why do my elements = 0 after inputting a number into array?

Question

I'm trying to learn arrays and I cannot understand why after inputting all my arrays when I get it to show in my text box it says that they are all 0 ?

Here is my code

    public Form1()
    {
        InitializeComponent();
    }
    int[] a = new int[10]; //global int!!!

    private void textBox1_TextChanged(object sender, EventArgs e)
    {

    }

    private void btn_Enter_Click(object sender, EventArgs e)
    {
        //all elements show as 0 but why ??? come back to this later tonight!


        string input;

        for (int place = 0; place < 10; place++)
        {
             input = null;

             My_Dialogs.InputBox("User Input Request!", "Please enter a number to be stored in element " + place + " : ", ref input);
    Int32.TryParse(input, out a[place]);

        }
    }

    private void btn_display_Click(object sender, EventArgs e)
    {
        for (int place = 0; place < 10; place++)
             textBox1.AppendText("Element" + place + " of the array contains " + a[place] + "\n");
    }

    private void btn_quit_Click(object sender, EventArgs e)
    {
        Close();
    }

Here is the mydialogs code

class My_Dialogs
{
    public static string InputBox(string promptText)
    {
        string default_value = "";

        return InputBox("", promptText, ref default_value);
    }
    public static string InputBox(string title, string promptText)
    {
        string default_value = "";

        return InputBox(title, promptText, ref default_value);
    }
    public static string InputBox(string title, string promptText, ref string value)
    {
        Form form = new Form();
        Label label = new Label();
        TextBox textBox = new TextBox();
        Button buttonOk = new Button();
        Button buttonCancel = new Button();

        form.Text = title;
        label.Text = promptText;
        textBox.Text = value;

        buttonOk.Text = "OK";
        buttonCancel.Text = "Cancel";
        buttonOk.DialogResult = DialogResult.OK;
        buttonCancel.DialogResult = DialogResult.Cancel;

        label.SetBounds(9, 20, 372, 13);
        textBox.SetBounds(12, 36, 372, 20);
        buttonOk.SetBounds(228, 72, 75, 23);
        buttonCancel.SetBounds(309, 72, 75, 23);

        label.AutoSize = true;
        textBox.Anchor = textBox.Anchor | AnchorStyles.Right;
        buttonOk.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
        buttonCancel.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;

        form.ClientSize = new Size(396, 107);
        form.Controls.AddRange(new Control[] { label, textBox, buttonOk, buttonCancel });
        form.ClientSize = new Size(Math.Max(300, label.Right + 10), form.ClientSize.Height);
        form.FormBorderStyle = FormBorderStyle.FixedDialog;
        form.StartPosition = FormStartPosition.CenterScreen;
        form.MinimizeBox = false;
        form.MaximizeBox = false;
        form.AcceptButton = buttonOk;
        form.CancelButton = buttonCancel;

        if (form.ShowDialog() == DialogResult.Cancel)
        {
            textBox.Text = "";
        }
        return textBox.Text;
    }
}

}

////////////////////////////////////////////////////////////////////////////

Answer 1

EDIT You need to add the following to your MyDialog class right before the return statement:

value = textBox.Text;

This works just fine for me: (assuming the input is in fact an int.)

Without knowing whats in My_Dialogs.InputBox Its hard to tell what the problem is. What is the value of input immediately following the dialog box?

class Program
    {
        private static int[] a = new int[10]; //global int!!!
        static void Main(string[] args)
        {
            for (int place = 0; place < a.Length; place++)
            {
                Console.WriteLine("Please enter a number to be stored in element " + place + " : ");
                var input = Console.ReadLine();
                Int32.TryParse(input, out a[place]);
            }

        }
    }

Answer 2

Are you sure you got this code for the inputbox from your instructor? It never assigns the inserted text to value thus your input variable will always be null. You should either insert

value = textBox.Text;

in your InputBox code

or use

input = My_Dialogs.InputBox("User Input Request!", "Please enter a number to be stored in element " + place + " : ");

Furthermore you should check the result of TryParse if the conversion succeeded.