/// <summary>
        /// 在同一事务中插入个实体对象,可用不同的实体对象向多表中插入数据
        /// </summary>
        /// <param name="p">实体对象集合</param>
        /// <returns>false表示操作失败</returns>
        public bool TransInsert(List<Parent> listP)
        {
            if (listP == null || listP.Count < 1) { return true; }
            bool flag = false;
            using (DbConnection con = db.CreateConnection())
            {
                DbTransaction trans = null;
                try
                {
                    con.Open();
                    trans = con.BeginTransaction();
                    string validMsg = "";
                    foreach (Parent p in listP)
                    {
                        if (!p.InsertValid(out validMsg)) { throw new Exception("类型 " + p.ToString() + " 的实体对象中的数据未通过验证,不能保存到数据库,以下字段不符合要求:" + validMsg); }
                        Hashtable ht = p.MappingTableInfo();
                        if (p.CountFields() > 0)
                        {
                            string table = ht[Constant.STR_DB_TABLE].ToString();
                            string key = GetFields(p, DB_Condition.Key);
                            string value = GetFields(p, DB_Condition.Value);
                            string cmdText = string.Format("INSERT INTO {0}({1}) VALUES({2})", table, key, value);
                            DbCommand cmd = AddArgsReturnCMD(p, cmdText);
                            db.ExecuteNonQuery(cmd, trans);
                        }

                    }
                    trans.Commit();
                    flag = true;
                }
                catch (Exception ex)
                {
                    if (trans != null)
                    {
                        trans.Rollback();
                    }
                    Utility.Logger.Error("使用事务批量插入实体类数据时发生异常:"+ ex.Message);
                    throw new Exception("使用事务批量插入实体类数据时发生异常", ex);
                }
                finally
                {
                    if (trans != null)
                    {
                        trans.Dispose();
                    }

                }
            }
            return flag;
        }