可以直接使用OracleTransaction对象做事务处理

using(var transaction = connection.BeginTransaction())
{
.....在这个作用域上的数据库操作，必须基于这个transaction
using(var command = new OracleCommand(commandText, connection) { Transaction = transaction })
{
...
}
...
transaction.Commit(); //transaction.Rollback();
}

2. 多个数据库连接

可以使用TransactionScope对象来维护多个数据库连接中的事务处理

var options = new TransactionOptions { IsolationLevel = System.Transactions.IsolationLevel.ReadCommitted, Timeout = new TimeSpan(0, 2, 0) };
 
using (var transaction = new TransactionScope(TransactionScopeOption.Required, options))
{
.....在这个作用域里面的数据库操作，不需要传递transaction对象
using(var connection1 = new OracleConnection(connectionString1))
{
...
}
 
using(var connection2 = new OracleConnection(connectionString2))
{
...
}
 
transaction.Complete();
}

注1: 使用TransactionScope对象前，需要添加引用System.Transaction

注2: 对于多个Oracle连接来说，使用TransactionScope对象前，需要安装Oracle Services For MTS (Microsoft Transaction Server)。下载地址：http://goo.gl/XrKn

// Usually you wouldn’t cast an instance of an existing Enum to an int
// in order to create an Enum instance. :-) You would have the actual
// integer value, perhaps a value from a database where the int value of
// the enum was stored.

DayOfWeek wednesday =
(DayOfWeek)Enum.ToObject(typeof(DayOfWeek), (int)DayOfWeek.Wednesday);
DayOfWeek sunday =
(DayOfWeek)Enum.ToObject(typeof(DayOfWeek), (int)DayOfWeek.Sunday);
DayOfWeek tgif =
(DayOfWeek)Enum.ToObject(typeof(DayOfWeek), (int)DayOfWeek.Friday);

lblOutput.Text = wednesday.ToString()
+ “. Int value = ” + ((int)wednesday).ToString() + “\n”;
lblOutput.Text += sunday.ToString()
+ “. Int value = ” + ((int)sunday).ToString() + “\n”;
lblOutput.Text += tgif.ToString()
+ “. Int value = ” + ((int)tgif).ToString() + “\n”;
}

Result:

Wednesday. Int value = 3
Sunday. Int value = 0
Friday. Int value = 5

Link: http://www.cambiaresearch.com/c4/52a7e5fe-c7fc-49ab-b21d-37e6194687f3/Convert-Integer-To-Enum-Instance-in-csharp.aspx