ADO IsolationLevel Property
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Met de eigenschap IsolationLevel wordt het isolatieniveau van een Connection-object ingesteld of geretourneerd. De waarde is een IsolationLevelEnum- waarde. Standaard is adXactChaos.
Opmerking: de IsolationLevel-instellingen werken pas als BeginTrans de volgende keer wordt aangeroepen.
Syntaxis
objconn.IsolationLevel
Voorbeeld
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.IsolationLevel=adXactIsolated
conn.Open(Server.Mappath("northwind.mdb"))
response.write(conn.IsolationLevel)
conn.Close
%>
IsolatieNiveauEnum
| Constant | Value | Description |
|---|---|---|
| adXactUnspecified | -1 | Cannot use the specified isolation level, because the provider is using a different isolation level, and that level cannot be determined. |
| adXactChaos | 16 | Cannot overwrite higher level transactions. |
| adXactBrowse | 256 | Can view uncommitted changes in other transactions. |
| adXactReadUncommitted | 256 | Same as adXactBrowse. |
| adXactCursorStability | 4096 | Can view committed changes in other transactions. |
| adXactReadCommitted | 4096 | Same as adXactCursorStability. |
| adXactRepeatableRead | 65536 | Cannot see changes in other transactions, but you can requery |
| adXactIsolated | 1048576 | Your transactions are isolated from all other transactions. |
| adXactSerializable | 1048576 | Same as adXactIsolated. |
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