C＃ - 如何在SQL Server中实现begin trans，commit trans和rollback

Question

我想在我的代码中插入一个函数，即begin，commit和rollback trans，因为数据容易出错。我的代码是这样的：

clsDBConnect dbConn = new clsDBConnect();
SqlCommand CMD;
SqlDataReader Reader;

private void Save()
{
     CMD = new SqlCommand("SELECT * FROM tblEmployees", dbConn.connection);

     Reader = CMD.ExecuteReader();

     while (Reader.Reader())
     {
          while(variable1 != variable2)
          {
               //Lots of CMD.ExecuteNonQuery();
               //Lots of Reader
               //Lots of computation
               variable1 += 1;
          }
     }
}

如何在循环期间发生错误时回滚插入和更新？

谢谢！

Answer 1

事务处理以这样的方式完成：

DbTransaction trans = dbConn.BeginTransaction();
try
{
    // ... do your stuff...

    // Last line of the try-block... if you are still alive here, commit
    trans.Commit();
}
catch (Exception e)
{
     // Something evil happened... Rollback
     trans.Rollback();
}