Generate barcode with Free 3 of 9 font

Question

public Bitmap CreateBarcode(string data)
{
    data = "55536"; 
    string barcodeData = "*" + data + "*";
    Bitmap barcode = new Bitmap(1, 1);
    Font threeOfNine = new Font("Free 3 of 9 Extended", 31, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);

    Font arial = new Font("Arial", 13,
              System.Drawing.FontStyle.Regular,
              System.Drawing.GraphicsUnit.Point);

    Graphics graphics = Graphics.FromImage(barcode);
    SizeF dataSize = graphics.MeasureString(barcodeData, threeOfNine);
    dataSize.Height = 70;

    barcode = new Bitmap(barcode, dataSize.ToSize());
    graphics = Graphics.FromImage(barcode);

    graphics.Clear(Color.White);
    graphics.TextRenderingHint = TextRenderingHint.SingleBitPerPixel;

    graphics.DrawString(barcodeData, threeOfNine, new SolidBrush(Color.Black), 0, 0);

    graphics.DrawString(data, arial, new SolidBrush(Color.Black), 50, 40);

    graphics.Flush();

    threeOfNine.Dispose();
    graphics.Dispose();

    return barcode;
}

I generate barcode with the above code, but my scanner can not read the barcode generated (for 55536). BUT if I switch the data value to "1111" or "2222", then the barcode be read very well. so I think it is not a scanner problem, anybody know, what's the wrong with that code? please advice.

Answer 1

If you are using only numbers, you could try the 3 of 9 basic font (without the extended). Print the same barcode from Write and compare them to see if your solution is building the complete barcode or if it is getting truncated.