public List <CategoryItems> QueryNodesByIndex(string keySpell)
        {
            CategoryItems item = new CategoryItems()
            {
                IndexSpell = "%" + keySpell + "%"
            };
            DataSet ds = new SqlCmdHelper()
            {
                SqlConnString = SqlConnString
            }.GenerateQuerySqlAndExcute(item.GetQueryByIndexSpell(), item);

            return(DataHelp.DataReflection.DataSetConvert <CategoryItems>(ds));
        }