Code generated prints come out blank on paper!

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C#

Hi all,

I've been trying to figure out why my program only prints blank pages!

I use VS2010 with C# WPF. The program itself does not crash or throw any error, but it goes through the motions of printing what's in the textBox.
I don't really know what I'm missing here, I've looked at some examples in books, web, etc... but no avail!

I would welcome any suggestions if any.

Here's the printing part of the code:

private void printNumberList(object sender, RoutedEventArgs e)
{
    PrintDocument textPrintPage = new PrintDocument();
    PrintDialog textPrintPreviewDialog = new PrintDialog();

    if (textPrintPreviewDialog.ShowDialog() == true)
       {
          textPrintPage.Print();
       }
    }

private void textPrintPage_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
            int x = e.MarginBounds.Left;
            int y = e.MarginBounds.Top;
            using (Font font = new Font("Times New Roman", 20))
         {

            string [] lines = new string[25];
            for (int i = 0; i< lines.Length-1; i++)
            {
                lines[i] = dataFileText.GetLineText(i);
            }

          e.Graphics.DrawString("List of numbers", font, Brushes.Black, x, y + 20);
          y += 40;

             for (int i = 0; i < lines.Length - 1; i++)
             {
                    e.Graphics.DrawString(lines[i], font, Brushes.Black, x, y);
                    y += 30;
             }

           }
            e.HasMorePages = false;

        }