If the cursor is not yet initialized, MovePrev is identical to
MoveLast(LockingInfo). Otherwise, move the cursor to
the previous key/data pair of the database, and store the secondary
key and primary key/data pair in Current. In the
presence of duplicate key values, the value of
Current.Key may not change. If key, or
pkey, or 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, MovePrev is successful, and any existing bytes are
returned.
Namespace:
BerkeleyDBAssembly: libdb_dotnet52 (in libdb_dotnet52.dll) Version: 5.2.28.0
Syntax
C# |
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public bool MovePrev( DatabaseEntry key, DatabaseEntry pkey, DatabaseEntry data, LockingInfo info ) |
Visual Basic (Declaration) |
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Public Function MovePrev ( _ key As DatabaseEntry, _ pkey As DatabaseEntry, _ data As DatabaseEntry, _ info As LockingInfo _ ) As Boolean |
Visual C++ |
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public: bool MovePrev( DatabaseEntry^ key, DatabaseEntry^ pkey, DatabaseEntry^ data, LockingInfo^ info ) |
Parameters
- key
- Type: BerkeleyDB..::.DatabaseEntry
The retrieved key in secondary db
- pkey
- Type: BerkeleyDB..::.DatabaseEntry
The key of the matching record in primary db
- data
- Type: BerkeleyDB..::.DatabaseEntry
The data of the matching record in primary db
- 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 will contain
an empty KeyValuePair<(Of <(TKey, TValue>)>).