StreamReader and Writer from a list box

Question

Question 1: whatever the user enters in the text box displays in the listbox but other text is showing up first then what the user enters shows up at the end.

Question 2: my StreamReader / StreamWriter I keep getting 1601 error code to new to C# so I don't know all the terms.

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

namespace foodOrderApp
{
    public partial class Form1 : Form
    {
        public Form1()
        {
             InitializeComponent();
             //textDialog = new SaveFileDialog();
             //textDialog.Filter = ""
        }

        private void addToListButton_Click(object sender, EventArgs e)
        {
            if (!System.Text.RegularExpressions.Regex.IsMatch(foodText.Text, "^[a-zA-Z]"))
            {
                MessageBox.Show("This textbox only accepts alphebetical characters");
            }
            else
            {
                displayFoodOrder.Items.Add(foodText.ToString());
            }
        }

        private void loadButton_Click(object sender, EventArgs e)
        {
            if (loadButton.ShowDialog() == DialogResult.OK)
            {
                StreamWriter sw = new StreamWriter(
                                    new FileStream(loadButton.FileName,
                                        FileMode.Create,
                                        FileAccess.ReadWrite)
                                    );

                sw.WriteLine(displayFoodOrder.Text);

                sw.Close();
            }
        }

        private void saveOrder_Click(object sender, EventArgs e)
        {
            if (saveOrder.ShowDialog() == DialogResult.OK)
            {
                StreamReader sr = new StreamReader(
                                new FileStream(saveOrder.FileName,
                                    FileMode.Open,
                                    FileAccess.Read)
                                    );

            }//end if
        }
    }
}

Error:

CS1061 'Button' does not contain a definition for 'FileName' and no extension method 'FileName' accepting a first argument of type 'Button' could be found (are you missing a using directive or an assembly reference?)
line 42

Answer 1

I don't really understand your first question, what other text shows up first?

For your second question, there are actually other problems I think you have. Firstly you are using:

if (loadButton.ShowDialog() == DialogResult.OK)

and

if (saveOrder.ShowDialog() == DialogResult.OK)

From what I can tell, these are buttons you are clicking, which won't have a ShowDialog method.

The error you are actually looking at is due to you trying to get a FileName property from what I still suspect are buttons (and backed up by the error message - 'Button' does not contain a definition for 'FileName'):

loadButton.FileName

and

saveOrder.FileName

---

I'm suspicious what you are actually supposed to be using are OpenFileDialog and SaveFileDialog controls, but you've actually referenced the buttons you're clicking on instead.

Answer 2

I believe Jonno is correct with the about the SaveFileDialog and OpenFileDialog. When the save or load button are clicked you should open one of those dialogs and wait for its result. Then on its okay you can do SomeFileDialog.FileName instead of loadButton.FileName

Your first question is (if I interpreted it correctly) that you see the stuff + what the user entered.

This is because you are doing

displayFoodOrder.Items.Add(foodText.ToString());

instead try

displayFoodOrder.Items.Add(foodText.Text);

You are ToString-ing the whole control and not just the text in its text field.

Also, as a side note, your regex is matching the first character because of the ^ and not all characters. You can use . if you want any character to be [a-zA-Z]