How do I generate random bank account number on C#

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I want to generate bank account number, the number must start with 32 like for example 32098723, 32162545, 32752934 etc.. and it has to be of be 8 digits. Can anyone help me please and thank you.

What I have tried:

public long GetNewAccountNumber(long accountNumber)
{
Random random = new Random();
long newAccountNumber = random.Next(32000000, 33000000);

return newAccountNumber;

}

Posted 21-Aug-18 13:41pm

Ron23111

Updated 22-Aug-18 2:21am

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Patrice T 21-Aug-18 19:58pm

Do you have a question or a problem ?

Ron23111 21-Aug-18 20:13pm

this is my question that did I do it right or not

Patrice T 21-Aug-18 20:44pm

Depend.
What is the difference between a 8 digit random number and a bank account ?

George Swan 22-Aug-18 1:29am

Bank account numbers are not random. Some sort of modulus arithmetic is applied to them. See this https://www.vocalink.com/media/1733/vocalink-validating-account-numbers-v350.pdf

Patrice T 22-Aug-18 2:09am

I know it, but does the OP ? :)

2 solutions

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Er. Puneet Goel · Accepted Answer · 2018-08-21T18:34:00

Solution 1

Here it is:

String startWith = "32";
Random generator = new Random();
String r = generator.Next(0, 999999).ToString("D6");
String aAccounNumber = startWith + r;

Posted 21-Aug-18 18:34pm

Er. Puneet Goel

Updated 21-Aug-18 18:35pm

v2

CHill60 · Accepted Answer · 2018-08-22T02:22:00

Solution 1 is providing you with pseudo-random numbers and should really have warned you about the implications of that (e.g. you could end up with duplicates). See the documentation for further information Random Class (System) | Microsoft Docs[^]

You would probably be better off using the RNGCryptoServiceProvider Class[^]. There are examples of how to do that on that link.

Once you have your random number r you can generate your bank account number with

C#

string accNumber = String.Format("32{0}", r.ToString("D6"));

Now note the comments from @ppolymorphe and @George-Swan - Bank Accounts are not just random numbers, they follow very specific rules. Once you have generated your number you should check that it is valid.

Here is a clickable version of George's link https://www.vocalink.com/media/1733/vocalink-validating-account-numbers-v350.pdf[^]

Here is another example of a validation tool Sortcode and Bank Account Validation - C# Developers Guide[^]

And here is a Codeproject article on the subject IBAN Validator[^]

There are many commerical products and APIs available to do the validation.