Instantiate a new HashDatabase object and open the database represented by Filename.

Namespace:  BerkeleyDB
Assembly:  libdb_dotnet52 (in libdb_dotnet52.dll) Version: 5.2.28.0

Syntax

C#
public static HashDatabase Open(
	string Filename,
	HashDatabaseConfig cfg,
	Transaction txn
)
Visual Basic (Declaration)
Public Shared Function Open ( _
	Filename As String, _
	cfg As HashDatabaseConfig, _
	txn As Transaction _
) As HashDatabase
Visual C++
public:
static HashDatabase^ Open(
	String^ Filename, 
	HashDatabaseConfig^ cfg, 
	Transaction^ txn
)

Parameters

Filename
Type: System..::.String
The name of an underlying file that will be used to back the database. In-memory databases never intended to be preserved on disk may be created by setting this parameter to null.
cfg
Type: BerkeleyDB..::.HashDatabaseConfig
The database's configuration
txn
Type: BerkeleyDB..::.Transaction
If the operation is part of an application-specified transaction, txn is a Transaction object returned from BeginTransaction()()(); if the operation is part of a Berkeley DB Concurrent Data Store group, txn is a handle returned from BeginCDSGroup()()(); otherwise null.

Return Value

A new, open database object

Remarks

If Filename is null, the database is strictly temporary and cannot be opened by any other thread of control, thus the database can only be accessed by sharing the single database object that created it, in circumstances where doing so is safe.

If txn is null, but AutoCommit is set, the operation will be implicitly transaction protected. Note that transactionally protected operations on a datbase object requires the object itself be transactionally protected during its open. Also note that the transaction must be committed before the object is closed.

See Also