/// <summary>
        /// 删除一条数据,及子表所有相关数据
        /// </summary>
        public bool Delete(int id)
        {
            Hashtable sqllist = new Hashtable();
            //删除管理角色权限
            StringBuilder strSql = new StringBuilder();

            strSql.Append("delete from " + databaseprefix + "manager_role_value ");
            strSql.Append(" where role_id=@role_id");
            MySqlParameter[] parameters =
            {
                new MySqlParameter("@role_id", MySqlDbType.Int32, 4)
            };
            parameters[0].Value = id;
            sqllist.Add(strSql.ToString(), parameters);

            //删除管理角色
            StringBuilder strSql2 = new StringBuilder();

            strSql2.Append("delete from " + databaseprefix + "manager_role ");
            strSql2.Append(" where id=@id");
            MySqlParameter[] parameters2 =
            {
                new MySqlParameter("@id", MySqlDbType.Int32, 4)
            };
            parameters2[0].Value = id;
            sqllist.Add(strSql2.ToString(), parameters2);

            bool result = DbHelperMySql.ExecuteSqlTran(sqllist);

            if (result)
            {
                return(true);
            }
            else
            {
                return(false);
            }
        }