使用 LINQ 打印 ID 大于 101 的员工的 C# 程序

LINQ 被称为语言集成查询，它是在 .NET 3.5 中引入的。它使.NET语言能够生成查询以从数据源中检索数据。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，我们将使用 LINQ 显示 ID 大于 101 的员工详细信息。

例子：

Input:
List of employees:
      {{emp_id = 101, emp_name = "bobby",  emp_age = 12},
       {emp_id = 102, emp_name = "deepu",  emp_age = 15},
       {emp_id = 103, emp_name = "manoja", emp_age = 13},
       {emp_id = 104, emp_name = "saroja", emp_age = 14},
       {emp_id = 105, emp_name = "sravan", emp_age = 15},
       {emp_id = 106, emp_name = "navya",  emp_age = 12},
       {emp_id = 107, emp_name = "majnu",  emp_age = 12},
       {emp_id = 108, emp_name = "vishnu", emp_age = 12}}
Output:
      {{emp_id = 102, emp_name = "deepu",  emp_age = 15},
       {emp_id = 103, emp_name = "manoja", emp_age = 13},
       {emp_id = 104, emp_name = "saroja", emp_age = 14},
       {emp_id = 105, emp_name = "sravan", emp_age = 15},
       {emp_id = 106, emp_name = "navya",  emp_age = 12},
       {emp_id = 107, emp_name = "majnu",  emp_age = 12},
       {emp_id = 108, emp_name = "vishnu", emp_age = 12}}
      
Input:
List of employees:
      {{emp_id = 101, emp_name = "bobby",  emp_age = 12},
       {emp_id = 102, emp_name = "deepu",  emp_age = 15},
       {emp_id = 103, emp_name = "manoja", emp_age = 13}}
Output:
      {{emp_id = 102, emp_name = "deepu",  emp_age = 15},
       {emp_id = 103, emp_name = "manoja", emp_age = 13}}

方法：

To display the employee details whose ID greater than 101 follow the following approach:

Create a list of employees with three variables (Id, name and age)
Iterate through the employee details by using where function and get the employee details by choosing employee id greater than 101
Select the details which are greater than 101
Call the ToString() method
Display the employee details

编程需要懂一点英语

例子：

C#

// C# program to display the details of the employee
// whose ID greater than 101 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
  
public class Employee{
  
// Declare 3 variables - id,age and name
int emp_id; 
int emp_age;
string emp_name;
  
// Get the to string method that returns
// id , name and age
public override string ToString()
{
    return emp_id + " " + emp_name + " " + emp_age;
}
  
// Driver code
static void Main(string[] args)
{
      
    // Declare a list variable 
    List emp1 = new List()
    {
          
        // Create 8 employee details
        new Employee{ emp_id = 101, emp_name = "bobby", emp_age = 12},
        new Employee{ emp_id = 102, emp_name = "deepu", emp_age = 15},
        new Employee{ emp_id = 103, emp_name = "manoja", emp_age = 13},
        new Employee{ emp_id = 104, emp_name = "saroja", emp_age = 14},
        new Employee{ emp_id = 105, emp_name = "sravan", emp_age = 15},
        new Employee{ emp_id = 106, emp_name = "navya", emp_age = 12},
        new Employee{ emp_id = 107, emp_name = "majnu", emp_age = 12},
        new Employee{ emp_id = 108, emp_name = "vishnu", emp_age = 12},
    };
      
    // Iterate the Employee by selecting Employee
    // id greater than 101
    // Using where clause
    IEnumerable Query = 
    from employee in emp1 where employee.emp_id > 101 select employee;
     
    // Display employee details
    Console.WriteLine("ID  Name  Age");
    Console.WriteLine("+++++++++++++");
    foreach (Employee e in Query)
    {
          
        // Call the to string method
        Console.WriteLine(e.ToString());
    }
}
}

输出：

ID  Name  Age
+++++++++++++
102 deepu 15
103 manoja 13
104 saroja 14
105 sravan 15
106 navya 12
107 majnu 12
108 vishnu 12