是必然的按钮）项目，但是当我点击一个ListBoxItem地区本身 - 的SelectedIndex改变

The problem: in command handlers (which are bound to buttons) I can't resolve currently selected item/index because it is not changing whilst clicking on a button or an other control within a ListBox item, but when I clicking on ListBoxItem area itself - SelectedIndex is changing.

的问题是如何触发的SelectedIndex被同时点击任何控制范围内的ListBoxItem的变化？

Question is how to trigger SelectedIndex to be changed whilst clicking on any control within ListBoxItem?

推荐答案

添加到您的 ListBox.Resources

<ListBox.Resources>
    <Style TargetType="{x:Type ListBoxItem}">
        <Style.Triggers>
            <Trigger Property="IsKeyboardFocusWithin" Value="True">
                <Setter Property="IsSelected" Value="True" />
            </Trigger>
        </Style.Triggers>
    </Style>
</ListBox.Resources>

修改

在previous方法不仅使选择，只要它具有键盘焦点的ListBoxItem中。如果将集中出ListBoxItem中，就再次成为未选中。

The previous method only makes the ListBoxItem selected for as long as it has keyboard focus. If you move focus out of the ListBoxItem, it becomes unselected again.

下面是另外一个简单的方法来选择ListBox中的项目时，它保持选定的键盘焦点的项目内移动，而当焦点移出ListBoxItem中的

Here's another simple way to select a ListBox item when the keyboard focus moves within the item, and it stays selected when focus is moved out of the ListBoxItem

<Style TargetType="{x:Type ListBoxItem}">
    <EventSetter Event="PreviewGotKeyboardFocus" Handler="SelectCurrentItem"/>
</Style>

而在code

And in the Code Behind

protected void SelectCurrentItem(object sender, KeyboardFocusChangedEventArgs e)
{
    ListBoxItem item = (ListBoxItem)sender;
    item.IsSelected = true;
}

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