Inheritance: RaumfeldNET.Base.BaseHelper
        // save visual position of a list
        public void saveMediaItemListPosition(ListBox _list, MediaList _mediaList)
        {
            if (_list == null || _mediaList == null)
                return;

            ScrollViewer sv = (ScrollViewer)this.getScrollViewer(_list);
            if (sv != null)
                _mediaList.visualPosition = sv.VerticalOffset;
        }
        // this method fills a given listView with Raumfeld mediaList Data and scrolls the view to a specific position if given on the mediaList
        public void setMediaItemListViewData(ListBox _listView, MediaList _mediaList)
        {
            try
            {
                lock (_listView)
                {

                    _listView.ItemsSource = _mediaList.list;
                    _listView.Items.Refresh();

                    ScrollViewer sv = (ScrollViewer)this.getScrollViewer(_listView);
                    if (sv != null && _mediaList != null && _mediaList.visualPosition != null)
                        sv.ScrollToVerticalOffset((double)_mediaList.visualPosition);
                }

            }
            catch (Exception ex)
            {
                throw (ex);
            }

            this.loadMediaItemListViewImages(_listView);
        }