If the cursor is not yet initialized, MovePrevUnique is identical to MoveLast()()(). Otherwise, move the cursor to the previous non-duplicate key in the database, and store the secondary key and primary key/data pair in Current. MovePrevUnique will return false if no non-duplicate key/data pairs exist after the cursor position in the database. 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, MovePrevUnique is successful, and any existing bytes are returned.

Namespace:  BerkeleyDB
Assembly:  libdb_dotnet52 (in libdb_dotnet52.dll) Version:


public bool MovePrevUnique(
	DatabaseEntry key,
	DatabaseEntry pkey,
	DatabaseEntry data
Visual Basic (Declaration)
Public Function MovePrevUnique ( _
	key As DatabaseEntry, _
	pkey As DatabaseEntry, _
	data As DatabaseEntry _
) As Boolean
Visual C++
bool MovePrevUnique(
	DatabaseEntry^ key, 
	DatabaseEntry^ pkey, 
	DatabaseEntry^ data


Type: BerkeleyDB..::.DatabaseEntry
The retrieved key in secondary db
Type: BerkeleyDB..::.DatabaseEntry
The key of the matching record in primary db
Type: BerkeleyDB..::.DatabaseEntry
The data of the matching record in primary db

Return Value

True if the cursor was positioned successfully, false otherwise.


If positioning the cursor fails, Current will contain an empty KeyValuePair<(Of <(TKey, TValue>)>).

See Also