C# text box printing Issues

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C#

.NET

.NET4

private void printReceipt()
{
    printDialog.Document = printDocument;

    DialogResult result = printDialog.ShowDialog();

    if (result != DialogResult.OK) return;
    try
    {
        sPrint = new StreamReader(
                 new MemoryStream(
                     Encoding.ASCII.GetBytes(richTextBoxResult.Text)));

        printDocument.PrintPage += new PrintPageEventHandler(printDocument_PrintPage);

        printDocument.Print();
    }
    catch (Exception e)
    {
        MessageBox.Show("Failed to print \n" + e.Message);

    }
    finally
    {
        if (sPrint != null)
            sPrint.Close();
    }
}

void printDocument_PrintPage(object sender, PrintPageEventArgs e)
{
    // No of lines that fit on to the page
    float linesPerPage = e.MarginBounds.Height / richTextBoxResult.Font.GetHeight(e.Graphics);

    float fontHeight = richTextBoxResult.Font.GetHeight(e.Graphics);

    for (int count = 0; count < linesPerPage && !sPrint.EndOfStream; count++)
    {
        e.Graphics.DrawString(sPrint.ReadLine(),
            richTextBoxResult.Font,
            Brushes.Black,
            e.MarginBounds.Left,
            e.MarginBounds.Top + (count * fontHeight),
            new StringFormat());
    }
    e.HasMorePages = !sPrint.EndOfStream;

}

My questions:-

1. I need to fit all textbox content correctly when I print. (Lengthy single row not printed, rather jumped outside of the page)

2. Are there any possibilities to enable print range option under print Menu? (On output GUI, Let's say i have text content which can fit on more than one page)


Please help.
Thank You.