Mouse scroll not working in a scroll viewer with a wpf datagrid and additional UI elements

Question

I am trying to figure out how to get the mouse scroll working on a wpf window with a scrollviewer and a datagrid within it. The WPF and C# code is below

Answer 1

@fjch1997, I used your solution and it works pretty well. There is only one problem which I found. It's connected with the comment of @Vadim Tofan:

For the case when the scroll viewer has as children other scrollable controls and a data grid, then that requires that the event shouldn't be marked as handled at the end of the event handler for the main scroll viewer so it could be catched also in the inner scrollable controls, however that has the side effect that when the scroll should occur only on the inner scrollable control, it will also occur on the main scroll viewer.

I also tried to remove e.Handled = true statement, but then the effect is not nice - both scrolls are moved in the same time. So, finally I enhanced a little bit event handler method to the following one:

private static void ScrollViewer_PreviewMouseWheel(object sender, System.Windows.Input.MouseWheelEventArgs e)
{
    ScrollViewer scrollViewer = (ScrollViewer)sender;
    FrameworkElement origicalControlSender = e.OriginalSource as FrameworkElement;

    ScrollViewer closestScrollViewer = origicalControlSender.GetParent();

    if (closestScrollViewer != null && !ReferenceEquals(closestScrollViewer, scrollViewer))
    {
        return;
    }

    scrollViewer.ScrollToVerticalOffset(scrollViewer.VerticalOffset - e.Delta);
    e.Handled = true;
}

public static T GetParent(this FrameworkElement control)
    where T : DependencyObject
{
    FrameworkElement parentElement = control?.Parent as FrameworkElement;

    if (parentElement == null)
    {
        return null;
    }

    T parent = parentElement as T;

    if (parent != null)
    {
        return parent;
    }

    return GetParent(parentElement);
}

This now prevents the outside scroller to scroll in case inner ScrollViewer exists.