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C linq orDErBy

LINQ 按多个字段排序(orderby、thenby、Take) orderby 子句解析为 OrderBy()方法,orderby descending 子句解析为OrderBy Descending()方法: var racers = Formula1.GetChampions(). Where(r = > r.Country == "Brazil"). OrderByDescending(...

利用扩展方法OrderByDescending对数组进行降序排序 using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication4{ class Program { static void Main(string[] args) { int[] a = { 1, 2...

多个字段就是在原来的基础上再次排序,参考: var pn = (from m in (from m in blist orderby m.score descending select m) orderby m.year descending select m);

private static IEnumerable Sort(IEnumerable source, string propertyName, bool asc) { Func func = s => s.GetType().GetProperty(propertyName).GetValue(s, null); if (asc) return source.OrderBy(func); return source.OrderByDescendin...

最佳实践是查询树较简单可以不用OrderBy。 什么叫简单,单聚集列输出。当然还有一些特例,比如全复合主键表。这都是特列。何必为几个特列妨碍99%的情况。 以下是Linq常用的形式。 1 ColEntities = t.OrderBy(v => v.ID).Skip((pageSkip - 1) * m...

enumerable.OrderBy(a=>a.Class).ThenByDescending(a=>a.Name).ThenBy(a=>a.Age)

布尔只有两种状态,所以直接用 OrderBy跟OrderByDescending就能正序跟倒序拍,没必要多计算 .OrderBy(o => o.字段); .OrderByDescending(o => o.字段); 比如 var p = new Dictionary(); p.Add(1, false); p.Add(2, false); p.Add(3, true); p.Ad...

db.S.Where(q=>q.TypeID==1).OrderByDesending(q=>q.ID).Take(1);

string[] names = { "Hello", "Good", "YES", "HOME", "Diyo" }; string[] names_asc = names.OrderBy(t => t).ToArray(); string[] names_desc = names.OrderByDescending(t => t).ToArray();

var query=from p in DATA Oderby p.bool select p;

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