.NET中访问Oracle数据库链接：ORA-02041: client database did not begin a transaction 问题的处理。

[align=left].NET中访问Oracle中带有DB_LINK时对象时，会抛出一下异常[/align][align=left]ORA-02041: client database did not begin a transaction[/align][align=left]意思是要设置一个事务，但是简单的BeginTransaction[/align][align=left]好像并不能解决问题，以下是解决的代码（针对只读情况，更新操作未作试验）：[/align][align=left][/align][align=left][/align][align=left]OracleCommand command = new OracleCommand();[/align][align=left] oracleConnection1.Open();[/align][align=left] command.Connection = oracleConnection1;[/align][align=left] command.Transaction = oracleConnection1.BeginTransaction(IsolationLevel.ReadCommitted); [/align][align=left] command.CommandText = "SET TRANSACTION READ ONLY";[/align][align=left] OracleDataReader oraDr = command.ExecuteReader();[/align][align=left] command.CommandText = "select * from DGIS_SP_MIS_WORKFLOW";[/align][align=left] [/align][align=left] //command.Connection = oracleConnection1;[/align][align=left] //command.Transaction = oracleConnection1.BeginTransaction();[/align][align=left] oraDr = command.ExecuteReader(CommandBehavior.CloseConnection);[/align][align=left] command.Transaction.Commit();[/align][align=left] while (oraDr.Read() == true) [/align][align=left] {[/align][align=left] listBox1.Items.Add(oraDr.GetString(0));[/align] }