Does anyone know where there is c# code or a dll which can generate sample credit card numbers

Question

For an application we are working on I need to generate sample credit card numbers which pass the Luhn algorithm but which are also unique, so we cannot use the sample credit card numbers.

We need to be able to generate around 300 card numbers at a time, and ideally i would be able to do this when generating my input data.

Many Thanks

score 9 · Accepted Answer · answered Jun 08 '09 at 14:18

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Create random numbers, then calculate the checksum number.

You can find more information at Wikipedia - Luhn, both details about the algorithm and links to different implementations.

answered Jun 08 '09 at 14:18

sisve

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There is actually an algorithm on the wikipedia page to generate the numbers as well. – PeteT Jun 08 '09 at 14:35

score 3 · Answer 2 · answered Jun 08 '09 at 14:21

From what I see you just need to ensure that when running through the algorithm you get a result of 0 (mod 10). So you can pick any number of random digits (or sequential if you like) and just add one last digit which will ensure that the number is valid.

score 2 · Answer 3 · answered Aug 20 '09 at 20:33

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I took the code from Graham Kings site and ported it to c#, also emailing Graham a copy, you can find it here link text

answered Aug 20 '09 at 20:33

Kev Hunter

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The latest version of c# port can be found on [GitHub](https://github.com/grahamking/darkcoding-credit-card/blob/master/CreditCardNumberGenerator.cs) – Michael Freidgeim Jun 01 '16 at 21:24

score 2 · Answer 4 · edited Jun 01 '16 at 21:28

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Do you need the credit card #'s to pass any other tests? i.e. should they look like valid VISA, MasterCard, or AMEX, etc.

If so, you may want a resource like Graham King's otherwise some of the other suggestions here are good.

The latest version of Graham King's generator (including c# code) can be found on GitHub.

edited Jun 01 '16 at 21:28

Michael Freidgeim

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answered Jun 08 '09 at 14:26

John Weldon

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That site's commentary is hilarious, btw. +1 – GWLlosa Jun 08 '09 at 15:08

score 1 · Answer 5 · edited May 23 '17 at 12:08

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If you need a list to test each card, you'll find one here. How to test credit card interactions?

edited May 23 '17 at 12:08

Community

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answered Jun 08 '09 at 14:25

Mike

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Does anyone know where there is c# code or a dll which can generate sample credit card numbers

5 Answers5