Handling RadDropDownButton's DropDownOpening event causes the application to hang.

[Ivan Zlatanov]

<telerik:RadDropDownButton

    VerticalAlignment="Center"

    HorizontalAlignment="Center"

    DropDownOpening="RadDropDownButton_DropDownOpening"

    Content="...">

    <telerik:RadDropDownButton.DropDownContent>

        <TextBlock Text="Sample content" />

    </telerik:RadDropDownButton.DropDownContent>

</telerik:RadDropDownButton>



private void RadDropDownButton_DropDownOpening( object sender, RoutedEventArgs e )
{
    e.Handled = true;
}

[Milena]

Hi Ivan,

Thank you for reporting this issue. I was able to reproduce the described behavior on our side and we can confirm this is a bug. Therefore I logged it in our Feedback portal where you can track its progress. I have also updated your Telerik points as a small appreciation for your cooperation.

In the meantime, as a workaround you can use PreviewMouseLeftButtonDown event of the DropDownButton instead of DropDownOpening  event.

Please excuse us for any inconvenience caused.

Regards,
Milena
Telerik