Wpf event not bubbling

Question

Here is my XAML:

Answer 1

There is an override available to handle events, even though they were marked as handled. It requires that you add your handler through code as the following:

MainWindow.AddHander(UIElement.MouseUpEvent, new MouseButtonEventHandler(button1_MouseUp), true);

That last parameter specifies whether you want to accept events that were handled already or not. If you add that handler to your main window, you'll notice that the routed MouseUp events from your button are indeed bubbling up, (but their e.Handled indicates that they were already handled).

Answer 2

Microsoft wrote a very nice explanation Routed Events Overview

exactly the same thing will happen with MouseUpand PreviewMouseUp events in your case the e.Handled = (bool) chkhandle.IsChecked; stops the routing of the event.

if you want to debug the events you can use Snoop it will illustrate very nicely which events happened on which objects and who handled them.

Answer 3

1. Try handling the PreviewMouseDown event instead. You can still attach that from XAML. In your handler

2. Attach the event handler in code instead. Use the signature of AddHandler

.

private void Window_Loaded(object sender, RoutedEventArgs e)
{
        Grid1.MouseUp += new MouseButtonEventHandler(Grid1_MouseUp);
}
private void Grid1_MouseUp(object sender, MouseButtonEventArgs e)
{
        MessageBox.Show("Mouseup");
}

Answer 4

The MouseUp event is not fired on clicking the button.

Because the first fires is an event at the Button.Click, and when it works, it conflicts with the event MouseUp. Quote from here:

ButtonBase inherits from UIElement, a Button will also have access to all of the mouse button events defined for UIElement. Because the Button does something in response to button presses, it swallows the bubbling events (e.g. MouseLeftButtonDown and MouseDown). You can still detect these lower level button press events by adding handlers for the tunneling events (e.g. PreviewMouseLeftButtonDown and PreviewMouseDown).

Try to replace the Button on Label, and you'll get the desired result: