Get owner of context menu on Button

Question

Title just about says it all.I have a lot of buttons, all of them have the same context menu, I want to determine from the click event which button was rgiht clicked to get there.

This code does not work, placementTarget is null:

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;
        }
}

Please help me!

Answer 1

For me, this example works:

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());
}

Answer 2

RoutedEvents don't work exactly like regular events - the signature of the handler is EventHandler(object sender, RoutedEventArgs e). The RoutedEventArgs has a property called OriginalSource that represents the element in your UI that was actually clicked. In contrast, the sender parameter will always be the object on which the event handler is registered.