学步园

string sql1 = "...";    
  string sql2 = "...";    
  SqlConnection conn = new SqlConnection("...");    //建立数据库连接
  conn.Open();    //接开数据库连接
  SqlTransaction tran = conn.BeginTransaction();   //开始进行交易处理
  SqlCommand comm = new SqlCommand();
  comm.Connection = conn;
  comm.Transaction = tran;
  try
  {
   comm.CommandText = sql1;
   comm.ExecuteNonQuery();
   comm.CommandText = sql2;
   comm.ExecuteNonQuery();
   tran.Commit();    //接受交易，完成操作
  }catch
  {
   tran.Rollback();    //交易失败，恢复数据
  }
  finally
  {
   conn.Close();    //关闭数据库连接。
  }

2.数据库方法
BEGIN TRANSACTION
select * from student
select * form code
IF (@@ERROR > 0)
     ROLLBACK TRANSACTION
ELSE
    COMMIT TRANSACTION