If the previous key/data pair of the database is a duplicate data
record for the current key/data pair, the cursor is moved to the
previous key/data pair of the database, and that pair is stored in
Current. MovePrevDuplicate returns false if the
previous key/data pair of the database is not a duplicate data
record for the current key/data pair. If either the key or the
data is partial DatabaseEntry, its
PartialLen bytes starting
PartialOffset bytes from the beginning
of the retrieved data record are returned as if they comprised the
entire record. If any or all of the specified bytes do not exist
in the record, MovePrevDuplicate is successful, and any existing
bytes are returned.
Namespace:
BerkeleyDBAssembly: libdb_dotnet181 (in libdb_dotnet181.dll) Version: 18.1.32.0
Syntax
C# |
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public bool MovePrevDuplicate( DatabaseEntry key, DatabaseEntry data, LockingInfo info ) |
Visual Basic (Declaration) |
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Public Function MovePrevDuplicate ( _ key As DatabaseEntry, _ data As DatabaseEntry, _ info As LockingInfo _ ) As Boolean |
Visual C++ |
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public: bool MovePrevDuplicate( DatabaseEntry^ key, DatabaseEntry^ data, LockingInfo^ info ) |
Parameters
- key
- Type: BerkeleyDB..::.DatabaseEntry
The retrieved key
- data
- Type: BerkeleyDB..::.DatabaseEntry
The retrieved data
- info
- Type: BerkeleyDB..::.LockingInfo
The locking behavior to use.
Return Value
True if the cursor was positioned successfully, false otherwise.Remarks
If positioning the cursor fails, Current contains
an empty KeyValuePair<(Of <(TKey, TValue>)>).