使用 LINQ 打印姓名以“S”开头且年龄大于 23 岁的员工的 C# 程序
LINQ 被称为语言集成查询，它是在年引入的。NET 3.5。它赋予了。NET 语言生成查询以从数据源检索数据。它消除了编程语言和数据库之间的不匹配，并且无论使用哪种类型的数据源，用于创建查询的语法都是相同的。在本文中，我们将学习如何使用 LINQ 打印姓名以“S”开头且年龄大于 23 岁的员工的详细信息。
示例:
Input : List of Employees:
{{id = 101, name = "Sravan", age = 32},
{id = 102, name = "deepu", age = 15},
{id = 103, name = "manoja", age = 13},
{id = 104, name = "Sathwik", age = 12},
{id = 105, name = "Saran", age = 25}}
Output : {{id = 105, name = "sravan", age = 32},
{id = 105, name = "Saran", age = 25}}
Input : List of Employees:
{{id = 102, name = "deepu", age = 15},
{id = 103, name = "manoja", age = 13}}
Output : No Output
进场:
要查找姓名以“S”开头且年龄大于 23 岁的员工列表，请执行以下步骤:
- 创建包含四个变量(身份证、姓名、部门和年龄)的员工列表。
- 使用 where 子句循环查看员工详细信息，并通过选择员工姓名以“S”开头且年龄大于 23 岁来获取员工详细信息。所以我们写电磁脉冲。名称[0] == 'S' && emp。年龄> 23 岁。
- 现在调用 ToString()方法。
- 显示员工详细信息。
示例:
C
// C# program to display the details of
// those employees whose name is starts
// with S and their age is greater than 23
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
class Employee{
// Declare four variables - id, age, department, and name
int id;
int age;
string department;
string name;
// Get the to string method that returns
// id, age, department, and name
public override string ToString()
{
return id + " " + name + " " + age + " " + department;
}
// Driver code
static void Main(string[] args)
{
// Declare a list variable
List<Employee> emp = new List<Employee>()
{
// Create 5 Employee details
new Employee{ id = 101, name = "Sravan",
age = 32, department = "HR" },
new Employee{ id = 102, name = "deepu",
age = 15, department = "Development" },
new Employee{ id = 103, name = "manoja",
age = 13, department = "Development" },
new Employee{ id = 104, name = "Sathwik",
age = 12, department = "HR" },
new Employee{ id = 105, name = "Saran",
age = 25, department = "Designing" }
};
// Iterate the Employee by selecting Employee
// name starts with S and age is greater than 23
IEnumerable<Employee> result = from e in emp
where e.name[0] == 'S' && e.age > 23
select e;
// Display employee details
Console.WriteLine("ID Name Age Department");
Console.WriteLine("+++++++++++++++++++++++++");
foreach (Employee x in result)
{
// Call the to string method
Console.WriteLine(x.ToString());
}
}
}
输出:
ID Name Age Department
+++++++++++++++++++++++++
101 Sravan 32 HR
105 Saran 25 Designing
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