MouseUp event doesnt work on left click

Question

I am making a GUI using Windows Presentation Foundation (WPF). When I mouse click a button (left or right), I want a message box shown. So far I have managed to make an example from tutorials, but it only works when I right-click, and not when I left-click the button. I cannot see anything in my code, which should prevent left-click from working, so I hope you can help me.

XAML code

<Grid>
    <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="72">
        Hello, WPF!
    </TextBlock>

    <!-- This button shuld activate the even MyButton_MouseUp -->
    <Button Margin="200,250,200,20" Name="MyButton"  MouseUp="MyButton_MouseUp">
        Test
    </Button>
</Grid>

C# code

// This only works on right-click
private void MyButton_MouseUp(object sender, MouseButtonEventArgs e)
{
    MessageBox.Show("Hello world!");
}

Salah Akbari · Accepted Answer · 2017-02-04T10:52:02.663

3

You can subscribe to the PreviewMouseUp's Tunneled event instead of MouseUp:

<Button Margin="200,250,200,20" Name="MyButton"  PreviewMouseUp="MyButton_MouseUp" />

The PreviewMouseUp's Routing strategy is Tunneling, i.e it will go down of the VisualTree hierarchy, and so the Tunnel events are triggered before the Bubble events.

edited Feb 04 '17 at 10:52

answered Feb 04 '17 at 10:37

Salah Akbari

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Thanks, that did the trick. Any chance you can also explain why? :-) – Jakob Busk Sørensen Feb 04 '17 at 10:42
1

@Noceo See my updated answer and also have a look at the MSDN links that I included. – Salah Akbari Feb 04 '17 at 10:43
Cool. I still don't get why it worked on right click though, but at least now I know that there are different event types. Thanks once again. – Jakob Busk Sørensen Feb 04 '17 at 10:55

score 1 · Answer 2 · edited May 23 '17 at 11:45

1

In addition to S. Akbari's post, this one is worth reading in order to understand why right-click works, and left-click does not...

How to use mouseDown and mouseUp on <button/>

edited May 23 '17 at 11:45

Community

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answered Feb 04 '17 at 11:29

Jakob Busk Sørensen

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MouseUp event doesnt work on left click

2 Answers2