Viết chương trình quản lý sinh viên + delegate & event trong C# - Lập Trình C# - Lập Trình C Sharp

#Parent.cs

using System;
namespace Lession8
{
    public class Parent
    {
        public string MaPH { get; set; }
        public string Fullname { get; set; }

        public Parent()
        {
        }

        public void Input() {
            Console.WriteLine("Nhap Ma PH: ");
            MaPH = Console.ReadLine();

            Console.WriteLine("Nhap Ten: ");
            Fullname = Console.ReadLine();
        }

        public void Show() {
            Console.WriteLine("Ma PH: {0}, Ten: {1}", MaPH, Fullname);
        }
    }
}

#Parent.css

body {
}

#Program.cs

using System;
using System.Collections.Generic;

namespace Lession8
{
    public delegate void OnAddressPrint(List<Student> students);
    class Program
    {
        static event OnAddressPrint EventAddressPrint;

        static void Main(string[] args)
        {
            List<Parent> parents = new List<Parent>();
            List<Student> students = new List<Student>();
            int choose;

            do
            {
                ShowMenu();
                choose = int.Parse(Console.ReadLine());

                switch (choose)
                {
                    case 1:
                        Console.WriteLine("Nhap so phu huynh can them: ");
                        int n = int.Parse(Console.ReadLine());
                        for (int i = 0; i < n; i++) {
                            Parent parent = new Parent();
                            parent.Input();

                            parents.Add(parent);
                        }
                        break;
                    case 2:
                        Console.WriteLine("Nhap so sinh vien can them: ");
                        int m = int.Parse(Console.ReadLine());
                        for (int i = 0; i < m; i++)
                        {
                            Student std = new Student();
                            std.Input(parents);

                            students.Add(std);
                        }
                        break;
                    case 3:
                        Console.WriteLine("Nhap Ma PH: ");
                        string maPH = Console.ReadLine();

                        Console.WriteLine("Danh sach sinh vien duoc tham chieu boi phu huynh: ");
                        foreach(Student std in students) {
                            if(std.MaPH.Equals(maPH)) {
                                std.Show();
                            }
                        }
                        break;
                    case 4:
                        Console.WriteLine("Nhap Ma SV: ");
                        string rollno = Console.ReadLine();

                        Console.WriteLine("Danh sach sinh vien duoc tham chieu boi phu huynh: ");
                        foreach (Student std in students)
                        {
                            if (std.RollNo.Equals(rollno))
                            {
                                foreach(Parent p in parents) {
                                    if(p.MaPH.Equals(std.MaPH)) {
                                        p.Show();
                                        break;
                                    }
                                }

                                break;
                            }
                        }
                        break;
                    case 5:
                        EventAddressPrint = new OnAddressPrint(ShowStudentByAddress);

                        EventAddressPrint(students);
                        break;
                    case 6:
                        Console.WriteLine("Exit!!!");
                        break;
                    default:
                        Console.WriteLine("Nhap lai!!!");
                        break;
                }
            } while (choose != 6);
            
            Console.WriteLine("Hello World!");
        }

        static void ShowStudentByAddress(List<Student> students) {
            Console.WriteLine("Nhap dia chi: ");
            string address = Console.ReadLine();

            Console.WriteLine("Thong tin sinh vien tim kiem theo dia chi: ");
            foreach(Student std in students) {
                if(std.Address.Contains(address)) {
                    std.Show();
                }
            }
        }

        static void ShowMenu() {
            Console.WriteLine("1. Nhap N Phu Huynh");
            Console.WriteLine("2. Nhap N Sinh Vien");
            Console.WriteLine("3. Tim Kiem SV Theo PH");
            Console.WriteLine("4. Tim Kiem Thong Tin PH theo SV");
            Console.WriteLine("5. Event & Delegate");
            Console.WriteLine("6. THoat");
            Console.WriteLine("Choose: ");
        }
    }
}

#Student.cs

using System;
using System.Collections.Generic;

namespace Lession8
{
    public class Student
    {
        public string RollNo { get; set; }
        public string Fullname { get; set; }
        public string MaPH { get; set; }
        public string Address { get; set; }

        public Student()
        {
        }

        public void Input(List<Parent> parents) {
            Console.WriteLine("Nhap Ma SV: ");
            RollNo = Console.ReadLine();

            Console.WriteLine("Nhap Ten: ");
            Fullname = Console.ReadLine();

            Console.WriteLine("Nhap Dia Chi: ");
            Address = Console.ReadLine();

            foreach(Parent parent in parents) {
                parent.Show();
            }
            Console.WriteLine("Nhap Ma PH: ");
            for (; ;) {
                MaPH = Console.ReadLine();
                bool isFind = false;
                foreach(Parent p in parents) {
                    if(p.MaPH.Equals(MaPH)) {
                        isFind = true;
                        break;
                    }
                }

                if(isFind) {
                    break;
                }
                Console.WriteLine("Nhap Lai: ");
            }
        }

        public void Show() {
            Console.WriteLine("MaSV: {0}, Ten: {1}, MaPH: {2}", RollNo, Fullname, MaPH);
        }
    }
}