laba1.cs

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

namespace Student_nagruzka
{
    public abstract class FileHanlder
    {
        private string FileName;
        private string CustomDirectory;
        public FileHanlder(string fileName)
        {
            this.FileName = fileName;
            this.CustomDirectory = "C:";
        }
        public string[] ExtractData()
        {
            OpenFile();
            return ReadData();
        }
        public void WriteData()
        {
            OpenFile();
            PrependData();
        }
        public abstract void PrependData();
        public abstract void OpenFile();
        public abstract string[] ReadData();
        public int MyProperty { get; set; }
    }

    class TXTHandler : FileHanlder
    {
        public TXTHandler(string fileName) : base (fileName) { }
        public override void OpenFile() { }
        public override void PrependData()
        {
            throw new NotImplementedException();
        }
        public override string[] ReadData()
        {
            // System.IO.StreamReader file = new System.IO.StreamReader(@"C:\Users\Dmitry Shamritsky\source\repos\Student_nagruzka\Student_nagruzka\data.txt");
            try
            {
                string[] lines = File.ReadAllLines(@"C:/Users/Dmitry Shamritsky/source/repos/Student_nagruzka/Student_nagruzka/data.txt.txt");
                return lines;
            }
            catch (Exception)
            { 
                throw;
            }  
        }
        public int MyProperty { get; set; }
    }

    class CSVHandler : FileHanlder
    {
        public CSVHandler(string fileName) : base(fileName) { }
        public override void OpenFile()
        {
            throw new NotImplementedException();
        }

        public override void PrependData()
        {
            throw new NotImplementedException();
        }

        public override string[] ReadData()
        {
            throw new NotImplementedException();
        }

        public override string ToString()
        {
            return base.ToString();
        }
    }

    class PDFhandler : FileHanlder
    {
        public PDFhandler(string fileName) : base(fileName) { }
        public override void OpenFile()
        {
            throw new NotImplementedException();
        }

        public override void PrependData()
        {
            throw new NotImplementedException();
        }

        public override string[] ReadData()
        {
            throw new NotImplementedException();
        }

        public override string ToString()
        {
            return base.ToString();
        }
    }

    class Subject : IComparable
    {
        private string SubjectName;
        private int StudyHours;
        private int LectureHours;
        private int HomeWorkHours;
        private int LaboratoryHours;
        private string SubjectTeacherName;

        public Subject(string SubjectName, int StudyHours, int LectureHours, int HomeWorkHours, int LaboratoryHours, string SubjectTeacherName)
        {
            this.SubjectName = SubjectName;
            this.StudyHours = StudyHours;
            this.LectureHours = LectureHours;
            this.HomeWorkHours = HomeWorkHours;
            this.LaboratoryHours = LaboratoryHours;
            this.SubjectTeacherName = SubjectTeacherName;
        }
        //public string Properties { get; set; }
        public string name     { get => this.SubjectName; }
        public int study_hours { get => this.StudyHours; }
        public int lect_hours  { get => this.LectureHours; }
        public int home_hours  { get => this.HomeWorkHours; }
        public int labo_hours { get => this.LectureHours; }
        public string teacher { get => this.SubjectTeacherName; }
        public string getSubjectName()
        {
            return this.SubjectName;
        }

        public int CompareTo(object o)
        {
            Subject comparable = o as Subject;
            if (comparable != null)
                return this.SubjectName.CompareTo(comparable.SubjectName);
            else
                throw new Exception("Imposible to compare!");
        }
        public override string ToString() => this.SubjectName + " | " + this.StudyHours + " | " + this.LectureHours + " | " + this.HomeWorkHours + " | " + this.LaboratoryHours + " | " + this.SubjectTeacherName;
    }

    class Program
    {
        public static string PATH = "C:/Users/Dmitry Shamritsky/source/repos/Student_nagruzka/Student_nagruzka/data.txt.txt";
        static void Main(string[] args)
        {
            TXTHandler txtHandler = new TXTHandler(PATH);
            List<Subject> SubjectList = PrepareDataForUsege();
            while (true) {
                switch (Menu()) {
                    case 1: Additional(SubjectList); break;
                    case 2: Deletions(SubjectList); break;
                    case 3: FindRecord(SubjectList); break;
                    case 4: ShowList(SortRecords(SubjectList)); break;
                    case 5: ShowList(SubjectList); break;
                    case 6: return;
                }
            }
            WriteData(SubjectList);
            return;
        }
        static public void ShowList(List<Subject> subjects)
        {
            int i = 1;
            foreach(Subject subject in subjects)
            {
                Console.WriteLine(i + " - " + subject.ToString());
                i++;
            }
        }
        static public void Additional(List<Subject> list_to_add) {
            int study_hours, lecture_hours, homework_hours, laboratory_hours;
            string subject_name, subject_teacher_name;
            Console.Clear();
            Console.WriteLine("Add subject name:");
            subject_name = Console.ReadLine();
            Console.WriteLine("Add study hours: ");
            try
            {
                study_hours = Int32.Parse(Console.ReadLine());
            }
            catch (FormatException)
            {
                Console.WriteLine("Imposible to convert");
                throw;
            }
            Console.WriteLine("Add lecture hours: ");
            try
            {
                lecture_hours = Int32.Parse(Console.ReadLine());
            }
            catch (FormatException)
            {
                Console.WriteLine("Imposible to convert");
                throw;
            }
            Console.WriteLine("Add homw work hours: ");
            try
            {
                homework_hours = Int32.Parse(Console.ReadLine());
            }
            catch (FormatException)
            {
                Console.WriteLine("Imposible to convert");
                throw;
            }
            Console.WriteLine("Add laboratory hours: ");
            try
            {
                laboratory_hours = Int32.Parse(Console.ReadLine());
            }
            catch (FormatException)
            {
                Console.WriteLine("Imposible to convert");
                throw;
            }
            Console.WriteLine("Add subject teacher name hours: ");
            subject_teacher_name = Console.ReadLine();

            list_to_add.Add(new Subject(subject_name, study_hours, lecture_hours, homework_hours, laboratory_hours, subject_teacher_name));
            return;
        }
        static public void Deletions(List<Subject> SubjectList) {
            Console.WriteLine("Choose what to delete and enter index + enter");
            ShowList(SubjectList);
            int index_to_delete;
            try
            {
                index_to_delete = Int32.Parse(Console.ReadLine());
                if (index_to_delete > SubjectList.Count)
                {
                    Console.WriteLine("Fuck you");
                }
                else
                {
                    SubjectList.RemoveAt(index_to_delete - 1);
                }
            }
            catch (FormatException)
            { 
                throw;
            }
        }
        static public void FindRecord(List<Subject> list) {
            Console.Clear();
            Console.WriteLine("Will search by name, so enter search pattern: \n");
            string searchPattern = Console.ReadLine();

            Subject SerchResult = list.Find(item => item.name == searchPattern);
            Console.Clear();
            SerchResult.ToString();

            //string result = myList.Single(s => s == search);
        }
        static public List<Subject> SortRecords(List<Subject> subjectList) { 
            subjectList.Sort();
            return subjectList;
        }
        static public void WriteData(List<Subject> Subjectlist)
        {
            List<string> linesToWrite = new List<string>();
            foreach (Subject subject in Subjectlist)
            {
                linesToWrite.Add(subject.name + " | " + subject.study_hours + " | " + subject.lect_hours + " | " + subject.home_hours + " | " + subject.labo_hours + " | " + subject.teacher);
            }
            string[] s_array = linesToWrite.ToArray();
            File.WriteAllLines(PATH, s_array, Encoding.UTF8);
            return;
        }

        static public List<Subject> PrepareDataForUsege()
        {
            TXTHandler txtHandler = new TXTHandler(PATH);
            string[] list = txtHandler.ExtractData();
            List<Subject> SubjectList = new List<Subject>();
            string subject_name, teacher_name;
            int study_hours, lecture_hours, home_hours, labs_hours;
            if (new FileInfo(PATH).Length == 0)
            {
                return new List<Subject>();
            }
            else
            {
                foreach (string line in list)
                {
                    string[] fields = line.Split(" | ");
                    subject_name = fields[0];
                    study_hours = Int32.Parse(fields[1]);
                    lecture_hours = Int32.Parse(fields[2]);
                    home_hours = Int32.Parse(fields[3]);
                    labs_hours = Int32.Parse(fields[4]);
                    teacher_name = fields[5];

                    Subject obj = new Subject(subject_name, study_hours, lecture_hours, home_hours, labs_hours, teacher_name);

                    SubjectList.Add(obj);

                }
                return SubjectList;
            }
        }

        static int Menu()
        {
            Console.WriteLine(" ----------------- MENU -----------------");
            Console.WriteLine("1. Add subject information");
            Console.WriteLine("2. Delete records");
            Console.WriteLine("3. Find Record");
            Console.WriteLine("4. Sort and show Records");
            Console.WriteLine("5. Show all records");
            Console.WriteLine("6. Exit");
            Console.WriteLine(" ----------------------------------------");
            return Int32.Parse(Console.ReadLine());
        }
    }
}