public DataBaseTableBLL(string dataBaseLinkId) { DataBaseLinkEntity dataBaseLinkEntity = new DataBaseLinkBLL().GetEntity(dataBaseLinkId); if (dataBaseLinkEntity != null) { switch (dataBaseLinkEntity.F_DbType) { case "SqlServer": service = new DataBaseTableService(); break; case "Oracle": service = new DataBaseTableService_O(); break; case "MySql": service = new DataBaseTableService_M(); break; default: service = new DataBaseTableService(); break; } } else { service = new DataBaseTableService(); } }