Notes

using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.Linq;

[ApiController]
[Route("[controller]")]
public class StudentController : ControllerBase
{
private static List<Student> students10 = new List<Student>
{
new Student { Id = 1, Name = "Student1", Assignment = "Math", Attendance = "90%", Contact = "1234567890", Class = 10 },
// Add more students as needed
};

private static List<Student> students11 = new List<Student>
{
new Student { Id = 1, Name = "Student11", Assignment = "Physics", Attendance = "85%", Contact = "9876543210", Class = 11 },
// Add more students as needed
};

private static List<Student> students12 = new List<Student>
{
new Student { Id = 1, Name = "Student21", Assignment = "Chemistry", Attendance = "92%", Contact = "5555555555", Class = 12 },
// Add more students as needed
};

[HttpGet("10")]
public ActionResult<IEnumerable<Student>> GetStudents10()
{
return Ok(students10);
}

[HttpGet("11")]
public ActionResult<IEnumerable<Student>> GetStudents11()
{
return Ok(students11);
}

[HttpGet("12")]
public ActionResult<IEnumerable<Student>> GetStudents12()
{
return Ok(students12);
}

[HttpPost("10/add")]
public ActionResult<Student> AddStudent10([FromBody] Student student)
{
student.Id = GenerateStudentId(students10);
students10.Add(student);
return CreatedAtAction(nameof(GetStudents10), students10);
}

[HttpPost("11/add")]
public ActionResult<Student> AddStudent11([FromBody] Student student)
{
student.Id = GenerateStudentId(students11);
students11.Add(student);
return CreatedAtAction(nameof(GetStudents11), students11);
}

[HttpPost("12/add")]
public ActionResult<Student> AddStudent12([FromBody] Student student)
{
student.Id = GenerateStudentId(students12);
students12.Add(student);
return CreatedAtAction(nameof(GetStudents12), students12);
}

[HttpPut("{classNumber}/update/{id}")]
public IActionResult UpdateStudent(int classNumber, int id, [FromBody] Student updatedStudent)
{
List<Student> students = GetStudentsByClass(classNumber);

Student existingStudent = students.FirstOrDefault(s => s.Id == id);

if (existingStudent == null)
return NotFound("Student not found");

existingStudent.Name = updatedStudent.Name;
existingStudent.Assignment = updatedStudent.Assignment;
existingStudent.Attendance = updatedStudent.Attendance;
existingStudent.Contact = updatedStudent.Contact;

return NoContent();
}

[HttpDelete("{classNumber}/delete/{id}")]
public IActionResult DeleteStudent(int classNumber, int id)
{
List<Student> students = GetStudentsByClass(classNumber);

Student existingStudent = students.FirstOrDefault(s => s.Id == id);

if (existingStudent == null)
return NotFound("Student not found");

students.Remove(existingStudent);
return NoContent();
}

private int GenerateStudentId(List<Student> students)
{
// Generate a unique student ID (example: increment the last student ID)
return students.Count + 1;
}

private List<Student> GetStudentsByClass(int classNumber)
{
switch (classNumber)
{
case 10:
return students10;
case 11:
return students11;
case 12:
return students12;
default:
return new List<Student>();
}
}
}