wpf textblock专注于鼠标右键单击

Question

你好，我是wpf c＃的新手，我有一个运行时填充的treeview，这是我的xaml代码

<StackPanel Orientation="Horizontal">
    <Image Source="Properties\accessories-text-editor-6.ico" Margin="0,0,5,0" />
    <TextBlock Text="{Binding Name}" Foreground="Green" MouseLeftButtonDown="TextBlock_MouseLeftButtonDown" MouseRightButtonDown="TextBlock_MouseRightButtonDown" >
        <TextBlock.ContextMenu>
            <ContextMenu>
                <MenuItem Header="HeadLine" ></MenuItem>
                <MenuItem Header="Textblock" ></MenuItem>
                <MenuItem Header="Author" ></MenuItem>
                <MenuItem Header="PageNumber" ></MenuItem>
                <MenuItem Header="RunningTitle" ></MenuItem>
                <MenuItem Header="Illustration" ></MenuItem>
            </ContextMenu>
        </TextBlock.ContextMenu>
    </TextBlock>
</StackPanel>

我想要的是当我右键单击树视图中的文本块时。 文本块需要重点关注。 到目前为止，它所做的是显示上下文菜单项。

那么如何获取右键单击文本块的索引？ 所以我可以专注于那个项目。 谢谢

Answer 1

无法锁定TextBlock ...但是您可以通过转换sender参数在MouseRightButtonDown事件处理程序中获取对它的引用：

private void TextBlock_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
    TextBlock txt = sender as TextBlock;
    //do whatever you want with the TextBlock...
}

如果您处于TreeView的上下文中，则可能要选择父级TreeViewItem：

private void TextBlock_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
    TextBlock txt = sender as TextBlock;
    TreeViewItem tvi = FindParent<TreeViewItem>(txt);
    if (tvi != null)
        tvi.IsSelected = true;
}

private static T FindParent<T>(DependencyObject dependencyObject) where T : DependencyObject
{
    var parent = VisualTreeHelper.GetParent(dependencyObject);

    if (parent == null) return null;

    var parentT = parent as T;
    return parentT ?? FindParent<T>(parent);
}