String.Format() split integer value

Question

I'm wondering if it's possible for .Net's String.Format() to split an integer apart into two sub strings. For example I have a number 3234 and I want to format it as 32X34. My integer will always have 4 or 6 digits. Is this possible using String.Format()? If so what format string would work?

P.S. I know there is other ways to do this, but i'm specifically interested to know if String.Format() can handle this.

Answer 1

No, it can't.

In fact, it seems that your integers aren't integers. Perhaps they should be stored in a class, with its own ToString() method that will format them this way.

Answer 2

You can specify your own format when calling String.Format

String.Format("{0:00x00}", 2398) // = "23x93"

Answer 3

James, I'm not sure you've completely specified the problem.

If your goal is to put the 'x' in the center of the string, Samuel's answer won't work for 6 digit numbers. String.Format("{0:00x00}", 239851) returns "2398x51" instead of "239x851"

Instead, try:

String.Format(val<10000 ? "{0:00x00}" : "{0:000x000}", val)

In either case, the method is called Composite Formatting.

(I'm assuming the numbers will be between 1000 and 999999 inclusive. Even then, numbers between 1000 and 1009 inclusive will report the number after the 'x' with an unnecessary leading '0'. So maybe this approach is valid for values between 1010 and 999999 inclusive.)