//注册用户搜索需求信息3
        public List<Commodity> SearchDemandInfo(String KeyWord)
        {
            List<Commodity> CommodityList = new List<Commodity>();
            DatabaseAccess.DataClasses1DataContext DBAccessor = new DataClasses1DataContext();

            //调用存储过程查找数据库
            ISingleResult<searchDemandInfoResult> ResultList = DBAccessor.searchDemandInfo(KeyWord, (int)CommodityKind.ALL);

            //获取返回值
            foreach (searchDemandInfoResult a in ResultList)
            {
                Commodity commodity = new Commodity();
                commodity.ID = a.id;
                commodity.UserName = a.userfrom;
                commodity.Name = a.name;
                commodity.description = a.discription;
                commodity.EndTime = (DateTime)a.endtime;
                commodity.kind = (CommodityKind)((int)a.kind);
                commodity.popularity = (int)a.popularity;
                //加到列表中
                CommodityList.Add(commodity);
            }
            return CommodityList;
        }