101个Linq的例子

【101个Linq的例子】的更多相关文章

Where - Simple 1 筛选出数值中大于5的元素 public void Linq1() { int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 }; var lowNums = from n in numbers where n < 5 select n; Console.WriteLine("Numbers < 5:"); foreach (var x in lowNums) { Console.WriteLine(x…

101个linq例子

FirstOrDefault - Simple public void Linq61() { int[] numbers = { }; int firstNumOrDefault = numbers.FirstOrDefault(); Console.WriteLine(firstNumOrDefault); } Result 0 FirstOrDefault - Condition public void Linq62() { List<Product> products = GetProd…

101个Linq例子(40-60)

GroupBy - Simple 2 public void Linq41() { string[] words = { "blueberry", "chimpanzee", "abacus", "banana", "apple", "cheese" }; var wordGroups = from w in words group w by w[] into g select new…

101个LINQ示例，包含几乎全部操作

Restriction Operators Where - Simple public void Linq1() { , , , , , , , , , }; var lowNums = from n in numbers select n; Console.WriteLine("Numbers < 5:"); foreach (var x in lowNums) { Console.WriteLine(x); } } Where - Simple public void Lin…

Linq查询

//Linq查询 List<A1> a1 = new List<A1>(); a1.Add(, Name = , Gender = true }); a1.Add(, Name = , Gender = true }); a1.Add(, Name = , Gender = false }); a1.Add(, Name = , Gender = false }); List<DogToy> a2 = new List<DogToy>(); a2.Add(,…

linq简介

语言集成查询(Language INtegrated Query,LINQ)是一项微软技术,新增一种自然查询的SQL语法到.NET Framework的编程语言中,可支持Visual Basic .NET以及C#语言. 从技术角度而言,LINQ定义了大约40个查询操作符,如select.from.in.where以及order by(C#中).使用这些操作符可以编写查询语句.不过,这些查询还可以基于很多类型的数据,每个数据类型都需要一个单独的LINQ类型. 经过了20年,面向对象编程技术( ob…