/**************OrderBy ,Groupby练习*******************/ //按学生的总分数按降序排列排序 var list = from s in ctx.T_Student join c in ctx.T_Score on s.stuNumber equals c
先来聊上5毛钱的“排序” Code: using (ApplicationDbContext Db=new ApplicationDbContext()) { var res = Db.Threes.OrderBy(t => t.Id); } So Easy.现实往往不是这样的,有时我们需要让它灵活一点,如下这样方在一个函数里 Code: public List<ApplicationDbContext.Three> GetAll() { using (ApplicationDbCont
文章引用自NPoco官方Wiki,地址:https://github.com/schotime/NPoco/wiki,因公司网络不稳定,有时无法访问,特将其摘抄. Home Adam Schroder edited this page on 1 Jul 2016 · 49 revisions Welcome to the NPoco wiki! NPoco is a fork of PetaPoco with a handful of extra features. Getting Star
现在 java 支持 linq 啦.比原生 stream api 更好用,功能更强大.现已发布 version 1.0.1 地址: https://github.com/timandy/linq. API of IEnumerable where select selectMany take takeWhile skip skipWhile join groupJoin orderBy orderByDescending groupBy concat zip distinct union int
比较常用的查询方式linq to entity,这里先看一种写法: var query = (from d in testContext.Set<DepartPerson>() //查询和sql很像,不过这里注意,查询多条件不是and == && == && == select new Dep_Person { Name = p.Name, ID = p.ID }).ToList() 当然还有另外一种写法,改用lambda表达式查询: var personIDL