IColumnsInfoImpl Class
Provides an implementation of the IColumnsInfo interface.
template <class T>
class ATL_NO_VTABLE IColumnsInfoImpl :
public IColumnsInfo,
public CDBIDOps
T
Your class, derived from IColumnsInfoImpl.
Header: atldb.h
| Name | Description |
|---|---|
| GetColumnInfo | Returns the column metadata needed by most consumers. |
| MapColumnIDs | Returns an array of ordinals of the columns in a rowset that are identified by the specified column IDs. |
A mandatory interface on rowsets and commands. To modify the behavior of your provider's IColumnsInfo implementation, you need to modify the provider column map.
Returns the column metadata needed by most consumers.
STDMETHOD (GetColumnInfo)(DBORDINAL* pcColumns,
DBCOLUMNINFO** prgInfo,
OLECHAR** ppStringsBuffer);
See IColumnsInfo::GetColumnInfo in the OLE DB Programmer's Reference.
Returns an array of ordinals of the columns in a rowset that are identified by the specified column IDs.
STDMETHOD (MapColumnIDs)(DBORDINAL cColumnIDs,
const DBID rgColumnIDs[],
DBORDINAL rgColumns[]);
See IColumnsInfo::MapColumnIDs in the OLE DB Programmer's Reference.
OLE DB Provider Templates
OLE DB Provider Template Architecture