Need to generate this Barcode (see attached)

[John Geshrick]

Gang, I need to replicate the barcode attached here. What settings, options do I need for ZXing to generate this barcode.

[Bas Vijfwinkel]

On Tuesday, May 2, 2017 at 2:45:08 AM UTC+9, John Geshrick wrote:
> Gang, I need to replicate the barcode attached here. What settings, options do I need for ZXing to generate this barcode.

It seems to be some proprietary format.
It's not standard format because none of the barcode readers I tried seem to recognise it.

Looking at the lines, it is a UPC code but they probably made some small changes so that the barcodes cannot be read with standard UPC readers.
For example, if the contents of the barcode is made in such a way that it always fails the parity check, then it will never be accepted by a standard reader.

[John Geshrick]

Bas,

I was calculating checksum incorrectly.  Below is what I had to do to get it to work:

        static string CalcCheckSum(string code)

        {

            int[] check_digits = { 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3 };

            int sumDigits = 0;

            for (int i = 0; i < code.Length; i++)

            {

                int iDigit = int.Parse(code.Substring(i, 1));

                sumDigits += (iDigit * check_digits[i]);

            }

            int modCheck = ((10 - (sumDigits % 10)) % 10);

            return modCheck.ToString();

        }

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[Lachezar Dobrev]

If we take into consideration the possible Check Sum discrepancy
this looks like an UPC code.
Indeed if we correct the check-sum the bar-code should be
'210217010994', and then encode the contents using ZXing Command Line
Encoder [1] we get the attached image, which differs from the example
only by the third line from the right: the line is thin, while in the
original image it is wide.
Did *you* calculate the wrong check sum, and did you do it on
purpose, or by mistake? If that's an honest mistake you can use ZXing
Encoder to generate UPC bar-codes, but the styling (additional text
and digits) is up to you.

[1] https://github.com/zxing/zxing/blob/master/javase/src/main/java/com/google/zxing/client/j2se/CommandLineEncoder.java

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