Поделиться через


ODBC Classes

These classes work with the other application framework classes to give easy access to a wide variety of databases for which Open Database Connectivity (ODBC) drivers are available.

Programs that use ODBC databases will have at least a CDatabase object and a CRecordset object.

  • CDatabase
    Encapsulates a connection to a data source, through which you can operate on the data source.

  • CRecordset
    Encapsulates a set of records selected from a data source. Recordsets enable scrolling from record to record, updating records (adding, editing, and deleting records), qualifying the selection with a filter, sorting the selection, and parameterizing the selection with information obtained or calculated at run time.

  • CRecordView
    Provides a form view directly connected to a recordset object. The dialog data exchange (DDX) mechanism exchanges data between the recordset and the controls of the record view. Like all form views, a record view is based on a dialog template resource. Record views also support moving from record to record in the recordset, updating records, and closing the associated recordset when the record view closes.

  • CDBException
    An exception resulting from failures in data access processing. This class serves the same purpose as other exception classes in the exception-handling mechanism of the class library.

  • CFieldExchange
    Supplies context information to support record field exchange (RFX), which exchanges data between the field data members and parameter data members of a recordset object and the corresponding table columns on the data source. Analogous to class CDataExchange, which is used similarly for dialog data exchange (DDX).

  • CLongBinary
    Encapsulates a handle to storage for a binary large object (BLOB), such as a bitmap. CLongBinary objects are used to manage large data objects stored in database tables.

  • CDBVariant
    Allows you to store a value without worrying about the value's data type. CDBVariant tracks the data type of the current value, which is stored in a union.

See Also

Concepts

Class Library Overview