mysql 事务处理

/// <summary>
        /// 执行多条SQL语句，实现数据库事务。
        /// </summary>mysql数据库
        /// <param name="SQLStringList">多条SQL语句</param>
        public static void ExecuteSqlTran(List<string> SQLStringList)
        {
            using (MySqlConnection conn = new MySqlConnection(MySqlHelper.ConnStr))
            {
                conn.Open();
                MySqlCommand cmd = new MySqlCommand();
                cmd.Connection = conn;
                MySqlTransaction tx = conn.BeginTransaction();
                cmd.Transaction = tx;
                try
                {
                    for (int n = 0; n < SQLStringList.Count; n++)
                    {
                        string strsql = SQLStringList[n].ToString();
                        if (strsql.Trim().Length > 1)
                        {
                            cmd.CommandText = strsql;
                            cmd.ExecuteNonQuery();
                        }
                       //后来加上的
                       if (n > 0 && (n % 500 == 0 || n == SQLStringList.Count - 1))
                        {
                            tx.Commit();
                            tx = conn.BeginTransaction();
                        }
                    }
                    //tx.Commit();//原来一次性提交
                }
                catch (System.Data.SqlClient.SqlException E)
                {
                    tx.Rollback();
                    throw new Exception(E.Message);
                }
            }
        }