Can we add a string variable to have an increment using x++?

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Posted on by Ken Manhattan

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Hello guys,

Need help on some logic, for example when I have a variable like /TEST-0001/, can we make a code to have it increase ?

So the end result, I will have an increase variable like /TEST-0002, TEST-0003, TEST-0004, and so on/. For how many increment, I add an input for user to specify how many they need.

FYI, for an odd reason, I can't use number sequence for this activity.

Thanks.

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André Arnaud de Cal... 300,911 Super User 2025 Season 2 on at

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Hi Ken,

Yes this is possible. I'm not able to directly paste an example, but you can find one yourself in the application. When creating sub-projects, a string gets incremented. You can do some reverse engineering to find out this is done in the standard.

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Martin Dráb 237,795 Most Valuable Professional on at

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I would parse the string to the number and the prefix, increased the number (++ operator) and composed the string again.

Increasing a character code is technically possible, but it's not what you want. For example, in ASCII, the next character after '9' is ':'. It can't be '10', because that's a string consisting of two characters, not a character, therefore it's a completely different thing.

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Ken Manhattan 552 on at

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Hi Andre,

I'm sorry, but what "subproject" you meaning ? And this is not handled by number sequence ? cause what I look is not the one using number sequence setup.

Thanks

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Bharani Preetham Pe... 3,634 Moderator on at

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Yeah you can just increment the digit value and again concat it to the string. This doesn't require number sequence. But based on your requirement we can suggest how to increment.

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Ken Manhattan 552 on at

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Hi Bharani,

and your suggestion is ?

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André Arnaud de Cal... 300,911 Super User 2025 Season 2 on at

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Hi Ken,

When you have a main project, you can specify a format that will be added to the main project when creating sub projects.

Assume you have project 1001 and a format set as -###. When creating subprojects for this project, it will create them while replacing the hash symbols with numeric values. E.g.

1001-001

1001-002

1001-003

etc.

A sub for another project will start at 1 again. It does not require setting up a number sequence.

You can find the logic in the method generateNextSubProjectId on the table ProjTable.

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Arunraj Rajasekar 1,743 on at

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Hi,

I have explained the logic in four steps below. You can simplify and improve it as per your business requirement. Validate before saving the result to table to avoid duplicate records.

Read the string value in a buffer, something like this
str testStr = TEST-0002;

Use substring to get the number and convert it to number
int incNum = str2int(subStr(testStr,5,99);

Then increment the number
incNum = incNum +1;

convert the number again to string, concatenate it back and save it.

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