C# Linq 中的多重 Where 子句
使用 C# 中 Where 子句筛选集合。一个查询表达式可能包含多个 where 子句。
首先,设置一个集合 −
IList<Employee> employee = new List<Employee>() { new Employee() { EmpID = 1, EmpName = "Tom", EmpMarks = 90, Rank = 8} , new Employee() { EmpID = 2, EmpName = "Anne", EmpMarks = 60, Rank = 21 } , new Employee() { EmpID = 3, EmpName = "Jack", EmpMarks = 76, Rank = 18 } , new Employee() { EmpID = 4, EmpName = "Amy" , EmpMarks = 67, Rank = 20} , };
现在,让我们使用多个 where 子句来获取排名在 5 和 10 之间的员工。
var res = from e in employee where e.Rank > 5 where e.Rank < 10 select e;
以下是代码 −
示例
using System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { IList<Employee> employee = new List<Employee>() { new Employee() { EmpID = 1, EmpName = "Tom", EmpMarks = 90, Rank = 8} , new Employee() { EmpID = 2, EmpName = "Anne", EmpMarks = 60, Rank = 21 } , new Employee() { EmpID = 3, EmpName = "Jack", EmpMarks = 76, Rank = 18 } , new Employee() { EmpID = 4, EmpName = "Amy" , EmpMarks = 67, Rank = 20} , }; var res = from e in employee where e.Rank > 5 where e.Rank < 10 select e; foreach (var emp in res) { Console.WriteLine("Name: "+emp.EmpName); Console.WriteLine("Marks: "+emp.EmpMarks); } } } public class Employee { public int EmpID { get; set; } public string EmpName { get; set; } public int EmpMarks { get; set; } public int Rank { get; set; } }
输出
Name: Tom Marks: 90
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