Sequential Text Fiels and Array

[bravo659]

Seems to me that i am weak in loops and arrays. School project need to advise that. My assignment is to write and read to a text file. I can write to the text file using streamwriter and streamreader and to append text I used the "Employee.txt", true in order to append to future data. I also used the openFileDialog to retrieve and display data to the textboxes. It will not display data but render a NullReference Exception pointing to the .Peek();. I used this method to display in another program it worked great but will not work in this program.

I have an array to limit 10 entries to the text file if exceeds and exception will occur that only 10 records are allowed then close the dialog.

I also suppose to calculate the hoursworked >40 * 1.5 * PayRate now I can't think of a way to do this becaause it has to pass through the array in a loop to get the pay and text to be displayed.
Can you help.
This is my intermediate class and can't understand this concept.
I also attached the file with the form so you could see the program.
I appreciate for your assistance.

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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 DesiBravo_IT274_Unit6
{
    public partial class Form1 : Form
    {
        private StreamReader employeeStreamReader;

        string[] employeeData = new string[10];
        int indexInteger;

        public Form1()
        {
            InitializeComponent();
        }

        StreamWriter employeeStreamWriter = new StreamWriter("Employee.txt", true);

        private void btnSave_Click(object sender, EventArgs e)
        {

            employeeStreamWriter.WriteLine(txtFirstName.Text);
            employeeStreamWriter.WriteLine(txtLastName.Text);
            employeeStreamWriter.WriteLine(txtPayRate.Text);

            try
            {
                employeeData[indexInteger++] = txtFirstName.Text;
                employeeData[indexInteger++] = txtLastName.Text;
                employeeData[indexInteger++] = txtPayRate.Text + "\n ";
            }
            catch (Exception)
            {
                MessageBox.Show("You can only save 10 records...", "Data Error");
            }


            txtFirstName.Clear();
            txtFirstName.Focus();
            txtLastName.Clear();
            txtPayRate.Clear();          

        }

        private void closeToolStripMenuItem_Click(object sender, EventArgs e)
        {
            employeeStreamWriter.Close();
            this.Close();

        }

        private void btnNext_Click(object sender, EventArgs e)
        {
            Display();
        }

        private void openToolStripMenuItem_Click(object sender, EventArgs e)
        {
            DialogResult responseDialogResult;

            openFileDialog1.InitialDirectory = Directory.GetCurrentDirectory();

            responseDialogResult = openFileDialog1.ShowDialog();

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            try
            {
                employeeStreamReader = new StreamReader("Employee.txt");
                Display();
            }
            catch
            {
                MessageBox.Show("File does not exist.");
            }


        }
        private void Display()
        {
            if (employeeStreamReader.Peek() != -1)
            {
                txtFirstName.Text = employeeStreamReader.ReadLine();
                txtLastName.Text = employeeStreamReader.ReadLine();
                txtPayRate.Text = employeeStreamReader.ReadLine();
            }
        }

        
    }
    }
        
    }