CRecordset

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CRecordset Class members

Data Members
Construction
Recordset Attributes
Recordset Update Operations
Recordset Navigation Operations
Other Recordset Operations
Recordset Overridables

Data Members

m_hstmt	Contains the ODBC statement handle for the recordset. Type HSTMT.
m_nFields	Contains the number of field data members in the recordset. Type UINT.
m_nParams	Contains the number of parameter data members in the recordset. Type UINT.
m_pDatabase	Contains a pointer to the CDatabase object through which the recordset is connected to a data source.
m_strFilter	Contains a CString that specifies a Structured Query Language (SQL) WHERE clause. Used as a filter to select only those records that meet certain criteria.
m_strSort	Contains a CString that specifies an SQL ORDER BY clause. Used to control how the records are sorted.

Construction

CRecordset	Constructs a CRecordset object. Your Derived class must provide a constructor that calls this one.
Open	Opens the recordset by retrieving the table or performing the query that the recordset represents.
Close	Closes the recordset and the ODBC HSTMT associated with it.

Recordset Attributes

CanAppend	Returns nonzero if new records can be added to the recordset via the AddNew member function.
CanBookmark	Returns nonzero if the recordset supports bookmarks.
CanRestart	Returns nonzero if Requery can be called to run the recordset’s query again.
CanScroll	Returns nonzero if you can scroll through the records.
CanTransact	Returns nonzero if the data source supports transactions.
CanUpdate	Returns nonzero if the recordset can be updated (you can add, update, or delete records).
GetODBCFieldCount	Returns the number of fields in the recordset.
GetRecordCount	Returns the number of records in the recordset.
GetStatus	Gets the status of the recordset: the index of the current record and whether a final count of the records has been obtained.
GetTableName	Gets the name of the table on which the recordset is based.
GetSQL	Gets the SQL string used to select records for the recordset.
IsOpen	Returns nonzero if Open has been called previously.
IsBOF	Returns nonzero if the recordset has been positioned before the first record. There is no current record.
IsEOF	Returns nonzero if the recordset has been positioned after the last record. There is no current record.
IsDeleted	Returns nonzero if the recordset is positioned on a deleted record.

Recordset Update Operations

AddNew	Prepares for adding a new record. Call Update to complete the addition.
CancelUpdate	Cancels any pending updates due to an AddNew or Edit operation.
Delete	Deletes the current record from the recordset. You must explicitly scroll to another record after the deletion.
Edit	Prepares for changes to the current record. Call Update to complete the edit.
Update	Completes an AddNew or Edit operation by saving the new or edited data on the data source.

Recordset Navigation Operations

GetBookmark	Assigns the bookmark value of a record to the parameter object.
Move	Positions the recordset to a specified number of records from the current record in either direction.
MoveFirst	Positions the current record on the first record in the recordset. Test for IsBOF first.
MoveLast	Positions the current record on the last record or on the last rowset. Test for IsEOF first.
MoveNext	Positions the current record on the next record or on the next rowset. Test for IsEOF first.
MovePrev	Positions the current record on the previous record or on the previous rowset. Test for IsBOF first.
SetAbsolutePosition	Positions the recordset on the record corresponding to the specified record number.
SetBookmark	Positions the recordset on the record specified by the bookmark.

Other Recordset Operations

Cancel	Cancels an asynchronous operation or a process from a second thread.
FlushResultSet	Returns nonzero if there is another result set to be retrieved, when using a predefined query.
GetFieldValue	Returns the value of a field in a recordset.
GetODBCFieldInfo	Returns specific kinds of information about the fields in a recordset.
GetRowsetSize	Returns the number of records you wish to retrieve during a single fetch.
GetRowsFetched	Returns the actual number of rows retrieved during a fetch.
GetRowStatus	Returns the status of the row after a fetch.
IsFieldDirty	Returns nonzero if the specified field in the current record has been changed.
IsFieldNull	Returns nonzero if the specified field in the current record is Null (has no value).
IsFieldNullable	Returns nonzero if the specified field in the current record can be set to Null (having no value).
RefreshRowset	Refreshes the data and status of the specified row(s).
Requery	Runs the recordset’s query again to refresh the selected records.
SetFieldDirty	Marks the specified field in the current record as changed.
SetFieldNull	Sets the value of the specified field in the current record to Null (having no value).
SetLockingMode	Sets the locking mode to “optimistic” locking (the default) or “pessimistic” locking. Determines how records are locked for updates.
SetParamNull	Sets the specified parameter to Null (having no value).
SetRowsetCursorPosition	Positions the cursor on the specified row within the rowset.

Recordset Overridables

Check	Called to examine the return code from an ODBC API function.
CheckRowsetError	Called to handle errors generated during record fetching.
DoBulkFieldExchange	Called to exchange bulk rows of data from the data source to the recordset. Implements bulk record field exchange (Bulk RFX).
DoFieldExchange	Called to exchange data (in both directions) between the field data members of the recordset and the corresponding record on the data source. Implements record field exchange (RFX).
GetDefaultConnect	Called to get the default connect string.
GetDefaultSQL	Called to get the default SQL string to execute.
OnSetOptions	Called to set options for the specified ODBC statement.
SetRowsetSize	Specifies the number of records you wish to retrieve during a fetch.