If the cursor is not yet initialized, MoveNextUnique is identical to
MoveFirst()()(). 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 ) |
Visual Basic (Declaration) |
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Public Function MoveNextUnique ( _ key As DatabaseEntry, _ data As DatabaseEntry _ ) As Boolean |
Visual C++ |
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public: bool MoveNextUnique( DatabaseEntry^ key, DatabaseEntry^ data ) |
Parameters
- key
- Type: BerkeleyDB..::.DatabaseEntry
The retrieved key
- data
- Type: BerkeleyDB..::.DatabaseEntry
The retrieved data
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>)>).