Question

I have two regular expressions that validate the values entered.

One that allows any length of Alpha-Numeric value:

@'^\s*(?<ALPHA>[A-Z0-9]+)\s*' 

And the other only allows numerical values:

@'^\s*(?<NUM>[0-9]{10})' 

How can I get a numerical string of the length of 11 not to be catched by the NUM regex.

Answer 1

I think what you’re trying to say is that you don’t want to allow any more than 10 digits. So, just add a $ at the end to specify the end of the regex.

Example: @'^\s*(?[0-9]{10})$'

---

Here’s my original answer, but I think I read you too exact.

string myRegexString = `@'(?!(^\d{11}$)` ... your regex here ... )'; 

That reads ‘while ahead is not, start, 11 digits, end’