ADO LockType Property
Complete Recordset Object Reference
The LockType property sets or returns a LockTypeEnum value that specifies the type of locking when editing a record in a Recordset. Default is adLockReadOnly. This property is read/write on a closed Recordset and read-only on an open Recordset.
Note: Set this property before opening the Recordset.
Note: Not all providers support all lock types. If the requested LockType setting is not supported, the provider will choose another type of locking. You can use the Supports method to determine the actual locking functionality available in a Recordset object.
Note: adLockPessimistic is not supported if CursorLocation is set to adUseClient.
Syntax
objRecordset.LockType
Example
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open(Server.Mappath("northwind.mdb"))
set rs=Server.CreateObject("ADODB.recordset")
sql="SELECT * FROM Customers"
rs.CursorLocation=adUseClient
rs.CursorType=adOpenStatic
rs.LockType=adLockBatchOptimistic
rs.Open sql,conn
rs.Close
conn.Close
%>
LockTypeEnum Values
| Constant | Value | Description |
|---|---|---|
| adLockUnspecified | -1 | Unspecified type of lock. Clones inherits lock type from the original Recordset. |
| adLockReadOnly | 1 | Read-only records |
| adLockPessimistic | 2 | Pessimistic locking, record by record. The provider lock records immediately after editing |
| adLockOptimistic | 3 | Optimistic locking, record by record. The provider lock records only when calling update |
| adLockBatchOptimistic | 4 | Optimistic batch updates. Required for batch update mode |
Complete Recordset Object Reference
