在代码中获取上下文菜单的所有者

发布于 2024-08-13 19:16:33 字数 851 浏览 1 评论 0原文

我有一个像这样的 ContextMenu：

<StackPanel Orientation="Horizontal">
    <StackPanel.ContextMenu>
        <ContextMenu>
            <MenuItem Header="Delete" Click="OnDeleteClicked" />
        </ContextMenu>
    </StackPanel.ContextMenu>
</StackPanel>

我需要获取拥有该 ContextMenu 的 StackPanel 实例。我已经尝试过这个：

private void OnDeleteClicked(object sender, System.Windows.RoutedEventArgs e)
{
    FrameworkElement parent = e.OriginalSource as FrameworkElement;

    while (!(parent is StackPanel))
    {               
        parent = (FrameworkElement)LogicalTreeHelper.GetParent(parent);
    }
}

但是在获取 ContextMenu Popup 父级之后，它变为 null，与 VisualTreeHelper 相同，它在获取 StackPanel 之前变为 null >。关于如何做到这一点有什么想法吗？

谢谢！

原文

I have a ContextMenu like this:

<StackPanel Orientation="Horizontal">
    <StackPanel.ContextMenu>
        <ContextMenu>
            <MenuItem Header="Delete" Click="OnDeleteClicked" />
        </ContextMenu>
    </StackPanel.ContextMenu>
</StackPanel>

And I need to get the instance of the StackPanel that owns that ContextMenu. I already tried this:

private void OnDeleteClicked(object sender, System.Windows.RoutedEventArgs e)
{
    FrameworkElement parent = e.OriginalSource as FrameworkElement;

    while (!(parent is StackPanel))
    {               
        parent = (FrameworkElement)LogicalTreeHelper.GetParent(parent);
    }
}

But after getting the ContextMenu Popup parent, it gets null, same with the VisualTreeHelper, it gets to null before getting the StackPanel. Any idea on how to do this?

Thanks!

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晨曦慕雪 2024-08-20 19:16:33

这会给你你想要的东西

private void OnDeleteClicked(object sender, System.Windows.RoutedEventArgs e)
{
    MenuItem mnu = sender as MenuItem;
    StackPanel sp = null;
    if(mnu!=null)
    {
        sp = ((ContextMenu)mnu.Parent).PlacementTarget as StackPanel;
    }
}

希望这有帮助！

this will give you the exact thing you want

private void OnDeleteClicked(object sender, System.Windows.RoutedEventArgs e)
{
    MenuItem mnu = sender as MenuItem;
    StackPanel sp = null;
    if(mnu!=null)
    {
        sp = ((ContextMenu)mnu.Parent).PlacementTarget as StackPanel;
    }
}

Hope this helps!!

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迷迭香的记忆 2024-08-20 19:16:33

ContextMenus 和 Popups 的可视化树的工作方式略有不同。您可以使用 ContextMenu.PlacementTarget 来获取 StackPanel。 MSDN 上提供了更多信息：http://msdn.microsoft .com/en-us/library/system.windows.controls.contextmenu.placementtarget.aspx

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待天淡蓝洁白时 2024-08-20 19:16:33

上下文菜单有自己的可视化树，尝试从事件处理程序中调用它，如下所示：-

StackPanel stackPanel = GetStackPanelItemFromContextMenu((FrameworkElement)sender, yourStackPanel);

  private StackPanel GetStackPanelItemFromContextMenu(FrameworkElement sender, StackPanel stackPanel) {
     Point menuClickPoint = ((sender as FrameworkElement).Parent as ContextMenu).TranslatePoint(new Point(0, 0), stackPanel);

     // get the first potential object that was hit   
     DependencyObject obj = stackPanel.InputHitTest(menuClickPoint) as DependencyObject;

     // cycle up the tree until you hit the StackPanel
     while (obj != null && !(obj is StackPanel)) {
        obj = VisualTreeHelper.GetParent(obj);
     }

     return obj as StackPanel;
  }

the context menu has its own visual tree, try this calling this from your event handler like so :-

StackPanel stackPanel = GetStackPanelItemFromContextMenu((FrameworkElement)sender, yourStackPanel);

  private StackPanel GetStackPanelItemFromContextMenu(FrameworkElement sender, StackPanel stackPanel) {
     Point menuClickPoint = ((sender as FrameworkElement).Parent as ContextMenu).TranslatePoint(new Point(0, 0), stackPanel);

     // get the first potential object that was hit   
     DependencyObject obj = stackPanel.InputHitTest(menuClickPoint) as DependencyObject;

     // cycle up the tree until you hit the StackPanel
     while (obj != null && !(obj is StackPanel)) {
        obj = VisualTreeHelper.GetParent(obj);
     }

     return obj as StackPanel;
  }

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~没有更多了~