使用 LINQ 打印姓名以“S”开头的员工的 C# 程序
原文:https://www . geeksforgeeks . org/c-sharp-program-to-print-the-employees-s-use-linq/
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 打印姓名以字母“S”开头的员工的详细信息。所以为了完成我们的任务，我们使用 Where()方法。此方法基于谓词过滤给定的值序列或数组，要使用此方法，您需要添加 System。临朐与系统。集合。程序中的通用命名空间。
语法:
其中 (IEnumerable ，Func )
示例:
Input : List of Employees:
{{id = 101, name = "Sravan", age = 12},
{id = 102, name = "deepu", age = 15},
{id = 103, name = "manoja", age = 13},
{id = 104, name = "Sathwik", age = 12},
{id = 105, name = "Saran", age = 15}}
Output : {{id = 105, name = "sravan", age = 15},
{id = 104, name = "Sathwik",age = 12},
{id = 105, name = "Saran", age = 15}}
Input : List of Employees:
{{id = 102, name = "deepu", age = 15},
{id = 103, name = "manoja", age = 13}}
Output : No Output
进场:
要查找姓名以字母“S”开头的员工列表，请执行以下步骤:
- 创建包含三个变量(身份证、姓名、部门和工资)的员工列表。
- 通过使用 Where()函数迭代员工详细信息，并通过使用 s => s.name[0] == 'S '选择姓名以' S '开头的员工来获取员工详细信息。
- 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 starts with character "S"
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
class Employee{
// Declare 4 variables - id, name,
// department, and salary
int id;
int salary;
string name;
string department;
// Get the to string method that returns
// id, name, department, and salary
public override string ToString()
{
return id + " " + name + " " +
salary + " " + 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",
salary = 12000, department = "HR" },
new Employee{ id = 102, name = "deepu",
salary = 15000, department = "Development" },
new Employee{ id = 103, name = "manoja",
salary = 13000, department = "HR" },
new Employee{ id = 104, name = "Sathwik",
salary = 12000, department = "Designing" },
new Employee{ id = 105, name = "Saran",
salary = 15000, department = "Development" }
};
// Iterate the Employee by selecting Employee
// name starts with S
IEnumerable<Employee> result = emp.Where(x => x.name[0] == 'S');
// Display employee details
Console.WriteLine("ID Name Salary Department");
Console.WriteLine("++++++++++++++++++++++++++++");
foreach (Employee e in result)
{
// Call the to string method
Console.WriteLine(e.ToString());
}
}
}
输出:
ID Name Salary Department
++++++++++++++++++++++++++++
101 Sravan 12000 HR
104 Sathwik 12000 Designing
105 Saran 15000 Development
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