If the cursor is not yet initialized, MoveNextUnique is identical to
MoveFirst(LockingInfo). Otherwise, move the cursor to
the next non-duplicate key in the database, and store that key and
associated datum in Current. MoveNextUnique
returns false if no non-duplicate key/data pairs exist after the
cursor position in the database. 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, MoveNextUnique 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 MoveNextUnique( DatabaseEntry key, DatabaseEntry data, LockingInfo info ) |
Visual Basic (Declaration) |
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Public Function MoveNextUnique ( _ key As DatabaseEntry, _ data As DatabaseEntry, _ info As LockingInfo _ ) As Boolean |
Visual C++ |
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public: bool MoveNextUnique( 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 the database is a Queue or Recno database, MoveNextUnique ignores any keys that exist but were never explicitly created by the application, or those that were created and later deleted.
If positioning the cursor fails, Current contains an empty KeyValuePair<(Of <(TKey, TValue>)>).