2021-10-12 14:37:29

#ClassRoom.cs

using System.Collections.Generic;

namespace _1536
{
    internal class ClassRoom
    {
        public string name { get; set; }
        public string address { get; set; }
        public List<Student> studentList { get; set; }

        public ClassRoom()
        {
        }

        public ClassRoom(string name, string address, List<Student> studentList)
        {
            this.name = name;
            this.address = address;
            this.studentList = studentList;
        }

        public void input()
        {
            System.Console.Write("nhap name : ");
            this.name = name;
            System.Console.Write("nhap address : ");
            this.address = address;
            System.Console.Write("nhap studentList : ");
            this.studentList = studentList;
        }

        public void display()
        {
            System.Console.WriteLine(this);
            foreach (var item in studentList)
            {
                item.display();
            }
        }

        public override string ToString()
        {
            return "ClassRoom{" + "name=" + name + ", address=" + address + '}';
        }
    }
}

#Main.cs

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;

namespace _1536
{
    internal class main
    {
        private static List<ClassRoom> classList = new List<ClassRoom>();

        private static void Main(string[] args)
        {
            while (true)
            {
                switch (menu())
                {
                    case 1:
                        {
                            string json = "";
                            using (StreamReader sr = new StreamReader("./data.json"))
                            {
                                string line;

                                while ((line = sr.ReadLine()) != null)
                                {
                                    json += line;
                                }
                            }
                            classList = JsonConvert.DeserializeObject<List<ClassRoom>>(json);
                            break;
                        }

                    case 2:
                        {
                            foreach (var item in classList)
                            {
                                item.display();
                            }
                            break;
                        }

                    case 3:
                        {
                            foreach (var item in classList)
                            {
                                using (StreamWriter sw = new StreamWriter(item.name + ".json"))
                                {
                                    sw.WriteLine(JsonConvert.SerializeObject(item));
                                }
                            }
                            Console.WriteLine("da tao file !");
                            break;
                        }

                    default:
                        {
                            Environment.Exit(0);
                            break;
                        }
                }
            }
        }

        private static int menu()
        {
            Console.WriteLine("1. Nhập thông tin sinh viên từ file json (data.json -> xem nội dụng file đc import ở dưới)\n" +
            "\n" +
            "2. Hiển thị thông tin sinh viên\n" +
            "\n" +
            "3. Lưu thông tin mỗi lớp học vào 1 file ten_lop.obj");

            return Utility.ReadInt();
        }
    }
}

#Student.cs

namespace _1536
{
    internal class Student
    {
        public string fullname { get; set; }
        public string birthday { get; set; }
        public string email { get; set; }
        public string address { get; set; }
        public string gender { get; set; }

        public Student()
        {
        }

        public Student(string fullname, string birthday, string email, string address, string gender)
        {
            this.fullname = fullname;
            this.birthday = birthday;
            this.email = email;
            this.address = address;
            this.gender = gender;
        }
        public void input()
        {
            System.Console.Write("nhap fullname : ");
            this.fullname = fullname;
            System.Console.Write("nhap birthday : ");
            this.birthday = birthday;
            System.Console.Write("nhap email : ");
            this.email = email;
            System.Console.Write("nhap address : ");
            this.address = address;
            System.Console.Write("nhap gender : ");
            this.gender = gender;
        }
        public void display()
        {
            System.Console.WriteLine(this);
        }
        public override string ToString()
        {
            return "Student{" + "fullname=" + fullname + ", birthday=" + birthday + ", email=" + email + ", address=" + address + ", gender=" + gender + '}';
        }
    }
}

#Utility.cs

using System;

namespace _1536
{
    internal class Utility
    {
        public static int ReadInt()
        {
            int integer = 0;
            while (true)
            {
                try
                {
                    integer = int.Parse(Console.ReadLine());
                    break;
                }
                catch (Exception)
                {
                    Console.Write("du lieu dau vao khong hop le, nhap lai : ");
                }
            }
            return integer;
        }
    }
}

2021-10-05 17:47:18

#ClassRoom.cs

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

namespace FileExImportExport
{
    [Serializable]
    class ClassRoom
    {
        public string Name { get; set; }
        public string Address { get; set; }
        public List<Student> studentList;
        public ClassRoom()
        {
            this.studentList = new List<Student>();
        }
        public ClassRoom(string Name, string Address)
        {
            this.Name = Name;
            this.Address = Address;
            this.studentList = new List<Student>();
        }
        public ClassRoom(string Name, string Address, List<Student> studentList)
        {
            this.Name = Name;
            this.Address = Address;
            this.studentList = studentList;
        }

        public void input()
        {
            Console.WriteLine("Input Class Name:");
            Name = Console.ReadLine();
            Console.WriteLine("Input Address:");
            Address = Console.ReadLine();
        }

        public void display()
        {
            Console.WriteLine("Name: {0}\nAddress: {1}\nStudents List:", Name, Address);
            foreach(Student s in studentList)
            {
                s.display();
            }
        }

    }
}

#Program.cs

using System;
using System.Collections.Generic;
using System.IO;

namespace FileExImportExport
{
    class Program
    {
        public static List<ClassRoom> ClassList = new List<ClassRoom>();
        public static void showMenu()
        {
            Console.WriteLine("1. Read Data and add Classes to list\n" +
                "2. Show all classes\n" +
                "3. Save classes to obj files.\n" +
                "4. Exit"
                );

        }
        public static List<ClassRoom> ImportJSON(List<ClassRoom> Class)
        {
            var data = System.IO.File.ReadAllText(@"data.json");
            List<ClassRoom> Dump = Newtonsoft.Json.JsonConvert.DeserializeObject<List<ClassRoom>>(data);
            Class = Dump;
            Console.WriteLine("Imported");
            return Class;
        }

        public static void showClasses()
        {
            foreach(ClassRoom classRoom in ClassList)
            {
                classRoom.display();
            }
        }
        public static void saveClassToFile()
        {
            foreach (ClassRoom classroom in ClassList)
            {
                using (Stream stream = File.Open(classroom.Name + ".json", FileMode.Create))
                {
                    var binaryFormatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
                    binaryFormatter.Serialize(stream, classroom);
                }
            }
            Console.WriteLine("Saved");
        }
        static void Main(string[] args)
        {
            int choose;
            do
            {
                showMenu();
                choose = Utility.ReadInt();
                switch (choose)
                {
                    case 1:
                        ClassList = ImportJSON(ClassList);
                        break;
                    case 2:
                        showClasses();
                        break;
                    case 3:
                        saveClassToFile();
                        break;
                    default:
                        Console.WriteLine("Invalid Input");
                        break;
                }
            }
            while (choose != 4);
            
        }
    }
}

#Student.cs

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

namespace FileExImportExport
{
    [Serializable]
    class Student
    {
        public string FullName { get; set; }
        public DateTime Birthday { get; set; }
        public string Address { get; set; }
        public string Email { get; set; }
        public string Gender { get; set; }

        public Student()
        {

        }
        public Student(string FullName, string Birthday, string Address, string Email, string Gender)
        {
            this.FullName = FullName;
            this.Birthday = Utility.ParseDate(Birthday);
            this.Address = Address;
            this.Email = Email;
            this.Gender = Gender;
        }
        public Student(string FullName, DateTime Birthday, string Address, string Email, string Gender)
        {
            this.FullName = FullName;
            this.Birthday = Birthday;
            this.Address = Address;
            this.Email = Email;
            this.Gender = Gender;
        }
        public void input()
        {
            Console.WriteLine("Input Full Name:");
            FullName = Console.ReadLine();
            Console.WriteLine("Input Birthday:");
            Birthday = Utility.ReadDate();
            Console.WriteLine("Input Email:");
            Email = Console.ReadLine();
            Console.WriteLine("Input Address: ");
            Address = Console.ReadLine();
            Console.WriteLine("Input Gender:");
            Gender = Utility.ReadGender();
        }

        public void display()
        {
            Console.WriteLine("Full Name: {0}\n" +
                "Birthday: {1}\n" +
                "Email: {2}\n" +
                "Address: {3}\n" +
                "Gender: {4}", FullName, Birthday, Address, Email, Gender);
        }
    }
}

#Utility.cs

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

namespace FileExImportExport
{
    class Utility
    {
        public static DateTime ReadDate()
        {
            string str = Console.ReadLine();
            DateTime date = new DateTime();
            bool checkConvert()
            {
                try{
                    Convert.ToDateTime(str);
   
                } catch (Exception)
                {
                    return false;
                }
                return true;
            }

            bool checkParse()
            {
                try
                {
                    DateTime.Parse(str);
                }
                catch (Exception)
                {
                    return false;
                }
                return true;
            }

            while(!checkConvert() && !checkParse())
            {
                Console.WriteLine("Please input the right datetime in the following formats:");
                Console.WriteLine("00/00/0000 or 00-00-0000");
                str = Console.ReadLine();
            }
            
            if (checkConvert())
            {
                date = Convert.ToDateTime(str);
            } else if (checkParse())
            {
                date = DateTime.Parse(str);
            }
            return date;
        }
        public static string ReadGender()
        {
            string str = Console.ReadLine();
            while (!Regex.Match(str, @"\b(Male|Female|M|F|m|f|male|female|nam|nu|Nam|Nu)\b").Success)
            {
                Console.WriteLine("Gender input not valid");
                str = Console.ReadLine();
            }
            return str;
        }

        public static DateTime ParseDate(string Date)
        {
            DateTime date = new DateTime();
            bool checkConvert()
            {
                try
                {
                    Convert.ToDateTime(Date);

                }
                catch (Exception)
                {
                    return false;
                }
                return true;
            }

            bool checkParse()
            {
                try
                {
                    DateTime.Parse(Date);
                }
                catch (Exception)
                {
                    return false;
                }
                return true;
            }


            if (checkConvert())
            {
                date = Convert.ToDateTime(Date);
            }
            else if (checkParse())
            {
                date = DateTime.Parse(Date);
            }
            return date;
        }
        public static int ReadInt()
        {
            string str = Console.ReadLine();
            bool check()
            {
                try { int.Parse(str); } catch (Exception) { return false; }
                return true;
            }
            while (!check()) {
                str = Console.ReadLine();
            }
            return int.Parse(str);
        }
    }
}

2021-10-05 17:45:51

#Classroom.cs

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

namespace Ss7.B2
{
    [Serializable]
    class Classroom
    {
        public string Name { get; set; }
        public string Address { get; set; }
        public List<Student> StudentList { get; set; }
        public Classroom()
        {
            StudentList = new List<Student>();
        }
        public Classroom(string name , string address, List<Student> studentList)
        {
            this.Name = name;
            this.Address = address;
            this.StudentList = studentList;
        }
        public void input()
        {
            Console.WriteLine("Enter Name :");
            Name = Console.ReadLine();
            Console.WriteLine("Enter Address :");
            Address = Console.ReadLine();
        }
        public void display()
        {
            Console.WriteLine("Name :{0}, Address :{1}", Name, Address);
            foreach (Student std in StudentList)
            {
                std.display();
            }
        }
    }
}

#Maint.cs

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

namespace Ss7.B2
{
    class Maint
    {
        public static List<Classroom> ClassList = new List<Classroom>();
        static void ShowMenu()
        {
            Console.WriteLine("1.Enter information students from JSON file");
            Console.WriteLine("2.Display all information students ");
            Console.WriteLine("3.Save information another class to file");
        }
        static List<Classroom> ReadFileJSON()
        {
            var content = System.IO.File.ReadAllText(@"data.json");
            //Console.WriteLine(content);
            ClassList = Newtonsoft.Json.JsonConvert.DeserializeObject<List<Classroom>>(content);
            Console.WriteLine("Read File Success");
            return ClassList;
        }
        static void DisplayInf(List<Classroom> ClassList)
        {
            foreach(Classroom c in ClassList)
            {
                c.display();
            }
        }
        static void SaveInfClass()
        {
            foreach (Classroom classroom in ClassList)
            {
                bool append = false;
                using (Stream stream = File.Open(classroom.Name + ".txt", append ? FileMode.Append : FileMode.Create))
                {
                    var binaryFormatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
                    binaryFormatter.Serialize(stream, classroom);
                }
              
                    Console.WriteLine("Save File[" + classroom.Name + "]Success");
            }
        }
        static void ListMenu()
        {
            int choose;
            do
            {
                ShowMenu();
                Console.WriteLine("Enter choose value to ShowMenu :");
                choose = int.Parse(Console.ReadLine());
                switch (choose)
                {
                    case 1:
                        ClassList = ReadFileJSON();
                        break;
                    case 2:
                        DisplayInf(ClassList);
                        break;
                    case 3:
                        SaveInfClass();
                        break;
                    case 4:
                        Console.WriteLine("Exits");
                        return;
                    default:
                        Console.WriteLine("Value must be 1 -> 4");
                        break;
                }
            } while (choose != 4);
        }

        public static void Main(string[] args)
        {
            ListMenu();
        }
    }
}

#Student.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Ss7.Ultitis;


namespace Ss7.B2
{
    [Serializable]
    class Student
    {
        public string FullName { get; set; }
        public DateTime BirthDay { get; set; }
        public string Email { get; set; }
        public string Address { get; set; }
        public string Gender { get; set; }
        public Student()
        {

        }
        public Student(string fullname , DateTime birthday, string email, string address, string gender)
        {
            this.FullName = fullname;
            this.BirthDay = birthday;
            this.Email = email;
            this.Address = address;
            this.Gender = gender;
        }
        public void input()
        {
            Console.WriteLine("Enter FullName :");
            FullName = Console.ReadLine();
            Console.WriteLine("Enter BirthDay :");
            BirthDay = Ultility.ConvertStringToDateTime(Console.ReadLine());
            Console.WriteLine("Enter Email :");
            Email = Console.ReadLine();
            Console.WriteLine("Enter Address :");
            Address = Console.ReadLine();
            Console.WriteLine("Enter Gender :");
            Gender = Console.ReadLine();
        }
        public void display()
        {
            Console.WriteLine("FullName : {0}, BirthDay : {1}, Email : {2}, Address : {3}, Gender : {4}", FullName, BirthDay, Email, Address, Gender);
        }
    }
}

2021-05-29 02:03:18

#ClassRoom.cs

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

namespace bai1536
{
    [Serializable]
    class ClassRoom
    {
        public string ClassName { get; set; }
        public string ClassAddress { get; set; }

        List<Student> studentList = new List<Student>();

        public void input()
        {
            Console.WriteLine("Nhap ten lop: ");
            ClassName = Console.ReadLine();

            Console.WriteLine("Nhap dia chi lop: ");
            ClassAddress = Console.ReadLine();
        }

        public void display()
        {
            Console.WriteLine("Ten lop: {0}, Dia chi lop: {1}", ClassName, ClassAddress);
            foreach(Student std in studentList)
            {
                std.display();
            }
        }
    }
}

#Program.cs

using System;
using bai1536;
using System.Collections.Generic;
using System.IO;

namespace bai1536
{
    class Program
    {
        static void Main(string[] args)
        {
            List<ClassRoom> classList = new List<ClassRoom>();

            int choose;
            do
            {
                ShowMenu();
                choose = Convert.ToInt32(Console.ReadLine());
                switch(choose)
                {
                    case 1:
                        string content = System.IO.File.ReadAllText(@"data.json");
                        classList  = Newtonsoft.Json.JsonConvert.DeserializeObject<List<ClassRoom>>(content);

                        Console.WriteLine("Xong");
                        break;
                    case 2:
                        foreach(ClassRoom classRoom in classList)
                        {
                            classRoom.display();
                        }
                        break;
                    case 3:
                        foreach (ClassRoom classRoom in classList)
                        {
                            using (Stream stream = File.Open(classRoom.ClassName + ".obj", FileMode.Create))
                            {
                                var binaryFormatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
                                binaryFormatter.Serialize(stream, classRoom);
                            }
                        }

                        Console.WriteLine("Luu xong");
                        break;
                    case 4:
                        Console.WriteLine("Thoat");
                        break;
                    default:
                        Console.WriteLine("Nhap lai");
                        break;
                }
            } while (choose != 4);
        }

        private static void ShowMenu()
        {
            Console.WriteLine("1. Nhap thog tin sinh vien tu file json");
            Console.WriteLine("2. Hien thi thong tin sinh vien");
            Console.WriteLine("3. Luu thong tin moi lop hoc vao 1 file ten_lop.obj");
            Console.WriteLine("4. Thoat");
            Console.WriteLine("Moi chon:");

        }
    }
}

#Student.cs

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

namespace bai1536
{
    [Serializable]
    class Student
    {
        public string fullname { get; set; }
        public string birthday { get; set; }
        public string email { get; set; }
        public string address { get; set; }
        public string gender { get; set; }

        public Student() { } 

        public Student (string fullname, string birthday, string email, string address, string gender)
        {
            this.fullname = fullname;
            this.birthday = birthday;
            this.email = email;
            this.address = address;
            this.gender = gender;
        }

        public void input()
        {
            Console.WriteLine("Nhap Ten: ");
            fullname = Console.ReadLine();

            Console.WriteLine("Nhap birthday: ");
            birthday = Console.ReadLine();

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

            Console.WriteLine("Nhap address: ");
            address = Console.ReadLine();

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

        public void display()
        {
            Console.WriteLine("Ten: {0}, Birthday: {1}, Email: {2}, Addresss: {3}, Gender: {4}",
                                fullname, birthday, email, address, gender);
        }

    }
}

2021-05-22 12:36:00

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;

namespace Quanlysinhvien
{
    class Program
    {
        static void Main(string[] args)
        {
            List<ClassRoom> classList = new List<ClassRoom>();
            int lc;
            
            do
            {
                menu();
                Console.WriteLine("Nhap lua chon ");
                lc = Int32.Parse(Console.ReadLine());
                switch (lc) {
                    case 1:
                        String content = System.IO.File.ReadAllText(@"data.json");
                        classList = Newtonsoft.Json.JsonConvert.DeserializeObject<List<ClassRoom>>(content);
                        break;
                    case 2:
                       foreach (ClassRoom c in classList)
                        {
                            c.hienthi();
                        }
                        break;
                    case 3:
                        foreach (ClassRoom cl in classList) {
                            using (Stream stream = File.Open(cl.name + ".obj", FileMode.Create))
                            {
                                var binaryFormatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
                                binaryFormatter.Serialize(stream, cl);
                            }
                        }
                        Console.WriteLine("Da luu xong ! ");
                        break;
                }
            } while (lc <= 3);
        }

      
        public static void them() { 
        
        }

        public static void menu() {
            Console.WriteLine("Nhap thong tin tu file json");
            Console.WriteLine("Hien thi");
            Console.WriteLine("Luu thong tin lop hoc");
            Console.WriteLine("");
        }
    }
}

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

namespace Quanlysinhvien
{
    [Serializable]
    class ClassRoom
    {
        public String name { set; get; }
        public String address { set; get; }
        public List<Student> studentList { set;get; }

        public ClassRoom() {
            studentList = new List<Student>();
        }
        public void nhap()
        {
            Console.WriteLine("Nhap ten lop");
            name = Console.ReadLine();
            Console.WriteLine("Nhap dia chi");
            address = Console.ReadLine();
            Console.WriteLine("Nhap so luong sv" );
            int n = Int32.Parse(Console.ReadLine());
            for (int i = 0; i < n; i++) {
                Student s = new Student();
                s.nhap();
                studentList.Add(s);
            }
        }
        public  void hienthi()
        {
            Console.WriteLine("Ten lop : " + name);
            Console.WriteLine("Ten dia chi : " + address);
            foreach (Student s in studentList) {
                s.hienthi();
            }
        }
    }
}

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

namespace Quanlysinhvien
{
    [Serializable]
    class Student
    {
        public String fullname { set; get; }
        public String birthday { set; get; }
        public String email { set; get; }
        public String address { set; get; }
        public String gender { set; get; }
        
        public Student()
    {
    }
        public Student(String fullname,String email,String address,String gender,String birthday)
        {
            this.fullname = fullname;
            this.email = email;
            this.address = address;
            this.gender = gender;
            this.birthday = birthday;
        }
        public virtual void nhap() {
            Console.WriteLine("Nhap ten sinh vien");
            fullname = Console.ReadLine();
            Console.WriteLine("Nhap ngay sinh");
            birthday = Console.ReadLine();
            Console.WriteLine("Nhap email");
            email = Console.ReadLine();
            Console.WriteLine("Nhap dia chi");
            address = Console.ReadLine();
            Console.WriteLine("Nhap gioi tinh");
            gender = Console.ReadLine();
        }
        public virtual void hienthi()
        {
            Console.WriteLine( fullname + " , " + email + " , " + address + " , " + birthday + " , " + gender );
        }
    }
}

2021-05-21 15:15:39

using System;
using System.Collections.Generic;
using Lesson4.JSON.StudentManager;

namespace Lesson4.JSON.StudentManager
{
    class Test
    {
        static List<ClassRoom> ClassList = new List<ClassRoom>();
        static void Main(string[] args)
        {
            int choose;
            do
            {
                Menu();
                choose = Int32.Parse(Console.ReadLine());
                switch (choose)
                {
                    case 1:
                        ReadData();
                        
                        break;

                    case 2:
                        DisplayData();
                        break;

                    case 3:
                        SaveDataByClass();
                        break;

                    case 4:
                        Console.WriteLine("Exit....");
                        break;
                }
            } while (choose != 4);
        }

        static void Menu()
        {
            Console.WriteLine("1. Dọc dữ liệu từ file data.json và lưu thông tin đọc vào mảng classList");
            Console.WriteLine("2. Hiển thị thông tin lớp học từ mảng classList");
            Console.WriteLine("3. Thực hiện lưu thông tin từng lớp học vào 1 file tương ứng");
            Console.WriteLine("Nhap lua chon choose = ");
        }
        private static void SaveDataByClass()
        {
            foreach (ClassRoom Element in ClassList)
            {   
                string content = Newtonsoft.Json.JsonConvert.SerializeObject(Element.StudentList);
                //Save file text
                string path = Element.Name + ".json";
                System.IO.File.WriteAllText(@path, content);
            }
            Console.WriteLine("Da luu file danh sach hoc sinh tung lop");
        
        }

        private static void DisplayData()
        {
            foreach (ClassRoom Element in ClassList)
            {
                Console.WriteLine("Ten lop: {0}, Dia chi lop: {1}", Element.Name, Element.Address);
                Console.WriteLine("Danh sach Hoc sinh trong lop {0} nhuw sau", Element.Name);
                foreach (Student student in Element.StudentList)
                {
                    student.Display();
                }
            }
        }

        private static void ReadData()
        {
            string content = System.IO.File.ReadAllText(@"student.json");
            List<ClassRoom> list = Newtonsoft.Json.JsonConvert.DeserializeObject<List<ClassRoom>>(content);
            ClassList = list;
            Console.WriteLine("Da doc va lua thong tin");
        }

 
    
}
}

2021-05-21 15:15:23

using System;
using System.Collections.Generic;
using System.Text;
using Lesson4.JSON.StudentManager;

namespace Lesson4.JSON.StudentManager
{
    class ClassRoom
    {
        public string Name { get; set; }
        public string Address { get; set; }

        public List<Student> StudentList { get; set; }

        public ClassRoom() { }

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

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


    }
}

2021-05-21 15:15:06

using System;
using System.Collections.Generic;
using System.Text;
using Lesson4.JSON.StudentManager;
namespace Lesson4.JSON.StudentManager
{
    class Student
    {
        public string FullName { get; set; }

        public string BirthDay { get; set; }
        public string Email { get; set; }
        public string Address { get; set; }

        public string Gender { get; set; }

        public Student() { }

        public Student(string FullName, string Birthday, string Email, string Address, string Gender) {
            this.FullName = FullName;
            this.BirthDay = Birthday;
            this.Email = Email;
            this.Address = Address;
            this.Gender = Gender;
        }

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

            Console.WriteLine("Nhap ngay thang nam sinh MM/DD/YYYY");
            BirthDay = Console.ReadLine();
            //DateTime Birthday = DateTime.ParseExact(str, "d", null);

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

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

            Console.WriteLine("Nhap gioi tinh sinh vien");
            Gender = Console.ReadLine();
        }

        public void Display()
        {
            Console.WriteLine("Ten: {0}, Ngay sinh: {1}, Email {2}, Dia chi {3}, Gioi tinh {4}", FullName, BirthDay, Email, Address, Gender);
        }
    }
}

2021-05-21 10:34:53

#Program

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


namespace Bai1536

{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
            Console.OutputEncoding = Encoding.UTF8;
            List<ClassRoom> classRooms = new List<ClassRoom>();
            int c;
            do
            {
                menu();
                c = int.Parse(Console.ReadLine());
                switch (c)
                {
                    case 1:

                        classRooms = importJSON(classRooms);

                        display(classRooms);
                        break;
                    case 2:


                        display(classRooms);
                        break;
                    case 3:
                        exportJSON(classRooms);
                        break;
                    case 4:
                        Console.WriteLine("Thoat !!");
                        break;

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

            } while (c != 4);

        }
        static List<ClassRoom> importJSON(List<ClassRoom> classRooms)
        {
            var content = File.ReadAllText(@"D:/C#/Less8/Student/data.json");
            classRooms = JsonConvert.DeserializeObject<List<ClassRoom>>(content);


            return classRooms;
        }
        static void display(List<ClassRoom> classRooms)
        {
            foreach (var item in classRooms)
            {
                item.display();
            }
        }
        static void exportJSON(List<ClassRoom> classRooms)
        {
            foreach (ClassRoom classroom in classRooms)
            {


                using (StreamWriter file = File.CreateText(@"d:/C#/Less8/Student/" + classroom.name + ".obj"))
                {
                    JsonSerializer serializer = new JsonSerializer();
                    serializer.Serialize(file, classroom);
                }
            }

            static void menu()
            {
                Console.WriteLine("1. Nhập thông tin sinh viên từ file json (data.json -> xem nội dụng file đc import ở dưới)");
                Console.WriteLine("2. Hiển thị thông tin sinh viên");
                Console.WriteLine("3. Lưu thông tin mỗi lớp học vào 1 file ten_lop.obj");
                Console.WriteLine("4.Thoat");
                Console.WriteLine("Chon : ");
            }



        }
    }

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

namespace Bai1536
{
    class Student
    {
        public string FullName { get; set; }
        public string Email { get; set; }
        public string Birthday { get; set; }
        public string Address { get; set; }
        public string Gender { get; set; }

        public Student(string fullname, string email, string birthday, string address, string gender)
        {
            FullName = fullname;
            Email = email;
            Birthday = birthday;
            Address = address;
            Gender = gender;
        }
        public Student()
        {

        }
        public void input()
        {
            Console.WriteLine("input fullname :");
            FullName = Console.ReadLine();
            Console.WriteLine("input email :");
            Email = Console.ReadLine();
            Console.WriteLine("input birthday :");
            Birthday = Console.ReadLine();
            Console.WriteLine("input address :");
            Address = Console.ReadLine();
            Console.WriteLine("input gender :");
            Gender = Console.ReadLine();
        }
        public void display()
        {
            Console.WriteLine("----Full name : {0} , BirthDay : {1} , Email : {2} , Address : {3} , Gender : {4}", FullName, Birthday, Email, Address, Gender);
        }
    }
}

[
  {
    "name": "T1801A",
    "address": "Detech Building",
    "studentList": [
      {
        "fullname": "Tran Van A",
        "birthday": "01-01-19991",
        "email": "tranvana@gmail.com",
        "address": "Nam Dinh",
        "gender": "Nam"
      },
      {
        "fullname": "Tran Van A",
        "birthday": "01-01-19991",
        "email": "tranvana@gmail.com",
        "address": "Nam Dinh",
        "gender": "Nam"
      },
      {
        "fullname": "Tran Van A",
        "birthday": "01-01-19991",
        "email": "tranvana@gmail.com",
        "address": "Nam Dinh",
        "gender": "Nam"
      }
    ]
  },
  {
    "name": "T1804M",
    "address": "Detech Building",
    "studentList": [
      {
        "fullname": "Tran Van A",
        "birthday": "01-01-19991",
        "email": "tranvana@gmail.com",
        "address": "Nam Dinh",
        "gender": "Nam"
      },
      {
        "fullname": "Tran Van A",
        "birthday": "01-01-19991",
        "email": "tranvana@gmail.com",
        "address": "Nam Dinh",
        "gender": "Nam"
      },
      {
        "fullname": "Tran Van A",
        "birthday": "01-01-19991",
        "email": "tranvana@gmail.com",
        "address": "Nam Dinh",
        "gender": "Nam"
      }
    ]
  }
]

using System;


namespace Bai1536
{
    [Serializable]
    class ClassRoom
    {
        public string Name { get; set; }
        public string Address { get; set; }
        public List<Student> studentList { get; set; }

        public ClassRoom()
        {
            studentList = new List<Student>();
        }
        public void inputClassRoom()
        {
            Console.WriteLine("input nameclass");
            Name = Console.ReadLine();
            Console.WriteLine("input address");
            Address = Console.ReadLine();
            bool ischeck = true;
            Console.WriteLine("input num student");
            Int32 num = Convert.ToInt32(Console.ReadLine());
            for(Int32 i = 1, i <= num , i++)
            {
                Console.WriteLine(i);
                Student st = new Student();
                st.input();
                studentList.Add(st);
            }
            
        }
        public void display()
        {
            Console.WriteLine("NameClass={0},Address={1}", Name, Address);
            foreach (var item in studentList)
            {
                item.display();
            }
        }
    }
}

2021-05-21 10:11:19

#ClassRoom.cs

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

namespace Lesson04
{
    [Serializable]
    class ClassRoom
    {
        public string name { get; set; }
        public string address { get; set; }
        public List<Student> studentList { get; set; }

        public ClassRoom()
        {
            studentList = new List<Student>();
        }

        public void input()
        {
            Console.WriteLine("nhap name: ");
            name = Console.ReadLine();

            Console.WriteLine("nhap address: ");
            address = Console.ReadLine();

            Console.WriteLine("Nhap so sv: ");
            int N = int.Parse(Console.ReadLine());
            for (int i = 0; i < N; i++)
            {
                Student std = new Student();
                std.input();

                studentList.Add(std);
            }
        }

        public void display()
        {
            Console.WriteLine("name: = {0}, address: = {1}", name, address);
            foreach(Student std in studentList)
            {
                std.display();
            }
        } 
    }
}

#Program.cs


using System;
using System.Collections.Generic;
using System.IO;
namespace Lesson04
{
    class Program
    {
        static void Main(string[] args)
        {
            int choose;
            List<ClassRoom> classList = new List<ClassRoom>();

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

                switch(choose)
                {
                    case 1:
                        Import(classList);
                        break;
                    case 2:
                        Display(classList);
                        break;
                    case 3:
                        Save(classList);
                        break;
                    case 4:
                        Environment.Exit(0);
                        break;
                    default:
                        Console.WriteLine("Fail!");
                        break;
                }
            } while (choose != 4);

            
        }
        static void Import(List<ClassRoom> classList) 
        {
            var content = System.IO.File.ReadAllText(@"data.json");
            Console.WriteLine(content);

            classList = Newtonsoft.Json.JsonConvert.DeserializeObject<List<ClassRoom>>(content);
            Display(classList);
        }
        
        static void Display(List<ClassRoom> classList)
        {
            foreach(ClassRoom classroom in classList)
            {
                classroom.display();
            }
        }

        static void Save(List<ClassRoom> classList)
        {
            foreach(ClassRoom classroom in classList)
            {
                using (Stream stream = File.Open(classroom.name+".obj", FileMode.Create))
                {
                    var binaryFormatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
                    binaryFormatter.Serialize(stream, classroom);
                } 
            }
        }

        static void showMenu()
        {
            Console.WriteLine("1.Nhap du lieu");
            Console.WriteLine("2.Hien thi thong tin");
            Console.WriteLine("3.Luu");
            Console.WriteLine("4.Thoat");
            Console.WriteLine("Chon: ");
        }
    }
}

#Student.cs

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

namespace Lesson04
{
    [Serializable]
    class Student
    {
        public string fullname { get; set; }
        public string birthday { get; set; }
        public string email { get; set; }
        public string address { get; set; }
        public string gender { get; set; }

        public Student() { }

        public Student(string fullname, string birthday, string email, string address, string gender)
        {
            this.fullname = fullname;
            this.birthday = birthday;
            this.email = email;
            this.address = address;
            this.gender = gender;
        }

        public void input()
        {
            Console.WriteLine("nhap fullname: ");
            fullname = Console.ReadLine();

            Console.WriteLine("nhap birthday: ");
            birthday = Console.ReadLine();

            Console.WriteLine("nhap email: ");
            email = Console.ReadLine();

            Console.WriteLine("nhap address: ");
            address = Console.ReadLine();

            Console.WriteLine("nhap gender: ");
            gender = Console.ReadLine();
        }

        public void display()
        {
            Console.WriteLine("fullname: = {0}, birthday: = {1}, email: = {2}, address: = {3}, gender: = {4}",
                                                                            fullname, birthday, email, address, gender);
        }
    }
}