IRowsetUpdateImpl Class
The OLE DB Templates implementation of the IRowsetUpdate interface.
template <
class T,
class Storage,
class UpdateArray = CAtlArray<Storage>,
class RowClass = CSimpleRow,
class MapClass = CAtlMap <RowClass::KeyType, RowClass*>
>
class IRowsetUpdateImpl : public IRowsetChangeImpl<
T,
Storage,
IRowsetUpdate,
RowClass,
MapClass
>
Parameters
T
A class derived from IRowsetUpdateImpl.Storage
The user record.UpdateArray
An array containing cached data for updating the rowset.RowClass
The storage unit for the HROW.MapClass
The storage unit for all row handles held by the provider.
Members
Interface Methods (Used with IRowsetChange)
Sets data values in one or more columns. |
Interface Methods (Used with IRowsetUpdate)
Gets the data most recently transmitted to or obtained from the data source, ignoring pending changes. |
|
Returns a list of rows with pending changes. |
|
Returns the status of specified rows. |
|
Undoes any changes to the row since the last fetch or update. |
|
Transmits any changes made to the row since the last fetch or update. |
Implementation Methods (Callback)
Used to check for security, integrity, and so on before allowing updates. |
Data Members
Contains the original data for the deferred operation. |
Remarks
You should first read and understand the documentation for IRowsetChange, because everything described there also applies here. You should also read chapter 6 of the OLEDBProgrammer'sReference on setting data.
IRowsetUpdateImpl implements the OLE DB IRowsetUpdate interface, which enables consumers to delay the transmission of changes made with IRowsetChange to the data source and undo changes before transmission.
Important
It is strongly recommended that you read the following documentation BEFORE attempting to implement your provider:
Chapter 6 of the OLEDBProgrammer'sReference
Also see how the RUpdateRowset class is used in the UpdatePV sample
Requirements
Header: atldb.h
See Also
Concepts
OLE DB Provider Templates (C++)