Viết chương trình quản lý thông tin sinh viên.

2021-05-26 10:21:24

using System;
using System.Collections.Generic;
using System.Text;

namespace Lesson6.Deligate.Event.StudentManager
{
    class Student
    {
        public string Roolno { get; set; }
        public int Age { get; set; }
        public string Name { get; set; }
        public string Address { get; set; }
        public string Email { get; set; }
        public string Phone { get; set; }

        public string ParentRoolno { get; set; }

        public Student() { }

        public Student(string Name, int Age, string Roolno, string Address, string Email, string Phone, string ParentRoolno)
        {
            this.Name = Name;
            this.Roolno = Roolno;
            this.Address = Address;
            this.Email = Email;
            this.Phone = Phone;
            this.ParentRoolno = ParentRoolno;
            this.Age = Age;
        }

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

            Console.WriteLine("Nhap tuoi sinh vien:");
            Age = Int32.Parse(Console.ReadLine());

            Console.WriteLine("Nhap ma sinh vien:");
            Roolno = Console.ReadLine();

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

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

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

            Console.WriteLine("Nhap ma phu huynh quan ly:");
            ParentRoolno = Console.ReadLine();

        }

        public void Display()
        {
            Console.WriteLine("Ten SV: {0}, Tuoi SV: {1}, Ma SV: {2}, Dia chi SV: {3}, Email SV: {4}, SDT SV: {5}", Name, Age, Roolno, Address, Email, Phone);
        }
    }
}

2021-05-26 10:21:06

using System;
using System.Collections.Generic;


namespace Lesson6.Deligate.Event.StudentManager
{
    public delegate void OnAddressPrint(string Address);
    class Program
    {
        static List<Student> StudentList = new List<Student>();
        static List<Parent> ParentList = new List<Parent>();
        static event OnAddressPrint CalEventOAP = null;
        static void Main(string[] args)
        {
            int option;
            do
            {
                Menu();
            option = Int32.Parse(Console.ReadLine());
                switch (option)
                {
                    case 1:
                        InputParentInformation();
                        break;

                    case 2:
                        InputStudentInformationn();
                        break;

                    case 3:
                        FindStudentBaseOnParentName();
                        break;


                    case 4:
                        FindParentBaseOnStudentRoolno();
                        break;

                    case 5:
                        Console.WriteLine("Nhap dia chi sinh vien");
                        string FindAddress = Console.ReadLine();

                        //OnAddressPrint OAP = FindAllStudentsBaseOnInputAddress;
                        //OAP(FindAddress);
                        CalEventOAP = FindAllStudentsBaseOnInputAddress;
                        CalEventOAP(FindAddress);
                        break;

                    case 6:
                       Console.WriteLine("Exit...Bye...! ");
                        break;
                }

            } while (option != 6);
            
        }

        private static void FindAllStudentsBaseOnInputAddress(string FindAddress)
        {
            foreach (Student student in StudentList)
            {
                if (student.Address == FindAddress)
                {
                    student.Display();
                }
            }
        }

        private static void FindParentBaseOnStudentRoolno()
        {
            Console.WriteLine("Nhap ma hoc sinh:");
            string FindRoolno = Console.ReadLine();

            foreach (Student student in StudentList)
            {
                if (student.Roolno == FindRoolno)
                {
                    foreach (Parent parent in ParentList)
                    {
                        if (parent.Roolno == student.ParentRoolno)
                        {
                            parent.Display();
                        }
                    }
                }
            }
        }

        private static void FindStudentBaseOnParentName()
        {
            Console.WriteLine("Nhap ten phu huynh:");
            string FindName = Console.ReadLine();
            Console.WriteLine("Danh dach hoc sinh tim duoc nhu sau:");
            foreach (Parent parent in ParentList)
            {
                if(parent.Name == FindName)
                {
                    foreach( Student student in StudentList)
                    {
                        if (parent.Roolno == student.ParentRoolno)
                        {
                            student.Display();
                        }
                    }
                }
            }
        }

        private static void InputStudentInformationn()
        {
            Console.WriteLine("Nhap so luong hoc sinh can them thong tin");
            int N = Int32.Parse(Console.ReadLine());
                for(int i = 0; i < N; i++)
            {
                Student student = new Student();
                student.Input();
                StudentList.Add(student);
            }
        }

        private static void InputParentInformation()
        {
            Console.WriteLine("Nhap so luong phu huynh can them thong tin");
            int M = Int32.Parse(Console.ReadLine());
            for (int i = 0; i < M; i++)
            {
                Parent parent = new Parent();
                parent.Input();
                ParentList.Add(parent);
            }
        }

        static void Menu()
        {
            Console.WriteLine("1.Input parent information");
            Console.WriteLine("2.Input student information");
            Console.WriteLine("3.Find student base on parent name");
            Console.WriteLine("4.Find parent base on student roolno");
            Console.WriteLine("5.Find all students base on input address");
            Console.WriteLine("6.Exit Program");
            Console.WriteLine("Input your option: ");
        }
    }
}

2021-05-26 09:49:06

using System;
using System.Collections.Generic;

namespace thongtinsinhvien
   
{
    public delegate String OnAddressPrint(String diachi);
    class Program
    {
        static event OnAddressPrint EventAddressPrint = null;

        public static List<Sinvien> svlist = new List<Sinvien>();
        public static List<Phuhuynh> phlist = new List<Phuhuynh>();
        static void Main(string[] args)
        {
            int lc;
            do {
                menu();
                Console.WriteLine("Nhap su lua chon");
                lc = Int32.Parse(Console.ReadLine());
                switch (lc) {
                    case 1:
                        int m;
                        Console.WriteLine("Nhap so luong phu huynh can them: ");
                        m = Int32.Parse(Console.ReadLine());
                        for (int i = 0; i < m; i++)
                        {
                            Phuhuynh ph = new Phuhuynh();
                            ph.Nhap();
                            phlist.Add(ph);
                        }
                        break;
                    case 2:
                        int n;
                        Console.WriteLine("Nhap so luong sinh vien can them: ");
                        n = Int32.Parse(Console.ReadLine());
                        for (int i = 0; i < n; i++)
                        {
                            Sinvien sv = new Sinvien();
                            sv.nhap();
                            svlist.Add(sv);
                        }
                        break;
                    case 3:
                        Console.WriteLine("Nhap ten phu huynh");
                        String ten = Console.ReadLine();
                        String t = Timten(ten);
                        foreach (Sinvien sv in svlist) {
                            if (sv.Sv_maphuhuynh == t) {
                                sv.hienthi();
                            }
                        }
                        break;
                    case 4:
                        Console.WriteLine("Nhap ma sinh vien: ");
                        String masv = Console.ReadLine();
                        String maph = Timph(masv);
                        foreach (Phuhuynh ph in phlist)
                        {
                            if (ph.Ph_ma == maph)
                            {
                                ph.hienthi();
                            }
                        }
                        break;
                    case 5:
                        String diachi;
                        Console.WriteLine("Nhap dia chi");
                        diachi = Console.ReadLine();
                        List<OnAddressPrint> list = new List<OnAddressPrint>();
                        list.Add(Timdiachi);
                        foreach (OnAddressPrint o in list) {
                            o(diachi);
                        }
                        Console.WriteLine("even!!");
                        EventAddressPrint = Timdiachi;
                        EventAddressPrint(diachi);
                        break;
                }
            } while (lc > 0);
        }
        public static void menu() {
            Console.WriteLine(" 1 Nhap thong tin phu huynh: ");
            Console.WriteLine(" 2 Nhap thong tin sinh vien: ");
            Console.WriteLine(" 3 Tim sinh vien theo ma phu huynh: ");
            Console.WriteLine(" 4 Tim phu huynh theo ma sinh vien");
            Console.WriteLine(" 5 tim sinh vien theo dia chi");
        }
        public static String Timten(String ten) {
            String t = "";
            foreach (Phuhuynh ph in phlist) {
                if (ph.Ph_ten == ten) {
                    t = ph.Ph_ma;
                }
            }
            return t;
        }
        public static String Timph(String ma)
        {
            String t = "";
            foreach (Sinvien sv in svlist)
            {
                if (sv.Sv_ma == ma)
                {
                    t = sv.Sv_maphuhuynh;
                }
            }
            return t;
        }
        public static String Timdiachi(String dc) {
            String svl = "" ;
            foreach (Sinvien sv in svlist) {
                if (sv.Sv_diachi == dc)
                {
                    svl = sv.tostring();
                    sv.hienthi();
                }
            }
            return svl;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;

namespace thongtinsinhvien
{
    class Sinvien
    {
        public String Sv_ten { get; set; }
        public int Sv_tuoi { get; set; }
        public String Sv_ma { set; get; }
        public String Sv_diachi { set; get; }
        public String Sv_email { get; set; }
        public int Sv_sdt { get; set; }
        public String Sv_maphuhuynh { get; set; }

        public Sinvien() { }

        public void nhap() {
            Console.WriteLine(" Nhap ma sinh vien: ");
            Sv_ma = Console.ReadLine();
            Console.WriteLine("Nhap ten sinh vien: ");
            Sv_ten = Console.ReadLine();
            Console.WriteLine("Nhap tuoi sinh vien: ");
            Sv_tuoi = Int32.Parse(Console.ReadLine());
            Console.WriteLine("Nhap email sinh vienL: ");
            Sv_email = Console.ReadLine();
            Console.WriteLine("Nhap so dien thoai: ");
            Sv_sdt = Int32.Parse(Console.ReadLine());
            Console.WriteLine("Nhap dia chi sinh vien: ");
            Sv_diachi = Console.ReadLine();
            Console.WriteLine("Nhap ma phu huynh: ");
            Sv_maphuhuynh = Console.ReadLine();
        }
        public void hienthi() {
            Console.WriteLine("Ma sinh vien: " + Sv_ma + " , Ten sinh vien: " + Sv_ten + " , Tuoi sinh vien: " + Sv_tuoi + " , Email: " + Sv_email + " , so dien thoai: " + Sv_sdt + " , Dia chi sinh vien: " + Sv_diachi + " , ma phu huynh: " + Sv_maphuhuynh);
        }
        public String tostring() {
            return "Ma sinh vien: " + Sv_ma + " , Ten sinh vien: " + Sv_ten + " , Tuoi sinh vien: " + Sv_tuoi + " , Email: " + Sv_email + " , so dien thoai: " + Sv_sdt + " , Dia chi sinh vien: " + Sv_diachi + " , ma phu huynh: " + Sv_maphuhuynh;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;

namespace thongtinsinhvien
{
    class Phuhuynh
    {
        public String Ph_ten { get; set; }
        public String Ph_diachi { set; get; }
        public int Ph_sdt { get; set; }
        public String Ph_ma { get; set; }
    
    public Phuhuynh() { }

        public void Nhap() {
            Console.WriteLine("Nhap ma phu huynh");
            Ph_ma = Console.ReadLine();
            Console.WriteLine("Nhap ten phu huynh: ");
            Ph_ten = Console.ReadLine();
            Console.WriteLine("Nhap so dien thoai phui huynh: ");
            Ph_sdt = Int32.Parse(Console.ReadLine()) ;
            Console.WriteLine("Nhap dia chi phu huynh: ");
            Ph_diachi = Console.ReadLine();
        }
        public void hienthi() {
            Console.WriteLine("Ma phu huynh: " + Ph_ma + " , Ten phu huynh: " + Ph_ten + " , So dien thoai phu huynh: " + Ph_sdt + " , Dia chi phu huynh: " + Ph_diachi);
        }
}
}

2020-07-13 08:48:17

using System;
using System.Collections.Generic;
using System.Text;

namespace Project7
{
    class PhuHuynh
    {
        public string Ten { get; set; }
        public string Address { get; set; }
        public string Sdt { get; set; }
        public string MaPH { get; set; }

        public PhuHuynh(string ten, string address, string sdt, string maPH)
        {
            Ten = ten;
            Address = address;
            Sdt = sdt;
            MaPH = maPH;
        }
        public PhuHuynh()
        {
        }
        public void Input()
        {
            Console.WriteLine("Nhập tên: ");
            this.Ten = Console.ReadLine();
            Console.WriteLine("Nhập địa chỉ: ");
            this.Address = Console.ReadLine();
            Console.WriteLine("Nhập số điện thoại: ");
            this.Sdt = Console.ReadLine();
            Console.WriteLine("Nhập mã phụ huynh: ");
            this.MaPH = Console.ReadLine();
        }

        public void Display()
        {
            Console.WriteLine("Tên phụ huynh: " + Ten);
            Console.WriteLine("Địa chỉ: " + Address);
            Console.WriteLine("Số điện thoại: " + Sdt);
            Console.WriteLine("Mã phụ huynh: " + MaPH);
        }
    }
}
-------------------------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Text;

namespace Project7
{
    class SinhVien
    {
        public string Ten { get; set; }
        public int Tuoi { get; set; }
        public string MaSV { get; set; }
        public string Address { get; set; }
        public string Email { get; set; }
        public string Sdt { get; set; }
        public string MaPH { get; set; }

        public SinhVien(string ten, int tuoi, string maSV, string address, string email, string sdt, string maPH)
        {
            Ten = ten;
            Tuoi = tuoi;
            MaSV = maSV;
            Address = address;
            Email = email;
            Sdt = sdt;
            MaPH = maPH;
        }
        public SinhVien()
        {
        }

        public void Input()
        {
            Console.WriteLine("Nhập tên: ");
            this.Ten = Console.ReadLine();
            Console.WriteLine("Nhập tuổi: ");
            this.Tuoi = int.Parse(Console.ReadLine());
            Console.WriteLine("Nhập mã sinh viên: ");
            this.MaSV = Console.ReadLine();
            Console.WriteLine("Nhập địa chỉ: ");
            this.Address = Console.ReadLine();
            Console.WriteLine("Nhập email: ");
            this.Email = Console.ReadLine();
            Console.WriteLine("Nhập số điện thoại: ");
            this.Sdt = Console.ReadLine();
        }

        public void Display()
        {
            Console.WriteLine("Tên sinh viên: "+Ten);
            Console.WriteLine("Tuổi: " + Tuoi);
            Console.WriteLine("Mã sinh viên: "+MaSV);
            Console.WriteLine("Địa chỉ: "+Address);
            Console.WriteLine("Email: "+Email);
            Console.WriteLine("Số điện thoại: "+Sdt);
            Console.WriteLine("Mã phụ huynh: "+MaPH);
        }
    }
}
-------------------------------------------------------------------------------------
using System;
using System.Collections.Generic;

namespace Project7
{
    public delegate void OnAddressPrint();

    public class Test
    {
        static event OnAddressPrint EventAddressPrint;
        static List<PhuHuynh> ListPhuHuynh = new List<PhuHuynh>();
        static List<SinhVien> ListSinhVien = new List<SinhVien>();
        static void Main(string[] args)
        {
            Console.OutputEncoding = System.Text.Encoding.Unicode;
            int choose;
            do
            {
                ShowMenu();
                choose = int.Parse(Console.ReadLine());
                switch (choose)
                {
                    case 1:
                        Console.WriteLine("Nhập số lượng phụ huynh: ");
                        int n = int.Parse(Console.ReadLine());
                        for (int i = 0; i < n; i++)
                        {
                            PhuHuynh ph = new PhuHuynh();
                            ph.Input();
                            ListPhuHuynh.Add(ph);
                        }
                        break;
                    case 2:
                        Console.WriteLine("Nhập số lượng sinh viên: ");
                        int m = int.Parse(Console.ReadLine());
                        int flag;
                        for (int i = 0; i < m; i++)
                        {
                            flag = 0;
                            SinhVien sv = new SinhVien();
                            sv.Input();
                            do
                            {
                                Console.WriteLine("Nhập mã phụ huynh: ");
                                sv.MaPH = Console.ReadLine();
                                foreach (PhuHuynh ph in ListPhuHuynh)
                                {
                                    if (sv.MaPH.Equals(ph.MaPH))
                                    {
                                        ListSinhVien.Add(sv);
                                        flag = 1;
                                    }
                                }
                                if (flag == 0)
                                {
                                    Console.WriteLine("Không có mã phụ huynh phù hợp");
                                }
                            } while (flag == 0);
                        }

                        break;
                    case 3:
                        Console.WriteLine("Nhập tên phụ huynh cần tìm kiếm: ");
                        string namePh = Console.ReadLine();
                        string codePH = "";
                        foreach (PhuHuynh ph in ListPhuHuynh)
                        {
                            if (ph.Ten.Equals(namePh))
                            {
                                codePH = ph.MaPH;
                            }
                        }
                        foreach (SinhVien sv in ListSinhVien)
                        {
                            if (codePH.Equals(sv.MaPH))
                            {
                                sv.Display();
                            }

                        }
                        break;
                    case 4:
                        Console.WriteLine("Nhập mã sinh viên cần tìm kiếm: ");
                        string masv = Console.ReadLine();
                        foreach (SinhVien sv in ListSinhVien)
                        {
                            if (masv.Equals(sv.MaSV))
                            {
                                foreach (PhuHuynh ph in ListPhuHuynh)
                                {
                                    if (sv.MaPH.Equals(ph.MaPH))
                                    {
                                        ph.Display();
                                    }
                                }
                            }
                        }
                        break;
                    case 5:
                        TestEvent();
                        break;
                    case 6:
                        Environment.Exit(0);
                        break;
                    default:
                        break;
                }

            } while (choose != 6);
        }

        static void ShowMenu()
        {
            Console.WriteLine("1. Nhập thông tin N phụ huynh");
            Console.WriteLine("2. Nhập thông tin M sinh viên");
            Console.WriteLine("3. Nhập tên phu huynh -> In ra thông tin các sinh viên được tham chiếu bởi phụ huynh này");
            Console.WriteLine("4. Nhập thông tinh sv -> In ra thông tin tra cứu phụ huynh");
            Console.WriteLine("5. Tạo delegate OnAddressPrint và sự kiện EventAddressPrint -> Thực hiện in thông tin sinh viên theo địa chỉ nhập vào.");
            Console.WriteLine("6.Thoát");
        }

        static void TestEvent()
        {
            EventAddressPrint = new OnAddressPrint(OnAddressEvent);
            EventAddressPrint();
        }

        static void OnAddressEvent()
        {
            Console.WriteLine("Nhập địa chỉ cần tìm kiếm");
            string address = Console.ReadLine();
            foreach (SinhVien sv in ListSinhVien)
            {
                if (address.Equals(sv.Address))
                {
                    sv.Display();
                }
            }
        }
    }
}

2020-07-11 05:10:23

using System;
using System.Collections.Generic;

namespace StudentManagerDelegate
{

    class Program
    {
        public delegate void OnAddressPrint(List<SinhVien> ListSV);
        static event OnAddressPrint EventAddressPrint;
        static void Menu()
        {
            Console.WriteLine("1.Nhap thong tin N phu huynh");
            Console.WriteLine("2.Nhap thong tin M sinh vien");
            Console.WriteLine("3.Tim kiem thong tin sinh vien(dung ma phu huynh)");
            Console.WriteLine("4.Tim kiem thong tin phu huynh(dung ma hoc sinh)");
            Console.WriteLine("5.In thong tin sinh vien theo dia chi nhap vao");
            Console.WriteLine("6.Exit");
        }
        static void ThemPhuHuynh(List<PhuHuynh> ListPH)
        {
            Console.WriteLine("Nhap N phu huynh : ");
            int N = int.Parse(Console.ReadLine());
            for (int i = 0; i < N; i++)
            {
                while (true)
                {
                    Console.WriteLine("Nhap thong tin phu huynh {0}.", (ListPH.Count));
                    PhuHuynh ph = new PhuHuynh();
                    ph.input();
                    int j;

                    for (j = 0; j < ListPH.Count; j++)
                    {
                        if (ListPH[j].MaPH.Equals(ph.MaPH))
                        {
                            Console.WriteLine("Ma phu huynh da ton tai.");
                            break;
                        }
                    }
                    if (j == ListPH.Count)
                    {
                        ListPH.Add(ph);
                        break;
                    }

                }

            }
        }
        static void ThemSinhVien(List<PhuHuynh> ListPH, List<SinhVien> ListSV)
        {
            Console.WriteLine("Nhap N sinh vien : ");
            int M = int.Parse(Console.ReadLine());
            for (int j = 0; j < M; j++)
            {       
                SinhVien sv = new SinhVien();             
                while (true) {
                    Console.WriteLine("Nhap thong tin sinh vien {0}.", (ListSV.Count));
                    sv.input();
                    int k;
                    for (k = 0; k < ListSV.Count; k++)
                    {
                        if (ListSV[k].MaSV.Equals(sv.MaSV))
                        {
                            Console.WriteLine("Ma sinh vien da ton tai.");
                            break;
                        }
                    }
                    if (k == ListSV.Count)
                    {                      
                        break;
                    }
                }
                while (true)
                {
                    Console.WriteLine("Nhap ma phu huynh : ");
                    string maPH = Console.ReadLine();
                    int i;
                    for (i = 0; i < ListPH.Count; i++)
                    {
                        if (ListPH[i].MaPH.Equals(maPH))
                        {
                            break;
                        }
                    }
                    if (i == ListPH.Count)
                    {
                        Console.WriteLine("Khong tim thay phu huynh");
                    }
                    else
                    {
                        sv.MaPH = maPH;
                        ListSV.Add(sv);
                        break;
                    }
                }

            }
        }
        static void TimPH(List<SinhVien> ListSV, List<PhuHuynh> ListPH)
        {
            Console.WriteLine("Nhap ma sinh vien : ");
            string maSV = Console.ReadLine();
            int i;
            string maPH = "";
            for (i = 0; i < ListSV.Count; i++)
            {
                if (ListSV[i].MaSV.Equals(maSV))
                {
                    maPH = ListSV[i].MaPH;
                    break;
                }
            }
            if (i == ListSV.Count)
            {
                Console.WriteLine("Khong tim thay sinh vien nao");
            }
            else
            {
                for (i = 0; i < ListPH.Count; i++)
                {
                    if (ListPH[i].MaPH.Equals(maPH)) ;
                    {
                        ListPH[i].display();
                        break;
                    }
                }
            }
        }
        static void TimSV(List<SinhVien> ListSV)
        {
            Console.WriteLine("Nhap ma phu huynh : ");
            string maPH = Console.ReadLine();
            int i = 0;
            for (i = 0; i < ListSV.Count; i++)
            {
                if (ListSV[i].MaPH.Equals(maPH))
                {
                    ListSV[i].display();
                    break;
                }
            }
            if (i == ListSV.Count)
            {
                Console.WriteLine("Khong tim thay sinh vien nao");
            }
        }
        static void ClickOnAddressPrintEvent(List<SinhVien> ListSV)
        {

            EventAddressPrint = new OnAddressPrint(OnAddressPrint_);
            EventAddressPrint(ListSV);
        }

        static void OnAddressPrint_(List<SinhVien> ListSV)
        {
            Console.WriteLine("Enter address : ");
            string adress = Console.ReadLine();
            for (int i = 0; i < ListSV.Count; i++)
            {
                if (ListSV[i].DiaChi.Equals(adress))
                {
                    ListSV[i].display();
                }
            }
        }
        static void Main(string[] args)
        {
            List<PhuHuynh> ListPH = new List<PhuHuynh>();
            List<SinhVien> ListSV = new List<SinhVien>();
            while (true)
            {
                Menu();
                int choice = int.Parse(Console.ReadLine());
                switch (choice)
                {
                    case 1:
                        ThemPhuHuynh(ListPH);
                        break;
                    case 2:
                        ThemSinhVien(ListPH, ListSV);
                        break;
                    case 3:
                        TimSV(ListSV);
                        break;
                    case 4:
                        TimPH(ListSV, ListPH);
                        break;
                    case 5:
                        ClickOnAddressPrintEvent(ListSV);
                        break;
                    case 6:
                        break;
                }
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;

namespace StudentManagerDelegate
{
    class SinhVien
    {
        public string MaSV { get; set; }
        public string Ten { get; set; }
        public string DiaChi { get; set; }
        public string Email { get; set; }
        public string MaPH { get; set; }

        public SinhVien(string maSV, string ten, string diaChi, string email, string maPH)
        {
            MaSV = maSV;
            Ten = ten;
            DiaChi = diaChi;
            Email = email;
            MaPH = maPH;
        }

        public SinhVien()
        {
        }
        public void input() {
            Console.WriteLine("Nhap ma sinh vien : ");
            MaSV = Console.ReadLine();
            Console.WriteLine("Nhap ten sinh vien : ");
            Ten = Console.ReadLine();
            Console.WriteLine("Nhap dia chi : ");
            DiaChi = Console.ReadLine();
            Console.WriteLine("Nhap email : ");
            Email = Console.ReadLine();        
          
        }
        public void display() {
            Console.WriteLine("Ma sinh vien : {0} , Ten sinh vien : {1} , Dia chi : {2} , Email : {3} , Ma phu huynh : {4}", MaSV,Ten,DiaChi,Email,MaPH);
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;

namespace StudentManagerDelegate
{
    class PhuHuynh
    {
        public string MaPH { get; set; }
        public string DiaChi { get; set; }
        public string SDT { get; set; }

        public PhuHuynh()
        {
        }

        public PhuHuynh(string maPH, string diaChi, string sDT)
        {
            MaPH = maPH;
            DiaChi = diaChi;
            SDT = sDT;
        }
        public void input() {
            Console.WriteLine("Nhap ma phu huynh : ");
            MaPH = Console.ReadLine();
            Console.WriteLine("Nhap dia chi : ");
            DiaChi = Console.ReadLine();
            Console.WriteLine("Nhap SDT : ");
            SDT = Console.ReadLine();

        }
        public void display() {
            Console.WriteLine("Ma phu huynh :  {0} , Dia chi : {1} , SDT : {2}", MaPH, DiaChi,SDT);
        }
    }
}

2020-07-10 14:07:06

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplicationtest
{
    public class DataMgr
    {
        private static DataMgr _instance = null;
        public List<PhuHuynh> ListPhuHuynh;
        public List<SinhVien> ListSinhVien;

        private DataMgr()
        {
            ListPhuHuynh = new List<PhuHuynh>();
            ListSinhVien = new List<SinhVien>();
        }
        
        public static DataMgr Instance
        {
            get
            {
                if (_instance == null)
                {
                    _instance = new DataMgr();
                }
                return _instance;
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplicationtest
{
    public class PhuHuynh
    {
        // tên, địa chỉ, sđt, mã phụ huynh -> Mỗi sinh viên sẽ được liên kết vs một phụ huynh -> Viết hàm nhập và hàm hiển thị
        public string Ten { get; set; }
        public string SoDT { get; set; }
        public string MaPH { get; set; }

        public PhuHuynh()
        {

        }

        public void Input()
        {
            Console.WriteLine("Nhap vao ma phu huynh di ban oi");
            MaPH = Console.ReadLine();
            Console.WriteLine("Nhap vao ten phu huynh di ban oi");
            Ten = Console.ReadLine();
            Console.WriteLine("Nhap vao so dien thoai di ban oi");
            SoDT = Console.ReadLine();
        }

        public void Display()
        {
            Console.WriteLine("Ma phu huynh la {0} | Ten phu huynh la {1} | So dien thoai la {2}", MaPH, Ten, SoDT);
        }


    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplicationtest
{
    public class SinhVien
    {
        //tên, tuổi, mã sinh viên, địa chỉ, email, sđt, mã phụ huynh 
        public string Ten { get; set; }
        public string MaSV { get; set; }
        public string DiaChi { get; set; }
        public string Email { get; set; }
        public string SoDT { get; set; }
        public string MaPH { get; set; }

        public SinhVien()
        { }

        public void Input()
        {
            Console.WriteLine("Nhap vao ten sinh vien");
            Ten = Console.ReadLine();
            Console.WriteLine("Nhap vao ma sinh vien");
            MaSV = Console.ReadLine();
            Console.WriteLine("Nhap vao dia chi");
            DiaChi = Console.ReadLine();
            Console.WriteLine("Nhap vao email");
            Email = Console.ReadLine();
            Console.WriteLine("Nhap vao so dien thoai");
            SoDT = Console.ReadLine();
            Console.WriteLine("Nhap vao ma phu huynh");
            string mph = Console.ReadLine();
            foreach (PhuHuynh ph in DataMgr.Instance.ListPhuHuynh)
            {
                if (mph.Equals(ph.MaPH))
                {
                    return;
                }
            }
            // neu khong ton tai ma phu huynh thi bao nhap moi nhe'
            Console.WriteLine("Bay gio nhap phu huynh moi nhe");
            PhuHuynh newph = new PhuHuynh();
            newph.Input();
            DataMgr.Instance.ListPhuHuynh.Add(newph);
            MaPH = mph;
        }

        public void Display()
        {
            Console.WriteLine("Ma sinh vien la {0} | Ten sinh vien la {1} | Dia chi la {2} | Email la {3} | So dien thoai {4} | Ma phu huynh {5}", MaSV, Ten, DiaChi, Email, SoDT, MaPH);
        }

    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplicationtest
{
    public delegate void OnAddressPrint();
    public class Program
    {
        static event OnAddressPrint OnSave;
        public static void Main(string[] args)
        {
            int choice = 0;
            do
            {
                ShowMenu();
                choice = int.Parse(Console.ReadLine());
                switch (choice)
                {
                    case 1:
                        Console.WriteLine("Nhap vao so luong phu huynh");
                        int n = int.Parse(Console.ReadLine());
                        for (int i = 0; i < n; i++)
                        {
                            PhuHuynh newph = new PhuHuynh();
                            newph.Input();
                            DataMgr.Instance.ListPhuHuynh.Add(newph);
                        }
                        break;
                    case 2:
                        Console.WriteLine("Nhap vao so luong sinh vien");
                        int m = int.Parse(Console.ReadLine());
                        for (int i = 0; i < m; i++)
                        {
                            SinhVien newsv = new SinhVien();
                            newsv.Input();
                            DataMgr.Instance.ListSinhVien.Add(newsv);
                        }
                        break;
                    case 3:
                        Console.WriteLine("Nhap vao ma phu huynh");
                        string mph = Console.ReadLine();
                        foreach (SinhVien sv in DataMgr.Instance.ListSinhVien)
                        {
                            if (sv.MaPH.Equals(mph))
                            {
                                sv.Display();
                            }
                        }
                        break;
                    case 4:
                        Console.WriteLine("Nhap vao ma sinh vien");
                        string msv = Console.ReadLine();
                        foreach (SinhVien sv in DataMgr.Instance.ListSinhVien)
                        {
                            if (sv.MaPH.Equals(msv))
                            {
                                foreach(PhuHuynh ph in DataMgr.Instance.ListPhuHuynh)
                                {
                                    if (ph.MaPH.Equals(sv.MaPH))
                                    {
                                        ph.Display();
                                        break;
                                    }
                                }
                                
                            }
                        }
                        break;
                    case 5:
                        TestEvents();
                        break;
                    case 6:
                        Console.WriteLine("Exit");
                        break;
                    default:
                        Console.WriteLine("Invalid input ...");
                        break;
                }
            } while (choice != 6);
        }

        static void TestEvents()
        {
            OnSave = new OnAddressPrint(OnSaveEvent);
            OnSave();
        }

        static void OnSaveEvent()
        {
            Console.WriteLine("Nhap vao dia chi sinh vien");
            string diaChi = Console.ReadLine();
            foreach(SinhVien sv in DataMgr.Instance.ListSinhVien)
            {
                if (sv.DiaChi.Equals(diaChi))
                {
                    sv.Display();
                }
            }
        }

        static void ShowMenu()
        {
            Console.WriteLine("1.Nhập thông tin N phụ huynh");
            Console.WriteLine("2.Nhập thông tin M sinh viên");
            Console.WriteLine("3.Nhập tên phu huynh->In ra thông tin các sinh viên được tham chiếu bởi phụ huynh này");
            Console.WriteLine("4.Nhập thông tinh sv->In ra thông tin tra cứu phụ huynh");
            Console.WriteLine("5.Tạo delegate OnAddressPrint và sự kiện EventAddressPrint -> Thực hiện in thông tin sinh viên theo địa chỉ nhập vào.");
            Console.WriteLine("6. Exit.");
            Console.WriteLine("Your choice : ...");
        }
    }
}

2020-07-10 14:05:37

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace QLSV
{
    public delegate void OnAddressPrint();
    class Program
    {
        static event OnAddressPrint EventAddressPrint;

        static List<Parents> parentsList = new List<Parents>();
        static List<Student> studentList = new List<Student>();
        static void Main(string[] args)
        {
            while (true)
            {
                Menu();
                int choose = int.Parse(Console.ReadLine());
                switch (choose)
                {
                    case 1:
                        InsertParent();
                        break;
                    case 2:
                        InsertStudent();
                        break;
                    case 3:
                        FindStudent();
                        break;
                    case 4:
                        FindParent();
                        break;
                    case 5:
                        DisplayStdAddress();
                        break;
                    default:
                        break;
                }
            }
        }

        static void Menu()
        {
            Console.WriteLine("1. Nhap n phu huynh");
            Console.WriteLine("2. Nhap m sinh vien");
            Console.WriteLine("3. In ra sinh vien theo Phu huynh");
            Console.WriteLine("4. In ra phu huynh theo Sinh vien");
            Console.WriteLine("5. In ra sinh vien theo dia chi");
            Console.Write("Choose: ");
        }

        static void InsertParent()
        {
            Console.Write("N = ");
            int n = int.Parse(Console.ReadLine());
            for (int i = 0; i < n; i++)
            {
                Parents p = new Parents();
                p.input();
                parentsList.Add(p);
            }
        }
        static void InsertStudent()
        {
            Console.Write("M = ");
            int n = int.Parse(Console.ReadLine());
            for (int i = 0; i < n; i++)
            {
                Student p = new Student();
                p.input();
                int flag;
                do
                {
                    Console.WriteLine("Insert Code Parent: ");
                    p.CodePrt = Console.ReadLine();
                    flag = 0;
                    foreach (Parents prt in parentsList)
                    {
                        if (prt.Code.Equals(p.CodePrt))
                        {
                            flag = 1;
                        }
                    }
                    if (flag==0)
                    {
                        Console.WriteLine("No parent have this code");
                    }
                } while (flag == 0);
                studentList.Add(p);
            }
        }
        static void FindStudent()
        {
            Console.Write("Parent Name: ");
            string search = Console.ReadLine();
            foreach (Parents p in parentsList)
            {
                if (p.Name.Equals(search))
                {
                    Console.WriteLine("\tParent: ");
                    p.display();
                    Console.WriteLine("\tStudent: ");
                    foreach (Student s in studentList)
                    {
                        if (s.CodePrt.Equals(p.Code))
                        {
                            s.display();
                        }
                    }
                    return;
                }
            }
        }
        static void FindParent()
        {
            Console.Write("Student Code: ");
            string search = Console.ReadLine();
            foreach (Student s in studentList)
            {
                if (s.CodeStd.Equals(search))
                {
                    Console.WriteLine("\tStudent: ");
                    s.display();
                    Console.WriteLine("\tParent: ");
                    foreach (Parents p in parentsList)
                    {
                        if (p.Code.Equals(s.CodePrt))
                        {
                            p.display();
                        }
                    }
                }
            }
        }

        static void DisplayStdAddress()
        {
            EventAddressPrint = new OnAddressPrint(AddressPrint);
            EventAddressPrint();
        }

        static void AddressPrint()
        {
            Console.Write("Dia chi: ");
            string addr = Console.ReadLine();
            foreach (Student s in studentList)
            {
                if (s.Address.Equals(addr))
                {
                    s.display();
                }
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace QLSV
{
    class Parents
    {
        public string Name { get; set; }
        public string Address { get; set; }
        public string sdt { get; set; }
        public string Code { get; set; }

        public Parents()
        {

        }

        public Parents(string name, string address, string sdt, string code)
        {
            Name = name;
            Address = address;
            this.sdt = sdt;
            Code = code;
        }

        public void input()
        {
            Console.WriteLine("\nInsert Name: ");
            Name = Console.ReadLine();
            Console.WriteLine("Insert Address: ");
            Address = Console.ReadLine();
            Console.WriteLine("Insert sdt: ");
            sdt = Console.ReadLine();
            Console.WriteLine("Insert Code: ");
            Code = Console.ReadLine();
        }

        public void display()
        {
            Console.WriteLine("Name: {0}; Address: {1}; sdt: {2}; Code: {3}", Name, Address, sdt, Code);
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace QLSV
{
    class Student
    {
        public string Name { get; set; }
        public int Age { get; set; }
        public string Address { get; set; }
        public string sdt { get; set; }
        public string Email { get; set; }
        public string CodeStd { get; set; }
        public string CodePrt { get; set; }

        public Student()
        {

        }

        public Student(string name, int age, string address, string sdt, string email, string codeStd, string codePrt)
        {
            Name = name;
            Age = age;
            Address = address;
            this.sdt = sdt;
            Email = email;
            CodeStd = codeStd;
            CodePrt = codePrt;
        }

        public void input()
        {
            Console.WriteLine("\nInsert Name: ");
            Name = Console.ReadLine();
            Console.WriteLine("Insert Age: ");
            Age = int.Parse(Console.ReadLine());
            Console.WriteLine("Insert Address: ");
            Address = Console.ReadLine();
            Console.WriteLine("Insert sdt: ");
            sdt = Console.ReadLine();
            Console.WriteLine("Insert Email: ");
            Email = Console.ReadLine();
            Console.WriteLine("Insert Code Student: ");
            CodeStd = Console.ReadLine();
        }

        public void display()
        {
            Console.WriteLine("Name: {0}; Age: {1}; Address: {2}; sdt: {3}; Email: {4}; CodeStd: {5}; CodePrt: {6}", Name, Age, Address, sdt, Email, CodeStd, CodePrt);
        }
    }
}

2020-06-05 08:52:01

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BaiThiC
{
    class ContactManager
    {

        
        static void Main(string[] args)
        {
            Hashtable hash = new Hashtable();
            int choose;
            do
            {
                show();
                choose = Int32.Parse(Console.ReadLine());
                switch (choose)
                {
                    case 1:
                        Console.WriteLine("Nhap so luong so nhap:");
                        int n = Int32.Parse(Console.ReadLine());
                        Input(n, hash);
                        break;
                    case 2:
                        Search(hash);
                        break;
                    case 3:
                        Display(hash);
                        break;
                    case 4:
                        Console.WriteLine("Exit success");
                        break;
                    default:
                        Console.WriteLine("Error");
                        break;
                }

            } while (choose != 4);

        }
        private static void show()
        {
            Console.WriteLine("1. Add new contact");
            Console.WriteLine("2. Find a contact by name");
            Console.WriteLine("3. Display contacts");
            Console.WriteLine("4. Exit");
            Console.WriteLine("Enter choose: ");
        }

        private static void Input(int n, Hashtable hash)
        {
            for(int i =0; i < n; i++)
            {
                Phone phone = new Phone();
                phone.Input();
                hash.Add(phone.Name, phone.PhoneNumber);
            }
        }
        private static void Display(Hashtable hash)
        {
            ICollection key = hash.Keys;

            foreach (string k in key)
            {
                Console.WriteLine(k + ": " + hash[k]);
            }

        }

        private static void Search(Hashtable hash) {
            ICollection key = hash.Keys;
            Console.WriteLine("Enter name to searh: ");
            string name = Console.ReadLine();
            foreach (string k in key)
            {

                if (name.Equals(k))
                {
                  Console.WriteLine(k + ": " + hash[k]);
                }
                else
                {
                    Console.WriteLine("No names in contacts");
                }
               
            }
        }

    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BaiThiC
{
    class Phone
    {
        public string FullName { get; set; }

        public int PhoneNumber { get; set; }

        public void Input()
        {
            bool ischeck = true;
            while (ischeck)
            {
                Console.Write("Nhap ten: ");
                FullName = Console.ReadLine();
                if (string.IsNullOrEmpty(FullName) == false)
                {
                    ischeck = false;
                }
                else
                {
                    Console.WriteLine("Loi.");
                }
            }
            Console.WriteLine("Nhap so dien thoai: ");
            PhoneNumber = Int32.Parse(Console.ReadLine());
        }

        public void Display()
        {
            Console.WriteLine("Ten: {0}; So dien thoai: {1}", FullName, PhoneNumber);
        }

    }
}

2020-05-30 07:44:13

using System;
using System.Collections.Generic;
using System.Text;

namespace Inforstudent
{
    class Student
    {
        public string studentID { get; set; }
        public string name { get; set; }
        public int age { get; set; }
        public string address { get; set; }
        public string email { get; set; }

        public string sdt { get; set; }
        public string prtId { get; set; }

        public Student()
        {

        }
        public void input(List<Parent> lParent, List<string> vs)
        {

            inputStudentID(vs);
            Console.WriteLine("Name of student : ");
            name = Console.ReadLine();


            inputAge();
            Console.WriteLine("Address : ");
            address = Console.ReadLine();
            inputSdt();
            inputemail();
            inputParentId(lParent);

        }

        private void inputParentId(List<Parent> lParent)
        {
            Console.WriteLine("ParentID : ");
            prtId = Console.ReadLine();
            bool ischeck = false;
            foreach (var item in lParent)
            {
                if (item.prtId.Equals(prtId))
                {
                    ischeck = true;
                    break;
                }
            }
            if (!ischeck)
            {
                Parent parent = new Parent();
                parent.input(prtId);
            }

        }
        private void inputAge()
        {


            bool ischeck = true;
            while (ischeck)
            {
                Console.WriteLine("Age :");
                
                string c2 = Console.ReadLine();
                if (checkc(c2) && c2.Length == 10&&string.IsNullOrEmpty(c2)==false)
                {
                    age = int.Parse(c2);
                    ischeck = false;
                    break;
                }
                else
                {
                    Console.WriteLine("Error !!");
                }
            }

        }
        private void inputSdt()
        {


            bool ischeck = true;
            while (ischeck)
            {
                Console.WriteLine("Telephone number : ");
                sdt = Console.ReadLine();
                if (checkc(sdt) && sdt.Length == 10)
                {
                    ischeck = false;
                    break;
                }
            }

        }

        bool checkc(string s)
        {
            bool check = true;
            foreach (char item in s)
            {
                if (item < 48 || item > 57)
                {
                    check = false;
                    break;
                }

            }
            return check;
        }
        private void inputemail()
        {
            bool isCheck = true;
            while (isCheck)
            {
                Console.WriteLine("email : ");
                email = Console.ReadLine();
                if (!email.Contains("@") || email.Contains(" ")||email.Length<12)
                {
                    Console.WriteLine("Error : email is constaining '@' or space");
                }
                else
                {
                    isCheck = false;
                }
            }
        }
        public void display()
        {
            Console.WriteLine("tên : {0}, tuổi : {1}, mã sinh viên {2}, địa chỉ : {3}," +
                " email : {4} , sđt : {5}, mã phụ huynh : {6}"
                , name, age, studentID, address, email, sdt, prtId);
        }
        private void inputStudentID(List<string> vs)
        {
            bool ischeck = false;
            for (; ischeck == false;)
            {
                Console.WriteLine("ID : ");
                studentID = Console.ReadLine();
                foreach (string str in vs)
                {
                    if (studentID.Equals(str))
                    {
                        Console.WriteLine("StudentID da ton tai !!");
                        ischeck = true;
                        break;
                    }
                }
                if (!ischeck&&string.IsNullOrEmpty(studentID)==false)
                {
                    vs.Add(studentID);
                    ischeck = true;
                    break;
                }
                else
                {
                    Console.WriteLine("Error !!");
                    ischeck = false;
                }
            }
        }
    }
}

using Inforstudent;
using System;
using System.Collections.Generic;
using System.Text;
namespace InforStudent
{
    public delegate void OnAddressPrint(string str);
    class Program
    {
        static event OnAddressPrint EventAddressPrint;
        static List<Parent> lParent = new List<Parent>();
        static List<Student> lStudent = new List<Student>();
        static List<string> ids = new List<string>();
        static int c;
        static void Main(string[] args)
        {
            Console.OutputEncoding = Encoding.UTF8;
            Console.WriteLine("Hello World!");

            
            do
            {
                menu();
                inputc();
                switch (c)
                {
                    case 1:
                        case1();
                        break;
                    case 2:
                        case2();
                        break;
                    case 3:
                        case3();
                        break;
                    case 4:
                        case4();
                        break;
                    case 5:
                        case5();
                        break;

                    default:
                        Console.WriteLine("nhap sai !!!");
                        break;
                }

            } while (c != 6);

        }
        static void inputc()
        {


            bool ischeck = true;
            while (ischeck)
            {
                
                string c2 = Console.ReadLine();
                if (checkc(c2) && string.IsNullOrEmpty(c2)==false )
                {
                    c = int.Parse(c2);
                    ischeck = false;
                    break;
                }
                else
                {
                    Console.WriteLine("Error !!");
                }
            }

        }

         static bool checkc(string s)
        {
            bool check = true;
            foreach (char item in s)
            {
                if (item < 48 || item > 57)
                {
                    check = false;
                    break;
                }

            }
            return check;
        }
        static void menu()
        {
            Console.WriteLine("1. Nhập thông tin N phụ huynh");
            Console.WriteLine("2. Nhập thông tin M sinh viên");
            Console.WriteLine("3. thông tin các sinh viên được tham chiếu bởi phụ huynh");
            Console.WriteLine("4. thông tin tra cứu phụ huynh");
            Console.WriteLine("5. in thông tin sinh viên theo địa chỉ nhập vào.");
            Console.WriteLine("6. thoat");
            Console.WriteLine("chon : ");
        }
        static void case5()
        {
            Console.WriteLine("Enter address to search : ");
            string find = Console.ReadLine();
            EventAddressPrint += new  OnAddressPrint(FindStdByAddress);
            EventAddressPrint(find);
        }
        static void FindStdByAddress(string address)
        {
            foreach (Student student in lStudent)
            {
                if (student.address.Equals(address))
                {
                    student.display();
                }
            }
        }
        static void case4()
        {

            bool ischeck = false;
            Console.WriteLine("Enter studentId: ");
            string find = Console.ReadLine();
            foreach (var item in lStudent)
            {
                if (find.Equals(item.prtId))
                {
                    ischeck = true;
                    break;
                }
            }
            if (!ischeck)
            {
                Console.WriteLine("khoong ton tai studentId !!");
            }

            foreach (var item in lParent)
            {
                if (item.prtId.Equals(find))
                {
                    Console.WriteLine("Information of parent  : ");
                    item.display();
                    break;
                }
            }
        }
        static void case2()
        {
            int count = 0;
            while (true)
            {
                Console.WriteLine("nhap thong tin student {0}", ++count);
                Student student = new Student();
                student.input(lParent, ids);
                lStudent.Add(student);
                Console.WriteLine("nhap them thong tin student : (y/n) ");
                string option = Console.ReadLine();
                if (option.Equals("n"))
                {
                    break;
                }
            }
        }
        static void case3()
        {
            bool ischeck = false;
            Console.WriteLine("nhap ma phu huynh : ");
            string find = Console.ReadLine();
            foreach (var item in lParent)
            {
                if (find.Equals(item.prtId))
                {
                    ischeck = true;
                    break;
                }
            }
            if (!ischeck)
            {
                Console.WriteLine("khoong ton tai ParentID !!");
            }

            foreach (var item in lStudent)
            {
                if (item.prtId.Equals(find))
                {
                    item.display();
                }
            }


        }
        static void case1()
        {

            int count = 0;
            while (true)
            {
                Console.WriteLine("nhap thong tin parent {0}", ++count);
                Parent parent = new Parent();
                parent.input(ids);
                lParent.Add(parent);

                Console.WriteLine("nhap them thong tin parent : (y/n) ");
                string option = Console.ReadLine();
                if (option.Equals("n"))
                {
                    break;
                }
            }
        }


    }
}

using System;
using System.Collections.Generic;
using System.Text;

namespace Inforstudent
{
    class Parent
    {
        public string name { get; set; }
        public string address { get; set; }
        public string sdt { get; set; }
        public string prtId { get; set; }
        public Parent()
        {
        }
        public void input(List<string> vs)
        {

            inputParentID(vs);
            input(prtId);
        }
        public void input(string prtID)
        {
            Console.WriteLine("Name  of parent : ");
            name = Console.ReadLine();
            Console.WriteLine("Address : ");
            address = Console.ReadLine();
            inputSdt();
            this.prtId = prtID;
        }
        public void display()
        {
            Console.WriteLine("Name  of parent : {0} | Address : {1} | Telephone number : {2} | ParentID : {3}",name,address,sdt,prtId);

        }
        private void inputSdt()
        {


            bool ischeck = true;
            while (ischeck)
            {
                Console.WriteLine("Telephone number : ");
                sdt = Console.ReadLine();
                if (checkc(sdt) && sdt.Length == 10 && string.IsNullOrEmpty(sdt) == false)
                {
                    ischeck = false;
                    break;
                }
            }

        }
        bool checkc(string s)
        {
            bool check = true;
            foreach (char item in s)
            {
                if (item < 48 || item > 57)
                {
                    check = false;
                    break;
                }

            }
            return check;
        }
        private void inputParentID(List<string> vs)
        {
            bool ischeck = false;
            for (; ischeck == false ; )
            {
                Console.WriteLine("ParentId :");
                prtId = Console.ReadLine();
                foreach (string str in vs)
                {
                    if (prtId.Equals(str))
                    {
                        Console.WriteLine("ParantId da ton tai !!");
                        ischeck = true;
                        break;
                    }
                }
                if (!ischeck && string.IsNullOrEmpty(prtId)== false)
                {
                    vs.Add(prtId);
                    ischeck = true;
                    break;
                }
                else
                {
                    ischeck = false;
                }
            }
        }
        
    }
}

2020-05-29 09:09:52

using System;
using System.Collections.Generic;

namespace Lession07Project
{

    public delegate void OnAddressPrint();
    class Program
    {

        static event OnAddressPrint EventAddressPrint;
        
        static void Main(string[] args)
        {
            

            List<Parent> parentlist = new List<Parent>();
            List<People> peoplelist = new List<People>();
            int choice;

            do
            {
                showMenu();
                Console.WriteLine("Moi ban nhap lua chon :");
                choice = int.Parse(Console.ReadLine());

                switch(choice)
                {
                    case 1:
                        for (; ; )
                        {
                            Console.WriteLine(" Moi ban nhap thong tin sinh vien :");
                            People people = new People();
                            people.input();
                            peoplelist.Add(people);

                            Console.WriteLine(" Ban co muon nhap nua khong ? : Y/N");
                            String option;
                            option = Console.ReadLine();

                            if (option.Equals("N"))
                            {
                                break;
                            }    
                        } 
                        break;
                    case 2:
                        for (; ; )
                        {
                            Console.WriteLine(" Moi ban nhap thong tin phu huynh :");
                            Parent parent = new Parent();
                            parent.input();
                            parentlist.Add(parent);
                            Console.WriteLine(" Ban co muon nhap nua khong ? : Y/N");
                            String option;
                            option = Console.ReadLine();

                            if (option.Equals("N"))
                            {
                                break;
                            }
                        }

                        break;
                    case 3:
                        Console.WriteLine("Moi ban nhap ten phu huynh :");
                        String Parentname = Console.ReadLine();

                        foreach(Parent parent in parentlist)
                        {
                            if (parent.name.Equals(Parentname))
                            {
                                foreach (People people in peoplelist)
                                {
                                    if (parent.Parentrollnumber.Equals(people.Parentrollnumber))
                                    {
                                        people.display();
                                    }    
                                 }
                            }    
                        }    
                        break;
                    case 4:
                        Console.WriteLine("Moi ban nhap ten sinh vien :");
                        String Studentname = Console.ReadLine();

                        foreach(People student in peoplelist)
                        {
                            if (student.name.Equals(Studentname))
                            {
                                foreach(Parent parent in parentlist)
                                {
                                    if(student.Parentrollnumber.Equals(parent.Parentrollnumber))
                                    {
                                        parent.display();
                                    }    
                                }    
                            }    
                        }    
                        break;
                    case 5:
                       // EventAddressPrint += new OnAddressPrint(showPeople);
                       //EventAddressPrint();

                        Console.WriteLine("Moi ban nhap vao dia chi sinh vien :");
                        String address = Console.ReadLine();

                        foreach (People people in peoplelist)
                        {
                            if (address.Equals(people.address))
                            {
                                people.display();
                            }
                        }

                        break;
                    case 6:
                        Console.WriteLine("Exit");
                        break;
                    default:
                        Console.WriteLine("Wrong input");
                        break;
                }    

            } while (choice != 6);
            
        }

        static void showMenu()
        {
            Console.WriteLine("1. Nhập thông tin N phụ huynh");
            Console.WriteLine("2. Nhập thông tin M sinh viên");
            Console.WriteLine("3. Nhập tên phụ huynh -> hiện ra các sinh viên được tham chiếu");
            Console.WriteLine("4. Nhập tên sinh viên -> hiện ra  phụ huynh được tham chiếu");
            Console.WriteLine("5. Tạo delegate OnAddressPrint và sự kiện EventAddressPrint -> Thực hiện in thông tin sinh viên theo địa chỉ nhập vào.");
            Console.WriteLine("6. Exit");
        }

         /* static void showPeople()  // How to access a link in another method ?
        {
            Console.WriteLine("Moi ban nhap vao dia chi sinh vien :");
            String address = Console.ReadLine();

            foreach(People people in peoplelist )
            {
                if ( address.Equals(people.address))
                {
                    people.display();
                }    
            }    
                
        } */ 
    }
}