DevGuru ADO Connection.IsolationLevel Property

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PROPERTY: Connection::IsolationLevel

IsolationLevelEnum = connectionobject.IsolationLevel
connectionobject.IsolationLevel = IsolationLevelEnum

The IsolationLevel property is the level of transaction isolation for a Connection object. The purpose of the isolation level is to define how other transactions can interact with your transactions, and vice versa. For example, can you see changes in other transactions before or after they are committed? This property only goes into effect after you make a BeginTrans method call.

This property sets or returns an IsolationLevelEnum value. If the requested level is not available, the provider may be able to set the IsolationLevel to the next higher level.

IsolationLevelEnum Constants

Constant	Value	Description
adXactUnspecified	-1	Cannot use the provided isolation level and cannot determine the isolation level
adXactChaos	16	Cannot overwrite higher level transactions
adXactBrowse	256	Allows you to view uncommitted changes in other transactions
adXactReadUncommitted	256	Same as adXactBrowse
adXactCursorStability	4096	Allows you to view changes in other transactions only after they are committed
adXactReadCommitted	4096	Same as adXactCursorStability
adXactRepeatableRead	65536	Cannot see changes made in other transactions, but allows you to requery
adXactIsolated	1048576	Your transactions are completely isolated from all other transactions
adXactSerializable	1048576	Same as adXactIsolated

Code (VBScript):
Set objConnection = Server.CreateObject("ADODB.Connection")
objConnection.Mode = adModeRead
objConnection.IsolationLevel = adXactIsolated
...
objConnection.Open strConnect