/// <summary>
        /// 删除指定附件id列表的附件信息及其物理文件
        /// </summary>
        /// <param name="aidList">附件id列表</param>
        /// <returns>删除附件数</returns>
        public static int DeleteGoodsAttachment(string aidList)
        {
            GoodsattachmentinfoCollection goodsAttchmentInfoColl = DTO.GetGoodsAttachmentInfoList(DbProvider.GetInstance().GetGoodsAttachmentListByAidList(aidList));
            int goodsId = 0;

            if (goodsAttchmentInfoColl != null)
            {
                foreach (Goodsattachmentinfo goodsattachmentinfo in goodsAttchmentInfoColl)
                {
                    if (goodsattachmentinfo.Filename.Trim().ToLower().IndexOf("http") < 0)
                    {
                        string attachmentFilePath = Utils.GetMapPath(BaseConfigs.GetForumPath + "upload/" + goodsattachmentinfo.Filename);
                        if (Utils.FileExists(attachmentFilePath))
                        {
                            File.Delete(attachmentFilePath);
                        }
                    }
                    goodsId = Utils.StrToInt(goodsattachmentinfo.Goodsid, 0);
                }
            }
            return(DbProvider.GetInstance().DeleteGoodsAttachment(aidList));
        }
 /// <summary>
 /// 获取指定商品id的所有附件信息
 /// </summary>
 /// <param name="goodsid">商品id</param>
 /// <returns>附件信息集合</returns>
 public static GoodsattachmentinfoCollection GetGoodsAttachmentsByGoodsid(int goodsId)
 {
     return(DTO.GetGoodsAttachmentInfoList(DbProvider.GetInstance().GetGoodsAttachmentsByGoodsid(goodsId)));
 }