Question

I have some code which used to work and now doesn’t (don’t know if it’s SL4 -> SL5 or some other update that caused this).

I’m creating MenuItems on the fly for a right-click menu and I’m assigning the icon like so:

public static class XamlUtility
   {
        public static string makeResourcePngUri(string sName)
        {
            return "/MyApplication;component/Resources/" + sName + ".png";
        }

        public static BitmapImage getBitmapImageFromResources(string sName)
        {
            BitmapImage _bmi = null;
            _bmi = new BitmapImage(new Uri(makeResourcePngUri(sName), UriKind.Relative));

            return _bmi;
        }

        public static Image getImageFromResources(string sName)
        {
            Image _im = new Image();
            _im.Source = getBitmapImageFromResources(sName);

            return _im;
        }
    }

   public static class XamlUtility
   {
        public static string makeResourcePngUri(string sName)
        {
            return "/MyApplication;component/Resources/" + sName + ".png";
        }

        public static BitmapImage getBitmapImageFromResources(string sName)
        {
            BitmapImage _bmi = null;
            _bmi = new BitmapImage(new Uri(makeResourcePngUri(sName), UriKind.Relative));

            return _bmi;
        }

        public static Image getImageFromResources(string sName)
        {
            Image _im = new Image();
            _im.Source = getBitmapImageFromResources(sName);

            return _im;
        }
    }
...
        public static MenuItem addMenuItem(ContextMenu ctxmenu, string name, bool visible = true, MenuClickHandler clickHandler = null, string imageName = null)
        {
            string _name = name.Replace(' ', '_');
            MenuItem menu = new MenuItem()
            {
                Name = "mnu" + _name,
                Header = name,
                Icon = XamlUtility.getImageFromResources(imageName ?? _name)
            };

…

The image only loads if I have it previously loaded (e.g. create an image control on some xaml form prior to generating the ContextMenu).

This used to work (it wasn’t a high priority to fix so I don’t know when it stopped working)

Answer 1

in your getBitmapImageFromResources method add

_bmi.CreateOptions = BitmapCreateOptions.IgnoreImageCache;