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

#Program.cs

using System;
using System.Collections.Generic;

namespace BT1523
{
    delegate void OnAddressPrint();//anonymous method

    class Program
    {
        static List<Parent> parentList;
        static List<Student> studentList;

        static event OnAddressPrint EventAddressPrint;//gia lap event

        static void Main(string[] args)
        {
            parentList = new List<Parent>();
            studentList = new List<Student>();

            int choose;

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

                switch(choose)
                {
                    case 1:
                        InputParent();
                        break;
                    case 2:
                        InputStudent();
                        break;
                    case 3:
                        FindStudent();
                        break;
                    case 4:
                        FindParent();
                        break;
                    case 5:
                        TestDelegate();
                        break;
                    case 6:
                        Console.WriteLine("Thoat!!!");
                        break;
                    default:
                        Console.WriteLine("Nhap sai!!!");
                        break;
                }
            } while (choose != 6);
        }

        private static void TestDelegate()
        {
            //Delegate & Event
            EventAddressPrint = ShowStudentInfo;
            EventAddressPrint();

            //Su dung dung ban chat Delegate & Event
            //Delegate => su dung tao anonymous method
            //Event => gia lap event.
            OnAddressPrint print = () =>
            {
                Console.WriteLine("Nhap dia chi can tim: ");
                string address = Console.ReadLine();

                foreach (Student std in studentList)
                {
                    if (std.Address == address)
                    {
                        std.Display();
                    }
                }
            };
            EventAddressPrint = print;
            EventAddressPrint();
        }

        static void ShowStudentInfo()
        {
            Console.WriteLine("Nhap dia chi can tim: ");
            string address = Console.ReadLine();

            foreach(Student std in studentList)
            {
                if(std.Address == address)
                {
                    std.Display();
                }
            }
        }

        private static void FindParent()
        {
            Console.WriteLine("Nhap ten sinh vien can tra cuu: ");
            string studentName = Console.ReadLine();
            string parentNo = null;

            foreach (Student std in studentList)
            {
                if (std.Fullname == studentName)
                {
                    parentNo = std.ParentNo;
                    break;
                }
            }

            if (parentNo != null)
            {
                Console.WriteLine("Phu huynh can tim: ");
                foreach (Parent parent in parentList)
                {
                    if (parent.ParentNo == parentNo)
                    {
                        parent.Display();
                        break;
                    }
                }
            }
            else
            {
                Console.WriteLine("Khong tim thay thong tin sinh vien");
            }
        }

        private static void FindStudent()
        {
            Console.WriteLine("Nhap ten phu huynh can tra cuu: ");
            string parentName = Console.ReadLine();
            string parentNo = null;

            foreach(Parent parent in parentList)
            {
                if(parent.Fullname == parentName)
                {
                    parentNo = parent.ParentNo;
                    break;
                }
            }

            if(parentNo != null) {
                Console.WriteLine("Danh sach sinh vien can tim: ");
                foreach(Student std in studentList)
                {
                    if(std.ParentNo == parentNo)
                    {
                        std.Display();
                    }
                }
            } else
            {
                Console.WriteLine("Khong thay phu huynh co ten {0}", parentName);
            }
        }

        private static void InputStudent()
        {
            Console.WriteLine("Nhap so sinh vien can them N = ");
            int N = int.Parse(Console.ReadLine());
            for (int i = 0; i < N; i++)
            {
                Student student = new Student();
                student.Input();

                studentList.Add(student);
            }
        }

        private static void InputParent()
        {
            Console.WriteLine("Nhap so phu huynh can them N = ");
            int N = int.Parse(Console.ReadLine());

            for(int i=0;i<N;i++)
            {
                Parent parent = new Parent();
                parent.Input();

                parentList.Add(parent);
            }
        }

        static void ShowMenu()
        {
            Console.WriteLine("1. Nhap N phu huynh");
            Console.WriteLine("2. Nhap M sinh vien");
            Console.WriteLine("3. Tra cuu phu huynh theo sinh sinh");
            Console.WriteLine("4. Tra cuu sinh vien theo phu huynh");
            Console.WriteLine("5. Delegate & Event");
            Console.WriteLine("6. Thoat");
            Console.WriteLine("Chon: ");
        }
    }
}

#Parent.cs

using System;
namespace BT1523
{
    public class Parent
    {
        public string Fullname { get; set; }
        public string Address { get; set; }
        public string Phone { get; set; }
        public string ParentNo { get; set; }

        public Parent()
        {
        }

        public void Input()
        {
            Console.WriteLine("Nhap ten: ");
            Fullname = Console.ReadLine();

            Console.WriteLine("Nhap dia chi: ");
            Address = Console.ReadLine();

            Console.WriteLine("Nhap SDT: ");
            Phone = Console.ReadLine();

            Console.WriteLine("Nhap ma phu huynh: ");
            ParentNo = Console.ReadLine();
        }

        public void Display()
        {
            Console.WriteLine("Ten: {0}, dia chi: {1}, sdt: {2}, ma phu huynh: {3}",
                Fullname, Address, Phone, ParentNo);
        }
    }
}

#Student.cs

using System;
namespace BT1523
{
    public class Student
    {
        public string Fullname { get; set; }
        public int Age { get; set; }
        public string RollNo { get; set; }
        public string Address { get; set; }
        public string Email { get; set; }
        public string Phone { get; set; }
        public string ParentNo { get; set; }

        public Student()
        {
        }

        public void Input()
        {
            Console.WriteLine("Nhap ten: ");
            Fullname = Console.ReadLine();

            Console.WriteLine("Nhap dia chi: ");
            Address = Console.ReadLine();

            Console.WriteLine("Nhap SDT: ");
            Phone = Console.ReadLine();

            Console.WriteLine("Nhap tuoi: ");
            Age = int.Parse(Console.ReadLine());

            Console.WriteLine("Nhap msv: ");
            RollNo = Console.ReadLine();

            Console.WriteLine("Nhap email: ");
            Email = Console.ReadLine();

            Console.WriteLine("Nhap ma phu huynh: ");
            ParentNo = Console.ReadLine();
        }

        public void Display()
        {
            Console.WriteLine("Ten: {0}, dia chi: {1}, sdt: {2}, ma phu huynh: {3}, email: {4}, msv: {5}, tuoi: {6}",
                Fullname, Address, Phone, ParentNo, Email, RollNo, Age);
        }
    }
}