Configuring overlay background colour for ContentDialog

Question

I\'m writing an app for the universal windows platform using the dark theme and I\'ve noticed that although I\'ve correctly set the requested theme to dark when I display a

Answer 1

Try the below code.

    /// 

    /// Set the Overlay background for content Dialog
    /// 
    /// Content Dialog reference
    public static void SetContentDialogOverlay(UIElement subTree)
    {

        var hostparent = VisualTreeHelper.GetParent(subTree);
        var rect = FindVisualChild(hostparent);
        rect.Fill = new SolidColorBrush(Colors.Black);
        rect.Opacity = 0.7;

    }

    /// 

    /// Find the child element from UIContainer
    /// 
    ///  Type
    ///  Dependency Reference 
    /// 
    public static T FindVisualChild(DependencyObject depObj) where T : DependencyObject
    {
        if (depObj != null)
        {
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
            {
                DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
                if (child != null && child is T)
                {
                    return (T)child;
                }

                T childItem = FindVisualChild(child);
                if (childItem != null) return childItem;
            }
        }
        return null;
    }

Now, Call the above method on your code behind like this----

   // Based upon your access modifier i.e. public/private or protected
    SetContentDialogOverlay(this); 

Here, "this" represent the Content Dialog reference or you can pass the object reference of the ContectDialog.

Hope, this will help you to change the color of the Overlay. Happy Coding .. :)