CDatabase Class Members

Data Members

m_hdbc Open Database Connectivity (ODBC) connection handle to a data source. Type HDBC.

Construction

CDatabase Constructs a CDatabase object. You must initialize the object by calling OpenEx or Open.
Open Establishes a connection to a data source (through an ODBC driver).
OpenEx Establishes a connection to a data source (through an ODBC driver).
Close Closes the data source connection.

Database Attributes

GetConnect Returns the ODBC connect string used to connect the CDatabase object to a data source.
IsOpen Returns nonzero if the CDatabase object is currently connected to a data source.
GetDatabaseName Returns the name of the database currently in use.
CanUpdate Returns nonzero if the CDatabase object is updatable (not read-only).
CanTransact Returns nonzero if the data source supports transactions.
SetLoginTimeout Sets the number of seconds after which a data source connection attempt will time out.
SetQueryTimeout Sets the number of seconds after which database query operations will time out. Affects all subsequent recordset Open, AddNew, Edit, and Delete calls.
GetBookmarkPersistence Identifies the operations through which bookmarks persist on recordset objects.
GetCursorCommitBehavior Identifies the effect of committing a transaction on an open recordset object.
GetCursorRollbackBehavior Identifies the effect of rolling back a transaction on an open recordset object.

Database Operations

BeginTrans Starts a “transaction” — a series of reversible calls to the AddNew, Edit, Delete, and Update member functions of class CRecordset — on the connected data source. The data source must support transactions for BeginTrans to have any effect.
BindParameters Allows you to bind parameters before calling CDatabase::ExecuteSQL.
CommitTrans Completes a transaction begun by BeginTrans. Commands in the transaction that alter the data source are carried out.
Rollback Reverses changes made during the current transaction. The data source returns to its previous state, as defined at the BeginTrans call, unaltered.
Cancel Cancels an asynchronous operation or a process from a second thread.
ExecuteSQL Executes an SQL statement. No data records are returned.

Database Overridables

OnSetOptions Called by the framework to set standard connection options. The default implementation sets the query timeout value. You can establish these options ahead of time by calling SetQueryTimeout.

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