this.Request.Engine.BizObjectManager.CopyFiles("原-主表编码", "原-子表编码", "原-子表内附件控件编码", "原-子表数据ObjectId", "新-主表编码","", "新-主表内附件控件编码", "新-主表数据ObjectId", true, true); 子表向主表插入附件，如果是创建，则附件代码在创建后面，如果是更新则不需要
