using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace BungetPetru
{
    public partial class Form1 : Form
    {
        public static int id = 0;
        public static float sum = 0;
        private List<Electrocasnice> electrocasnice = new List<Electrocasnice>();

        public Form1()
        {
            InitializeComponent();
            citire_fiser();
        }
        public void Update_listBox()
        {
            listBox1.Items.Clear();
            foreach(Electrocasnice item in electrocasnice)
            {
                AparatFoto af = (AparatFoto)item;
                string text = af.toFileString();

                listBox1.Items.Add(text);
            }
        }

        public void citire_fiser()
        {
            string path = "electrocasnice.txt";
            StreamReader sr = new StreamReader(path);
            try
            {


                string line = "";
                while ((line = sr.ReadLine()) != null)
                {
                    string[] el = line.Split(';');

                    DateTime date = Convert.ToDateTime(el[2]);
                    DateTime newDate = new DateTime(date.Year, date.Month, date.Day);

                    AparatFoto af = new AparatFoto(el[1], newDate, (float)Convert.ToDouble(el[4]), Convert.ToInt32(el[5]), el[3]);
                    electrocasnice.Add(af);
                }

                sr.Close();
                Update_listBox();

            }
            catch(Exception ex)
            {
                sr.Close();
            }
            Update_listBox();
        }
        public void adaugare_fisier(string text)
        {
            string path = "electrocasnice.txt";
            StreamWriter sw = new StreamWriter(path, true);

            sw.WriteLine(text);
            sw.Close();
        }
        public void stergere_fisier(string id)
        {
            string path = "electrocasnice.txt";
            StreamReader sr = new StreamReader(path);
            string line = "";
            string newText = "";

            string[] arr = new string[100];
            int ind = 0;
            while ((line = sr.ReadLine()) != null)
            {

                if (line.Split(';')[0] == id)
                {
                    //newText += "\n";
                    //continue;
                }
                else
                {
                    //newText += "\n";
                    //newText += line;
                    arr[ind++] = line;
                }
            }
            sr.Close();
            try
            {
                StreamWriter sw = new StreamWriter("electrocasnice.txt");
                //sw.WriteLine(newText);

                for (int j = 0; j < arr.Length; j++)
                {
                    sw.WriteLine(arr[j]);
                }
                sw.Close();
            }
            catch (Exception ex)
            {

            }


        }
        private void buttonAdaugare_Click(object sender, EventArgs e)
        {
            try
            {
                string denumire = textBoxDenumire.Text;
                DateTime data = dateTimePicker.Value;
                int stoc = Convert.ToInt32(textBoxStoc.Text);
                float pret = (float)Convert.ToDouble(textBoxPret.Text);
                string tip = comboBoxTip.Text;

                AparatFoto af = new AparatFoto(denumire, data, pret, stoc, tip);

                electrocasnice.Add(af);


                Update_listBox();


                string text = af.toFileString();
                adaugare_fisier(text);
            }
            catch
            {
                //MessageBox.Show("Adaugare esuata!");
            }
        }

        class CompararePret : IComparer<AparatFoto>
        {
            public int Compare(AparatFoto x, AparatFoto y)
            {
                if (x.getPret() > y.getPret()) { return 1; }
                else if (x.getPret() < y.getPret()) { return -1; }
                else return 0;
            }
        }

        class ComparareStoc : IComparer<AparatFoto>
        {
            public int Compare(AparatFoto x, AparatFoto y)
            {
                if (x.getStoc() > y.getStoc()) { return 1; }
                else if (x.getStoc() < y.getStoc()) { return -1; }
                else return 0;
            }
        }

        private void buttonOrdonare_Click(object sender, EventArgs e)
        {
            List<AparatFoto> aparate = new List<AparatFoto>();
            foreach(Electrocasnice el in electrocasnice)
            {
                aparate.Add((AparatFoto)el);
            }
            if(checkBoxPret.Checked)
            {
                aparate.Sort(new CompararePret());

                listBox2.Items.Clear();
                foreach (AparatFoto item in aparate)
                {
                    listBox2.Items.Add(item.toFileString());
                }
            }
            if (checkBoxStoc.Checked)
            {
                aparate.Sort(new ComparareStoc());

                listBox2.Items.Clear();
                foreach (AparatFoto item in aparate)
                {
                    listBox2.Items.Add(item.toFileString());
                }
            }
        }

        private void buttonVanzare_Click(object sender, EventArgs e)
        {
            string line = listBox1.SelectedItem.ToString();
            string[] el = line.Split(';');
            int index = 0;

            foreach(Electrocasnice item in electrocasnice)
            {
                if (item.getId() == el[0])
                {
                    index = electrocasnice.IndexOf(item);
                    AparatFoto af = (AparatFoto)item;
                    sum += af.getPret();
                }
            }

            electrocasnice.RemoveAt(index);
            stergere_fisier(el[0]);
            Update_listBox();
        }

        private void buttonTotalVanzari_Click(object sender, EventArgs e)
        {
            textBox1.Text = sum.ToString();
        }

    }
}


==========================================


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace BungetPetru
{
    public partial class LoginForm : Form
    {

        public LoginForm()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {

            timer1.Tick += Timer1_Tick;
            timer1.Interval = 100;


            StreamReader sr = new StreamReader("users.txt");
            String line = "";
            while ((line = sr.ReadLine()) != null)
            {
                string[] el = line.Split(';');
                string username = el[0];
                string password = el[1];

                if ((textBox1.Text == username) && textBox2.Text == password)
                {

                    progressBar1.Minimum = 0;
                    progressBar1.Maximum = 20;
                    progressBar1.Value = 0;


                    timer1.Start();
                }
            }
            sr.Close();
         }

        private void Timer1_Tick(object sender, EventArgs e)
        {
            if(progressBar1.Value < progressBar1.Maximum)
            {
                progressBar1.Value++;
            }
            if (progressBar1.Value == progressBar1.Maximum)
            {
                timer1.Stop();
                this.Hide();
                Form1 f = new Form1();
                //f.Activate();
                f.Show();
            }
        }
    }
}