wpf - 获取按钮上下文菜单的所有者

Question

标题几乎说明了一切。我有很多按钮，它们都有相同的上下文菜单，我想从单击事件中确定哪个按钮被右击以到达那里。

此代码不起作用，placementTarget 为空:

private void mi_Click(object sender, RoutedEventArgs e)
{
        Button contextMenuEzen = null;

        MenuItem mnu = sender as MenuItem;

        if (mnu != null)
        {
            ContextMenu ize =(ContextMenu)mnu.Parent;
            contextMenuEzen = ize.PlacementTarget as Button;
        }
}

请帮我!

Answer 1

对我来说，这个例子有效:
XAML

<Window.Resources>
    <!-- For all MenuItems set the handler -->
    <Style TargetType="{x:Type MenuItem}">
        <EventSetter Event="Click" Handler="MenuItem_Click" />
    </Style>

    <!-- One ContextMenu for all buttons (resource) -->
    <ContextMenu x:Key="MyContextMenu">
        <MenuItem Header="Click this" />
        <MenuItem Header="Two" />
        <MenuItem Header="Three" />
    </ContextMenu>
</Window.Resources>

<Grid>
    <Button x:Name="MyButton1" Width="100" Height="30" Content="MyButton1" ContextMenu="{StaticResource MyContextMenu}" />

    <Button x:Name="MyButton2" Margin="0,110,0,0" Width="100" Height="30" Content="MyButton2" ContextMenu="{StaticResource MyContextMenu}" />
</Grid>

Code behind

private void MenuItem_Click(object sender, RoutedEventArgs e)
{
    MenuItem mnu = sender as MenuItem;
    Button MyButton = null;

    if (mnu != null)
    {
        ContextMenu MyContextMenu = (ContextMenu)mnu.Parent;
        MyButton = MyContextMenu.PlacementTarget as Button;
    }

    MessageBox.Show(MyButton.Content.ToString());
}