savefile.cs

savefile.cs

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

namespace _20180421_student_list
{
    public partial class frmstd : Form
    {
        public frmstd()
        {
            InitializeComponent();
        }

        void test()
        {
            if (File.Exists("Studentslist.txt"))
            {
                FileStream F = new FileStream("Studentslist.txt", FileMode.Create);
            }
            else
            { FileStream F = new FileStream("Studentslist.txt", FileMode.Append); }
        }

        private void btnsave_Click(object sender, EventArgs e)
        {
            if (File.Exists("Studentslist.txt"))
            {
                string data = "";
                StreamWriter sw = new StreamWriter("Studentslist.txt", true, Encoding.Unicode);
                data = 1 + "*" + txtname.Text + "*" + txtph.Text + "*" + txtemail.Text + "*" + txtadd.Text;
                txttest.Text = data;
                txttest.Enabled = true;
                sw.WriteLine(data);
                sw.Close();
            }

        }

        private void btnReadData_Click(object sender, EventArgs e)
        {
            lstData.Items.Clear();
            string data = "";
            StreamReader sr = new StreamReader("Studentslist.txt", Encoding.Unicode, true);
            while ((data = sr.ReadLine())!=null )
            {
               
                lstData.Items.Add(data);
            }
            sr.Close();
        }

        private void lstData_SelectedIndexChanged(object sender, EventArgs e)
        {
            string data = lstData.SelectedItem.ToString();
            string[] results = data.Split('*');
            
            txtname.Text = results[1];
            txtph.Text = results[2];
            txtemail.Text = results[3];
            txtadd.Text = results[4];

        }
    }
}