public List<ComboTree> GetComboTreeCategory(int id)
        {
            IProductCategoryService productCategoryService = new ProductCategoryService();
            var data = productCategoryService.GetProductCategory();
            List<ComboTree> result=new List<ComboTree>();

            var root = data.Where(s => s.Depth == id);
            foreach (var categoryInfo in root)
            {
                var comboTree = new ComboTree();
                comboTree.Id = categoryInfo.Id;
                comboTree.Text = categoryInfo.Name;
                comboTree.Children = GetComboTreeChildren(comboTree, categoryInfo, data);
                result.Add(comboTree);
            }
            return result;
        }
        public List<ComboTree> GetComboTreeChildren2(ComboTree comboTree, ArticleCategoryInfo category, List<ArticleCategoryInfo> data)
        {
            var childrens =
                data.Where(s => s.Depth == category.Depth + 1 && s.Lft > category.Lft && s.Rgt < category.Rgt);
            var childs = new List<ComboTree>();
            foreach (var productCategoryInfo in childrens)
            {
                var child = new ComboTree();
                child.Id = productCategoryInfo.Id;
                child.Text = productCategoryInfo.Name;
                childs.Add(child);
            }

            comboTree.Children = childs;

            foreach (var child in comboTree.Children)
            {
                var temp = data.FirstOrDefault(s => s.Id == child.Id);
                if (temp != null)
                {
                    this.GetComboTreeChildren2(child, temp, data);
                }
            }
            return comboTree.Children;
        }
        public List<ComboTree> GetComboTreeArticleCategory(int id)
        {
            IArticleCategoryService articleCategoryService = new ArticleCategoryService();
            var data = articleCategoryService.GetAllArticleCategory();
            List<ComboTree> result = new List<ComboTree>();

            var root = data.Where(s => s.Depth == id);
            foreach (var articleCategoryInfo in root)
            {
                var comboTree = new ComboTree();
                comboTree.Id = articleCategoryInfo.Id;
                comboTree.Text = articleCategoryInfo.Name;
                comboTree.Children = GetComboTreeChildren2(comboTree, articleCategoryInfo, data);
                result.Add(comboTree);
            }
            return result;
        }