ADOIsolationLevelプロパティ_
❮完全な接続オブジェクトリファレンス
IsolationLevelプロパティは、Connectionオブジェクトの分離レベルを設定または返します。値はIsolationLevelEnum値です。デフォルトはadXactChaosです。
注： IsolationLevel設定は、次にBeginTransが呼び出されるまで機能しません。
構文
objconn.IsolationLevel
例
<%
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
%>
IsolationLevelEnum
| 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. |
❮完全な接続オブジェクトリファレンス