zhudiwoaini的专栏

项目中用 db.TB_Teacher.SingleOrDefault(a => a.ID ==Sql.Convertto.from(item.ObjectID)); Sql.Convertto.from()方法经常报错。而且不定时报错。然后想想既然正着来不行。那就逆着来吧。然后就改成了 db.TB_Teacher.SingleOrDefault(a => (a.ID+"").Trim() ==

t4模版用linq是相当好用的。linq查询如下： 1， var db = new Shop30();//先new一个shop30是数据库名称。 2，       lunbo = db.TB_Advert.Where(a => a.AdID == 51 && a.SiteID == siteinfo.ID && a.Flag == 0).OrderByDescending(a => a.Cre