WPF 在单击鼠标时展开 TreeView [英] WPF expand TreeView on single mouse click

问题描述

我有一个带有 HierarchicalDataTemplate 的 WPF TreeView.

I have a WPF TreeView with a HierarchicalDataTemplate.

目前我必须双击一个项目才能展开/折叠它.

Currently I have to double click an item to expand/collapse it.

我想将此行为更改为单击一次，而不会丢失其他功能.所以它应该在点击时展开和折叠.

I would like to change this behaviour to a single click, without loosing other functionality. So it should expand and collapse on click.

推荐的方法是什么?

谢谢！

推荐答案

您可以使用重新模板化的复选框作为您的节点(包含您当前使用的任何模板)，并将其 IsChecked 属性绑定到 TreeViewItem 的 IsExpanded 属性.

You could use a re-templated checkbox as your node (containing whatever template you are currently using) with its IsChecked property bound to the IsExpanded property of the TreeViewItem.

这是我刚刚测试过的一个模板，它似乎可以完成这项工作:

Here is a template I've just test that seems to do the job:

<HierarchicalDataTemplate ItemsSource="{Binding Items}">
    <CheckBox IsChecked="{Binding RelativeSource={RelativeSource AncestorType=TreeViewItem}, Path=IsExpanded}">
        <CheckBox.Template>
            <ControlTemplate>
                <TextBlock Text="{Binding Header}"></TextBlock>
            </ControlTemplate>
        </CheckBox.Template>
    </CheckBox>
</HierarchicalDataTemplate>

只需用您需要的任何内容替换 ControlTemplate 内容即可.

Just replace the ControlTemplate contents with whatever you need.

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