1、查询出list中所有女生并且年龄小于18，并按降序排列
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1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 public class Linq 5 { 6 public static void Main() 7 { 8 List<People> list = new List<People>(); 9 list.Add(new People(){Name="王艳",Age=10,Sex="女"}); 10 list.Add(new People(){Name="王晓华",Age=12,Sex="女"}); 11 list.Add(new People(){Name="张三",Age=15,Sex="男"}); 12 list.Add(new People(){Name="李四",Age=18,Sex="男"}); 13 list.Add(new People(){Name="赵云",Age=21,Sex="男"}); 14 list.Add(new People(){Name="何艳",Age=22,Sex="女"}); 15 list.Add(new People(){Name="周华",Age=20,Sex="女"}); 16 17 //查询出list中所有女生并且年龄小于18，并按降序排列 18 var result = list.Where(p=>p.Age<18 && p.Sex=="女").OrderByDescending(p=>p.Age); 19 foreach(People pp in result) 20 { 21 Console.WriteLine(pp.Name+" "+pp.Age+" "+pp.Sex); 22 } 23 } 24 } 25 public class People 26 { 27 public string Name 28 {get;set;} 29 public int Age 30 {get;set;}
2、查询出list中名字为“王”开头，并且长度为3的学生
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1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 public class Linq 5 { 6 public static void Main() 7 { 8 List<People> list = new List<People>(); 9 list.Add(new People(){Name="王艳",Age=10,Sex="女"}); 10 list.Add(new People(){Name="王晓华",Age=12,Sex="女"}); 11 list.Add(new People(){Name="张三",Age=15,Sex="男"}); 12 list.Add(new People(){Name="李四",Age=18,Sex="男"}); 13 list.Add(new People(){Name="赵云",Age=21,Sex="男"}); 14 list.Add(new People(){Name="何艳",Age=22,Sex="女"}); 15 list.Add(new People(){Name="周华",Age=20,Sex="女"}); 16 //查询出list中名字为“王”开头，并且长度为3的学生 17 var result1 = from p in list 18 where p.Name.Length==3 && 19 p.Name.StartsWith("王") 20 select p; 21 foreach(People pp in result1) 22 { 23 Console.WriteLine(pp.Name+" "+pp.Age+" "+pp.Sex); 24 } 25 } 26 } 27 public class People 28 { 29 public string Name 30 {get;set;} 31 public int Age 32 {get;set;}
