public void UseTransaction()
{
Database db = DatabaseFactory.CreateDatabase();
DbCommand dbcomm1 = db.GetSqlStringCommand("update person set name='pw'");
DbCommand dbcomm2 = db.GetSqlStringCommand("delete from person where id=1");
using (DbConnection conn = db.CreateConnection())
{
//打开连接
conn.Open();
//创建事务
DbTransaction trans = conn.BeginTransaction();