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troubleshooting Question

Calculate checksum for Ean13 barcode number

Avatar of Peter Nordberg
Peter NordbergFlag for Sweden asked on
.NET ProgrammingASP.NETVisual Basic.NET
13 Comments1 Solution2569 ViewsLast Modified:
Hi experts,

I would like to calculate the checksum of a Ean13 barcode in my webapplication. I'm not sure how to accomplish this in code, but I have the instructions to do so:

Exempel: EAN13

7 3 0 0 0 1 1 0 0 0 0 1K

1.Sum every second number from right:. 1+0+0+1+0+3=5
2. Multiply the sum with the number 3.    5 X 3 = 15
3.Sum every second of the remaining numbers. 0+0+1+0+0+7=8
4.Add the result to the already calculated sum. 15+8=23
5.The totalsum is subtracted from the nearest ten, in this case 30. Checksum is 30-23=7 and Ean-13:

7 3 0 0 0 1 1 0 0 0 0 1  7

If anyone have a suggestion on how to accomplish this in code (preferably vb.net), it would be great.

Thanks for your help!