Get owner of context menu on Button - wpf

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.

Answer 3

use the ContextMenuService to get the placement target as in the following example:
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
Loaded += (sender, args) => {
RoutedEventHandler clickHandler = delegate(object o, RoutedEventArgs eventArgs) {
var mi = (MenuItem) o;
var contextMenu = (ContextMenu) mi.Parent;
var pTarget = ContextMenuService.GetPlacementTarget(contextMenu) as Button;
// just to make sure
if (pTarget == null) {
return;
}
string message = "You clicked on the button " + pTarget.Content;
MessageBox.Show(message);
};
// create a single instance of the ContextMenu
var cm = new ContextMenu();
for (int i = 0; i < 10; i++) {
var mi = new MenuItem {Header = "Item " + i};
mi.Click += clickHandler;
cm.Items.Add(mi);
}
// create a set of buttons and assign them to the RootVisual(StackPanel)
for (int i = 0; i < 5; i++) {
var button = new Button {Content = "Button " + i, ContextMenu = cm};
this.RootVisual.Children.Add(button);
}
};
}
}