LINQ |如何求给定序列的最大值？
在 LINQ，使用 Max()函数可以找到给定序列的最大元素。此方法提供给定值集的最大元素。它不支持 C# 中的查询语法，但在 VB.NET 支持。它在 C# 的可枚举和可查询类中都可用。如果集合中存在的所有元素都为 null，则返回 null。它返回任何类型的数据类型，这意味着您也可以将 Max 用于自定义类型的集合(不包含数值)，但为此，您必须实现 IComparable 接口。它可以处理可空、不可空的十进制、双精度、浮点、int 等。价值观。
例 1:
// C# program to find maximum
// value from the given array
using System;
using System.Linq;
class GFG {
// Main Method
static public void Main()
{
// Data source
int[] sequence = {20, 45, 50, 79, 90,
79, 89, 100, 567, 29};
// Display the sequence
Console.WriteLine("The sequence is:");
foreach(int s in sequence)
{
Console.WriteLine(s);
}
// Finding the maximum element
// from the given sequence
// Using Max function
int result = sequence.Max();
Console.WriteLine("Maximum Value: {0}", result);
}
}
Output:
The sequence is:
20
45
50
79
90
79
89
100
567
29
Maximum Value: 567
例 2:
// C# program to find the Maximum
// salary of the employee
using System;
using System.Linq;
using System.Collections.Generic;
// Employee details
public class Employee {
public int emp_id
{
get;
set;
}
public string emp_name
{
get;
set;
}
public string emp_gender
{
get;
set;
}
public string emp_hire_date
{
get;
set;
}
public int emp_salary
{
get;
set;
}
}
class GFG {
// Main method
static public void Main()
{
List<Employee> emp = new List<Employee>() {
new Employee() { emp_id = 209, emp_name = "Anjita", emp_gender = "Female", emp_hire_date = "12/3/2017", emp_salary = 20000 },
new Employee() { emp_id = 210, emp_name = "Soniya", emp_gender = "Female", emp_hire_date = "22/4/2018", emp_salary = 30000 },
new Employee() { emp_id = 211, emp_name = "Rohit", emp_gender = "Male", emp_hire_date = "3/5/2016", emp_salary = 40000 },
new Employee() { emp_id = 212, emp_name = "Supriya", emp_gender = "Female", emp_hire_date = "4/8/2017", emp_salary = 40000 },
new Employee() { emp_id = 213, emp_name = "Anil", emp_gender = "Male", emp_hire_date = "12/1/2016", emp_salary = 40000 },
new Employee() { emp_id = 214, emp_name = "Anju", emp_gender = "Female", emp_hire_date = "17/6/2015", emp_salary = 50000 },
};
// Find the Maximum salary of the
// employee Using Max() method
var res = emp.Max(a => a.emp_salary);
Console.WriteLine("Maximum Salary of the Employee: {0}", res);
}
}
Output:
Maximum Salary of the Employee: 50000
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