static IEnumerable<JsTreeModel> GetParent1(IEnumerable<DataRow> tab, int id, int parent_id)
        {
            var dataRows = tab as DataRow[] ?? tab.ToArray();
            foreach (var e in dataRows.Where(x => x.Field<int>("id") == id))
            {
                yield return new JsTreeModel { data = e.Field<string>("NAME"), attr = new JsTreeAttribute { id = e.Field<int>("id").ToString() }, 
                  
                    children = new JsTreeModel[] { GetParent1(dataRows, e.Field<int>("id"), e.Field<int>("parent_id")) } 
                };
            }
            foreach (var e in dataRows.Where(x => x.Field<int>("id") == parent_id))
            {
                foreach (var u in GetParent1(dataRows, e.Field<int>("id"), e.Field<int>("parent_id")))
                {
                    yield return u;
                }
            }
        }