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ADO IsolationLevel 属性


❮ 连接对象完整参考

IsolationLevel 属性设置或返回 Connection 对象的隔离级别。该值是 IsolationLevelEnum 值。默认为 adXactChaos。

注意:在下次调用 BeginTrans 之前,IsolationLevel 设置不会生效。


语法

objconn.IsolationLevel

示例

<%
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

常量 描述
adXactUnspecified -1 无法使用指定的隔离级别,因为提供程序正在使用不同的隔离级别,并且无法确定该级别。
adXactChaos 16 无法覆盖更高级别的交易。
adXactBrowse 256 可以查看其他事务中未提交的更改。
adXactReadUncommitted 256 与 adXactBrowse 相同。
adXactCursorStability 4096 可以查看其他事务中已提交的更改。
adXactReadCommitted 4096 与 adXactCursorStability 相同。
adXactRepeatableRead 65536 无法查看其他事务中的更改,但可以重新查询
adXactIsolated 1048576 您的事务与所有其他事务隔离。
adXactSerializable 1048576 与 adXactIsolated 相同。

❮ 连接对象完整参考
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