/// <summary> /// 产生一个全局唯一标识符 /// </summary> /// <returns>返回全局唯一标识符</returns> public static Guid NewGuid(DataAccessType pdbtype) { switch (pdbtype) { case DataAccessType.SqlClient: return(SqlQueryDAO.NewGuid()); case DataAccessType.OLEDB: return(OleDbQueryDAO.NewGuid()); case DataAccessType.ODPNet: return(OdpQueryDAO.NewGuid()); default: throw(new Exception("此种访问方式没有定义!")); } }