Question

Consider the following XAML:

<Window x:Class="ContextMenuEvent.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525" ContextMenuOpening="Window_ContextMenuOpening">
    <Grid>
        <Button>Ok</Button>
    </Grid>
</Window>

Right-clicking the button causes ContextMenuOpening to fire, even though no context menu actually appearing.

Why is it happening? What can I do to get an even only when a context menu is REALLY opening?

I am aware I can use ContextMenu.Opened event, but this will only cover a single context menu, and I want to cover all the (existing) context menus in the form.

Answer 1

Not so sure why you’d use this approach. You can however easily check if a context menu would appear. Like this:

    private void Window_ContextMenuOpening(object sender, ContextMenuEventArgs e) {
        var menu = (e.Source as FrameworkElement).ContextMenu;
        if (menu != null) {
            // etc..
        }
    }