private void FillViewList(List <GoodsItem> list)
        {
            ItemsList.Clear();
            var b = from c in list.OrderByDescending(a => a.Value).GroupBy(a => a.Ttype)
                    where c.Count() > 0
                    select new GroupItem(c.Count(), c.FirstOrDefault().Name, c.FirstOrDefault().Ttype, c.FirstOrDefault().Value);

            ItemsList.AddRange(b);
        }