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LockType Property

Indicates the type of locks placed on records during editing.

Settings and Return Values

Sets or returns one of the following LockTypeEnum values:

Constant

Value

Description

adLockReadOnly

1

Read-only you cannot alter the data.

adLockPessimistic

2

Pessimistic locking, record by record the provider does what is necessary to ensure successful editing of the records, usually by locking records at the data source immediately upon editing.

adLockOptimistic

3

Optimistic locking, record by record the provider uses optimistic locking, locking records only when you call the Update method.

adLockBatchOptimistic

4

Optimistic batch updates required for batch update mode as opposed to immediate update mode.

Remarks

Use the LockType property to determine what type of locking the provider should use when opening a Recordset object or to return the type of locking in use on an open Recordset object. The LockType property is read/write when the Recordset is closed and read-only when it is open.

Providers may not support all lock types. If a provider cannot support the requested LockType setting, it will substitute another type of locking. To determine the actual locking functionality available in a Recordset object, use the Supports method.

Note To use batch updating (adLockBatchOptimistic), you should select either a keyset or static cursor.

Applies To

Recordset

See Also

CancelBatch, UpdateBatch


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