How to Validation phone number and -

Question

For the validation for the phone number and included -

@\"^\\+(?:[0-9] ?){6,14}[0-9]$\"

I have to validate phone number with -

example 333-333-3333 (

Answer 1

well it depends on how strict you want to be it doesn't seem like this regex is especially strict. this regex says:

1. start at beginning of line
2. match one + (or maybe 1 or 0) which seems ambiguous (but may not be depending on implementation) because the capture parentheses:() breaks up the relationship of the \+ and the ?
3. possibly misplaced :
4. match any digit 0-9 1 or 0 times 6-14 times
5. then one digit 0-9
6. then end of line.

also you note that any backslash will have to be doubled... @"\\b" for a word boundary. you may want to try something like...

@"\\b[\\d]{3}\\-[\\d]{3}\\-[\\d]{4}\\b"
would I think match your example, but it wouldn't match
(555) 555 - 5555 or
555.555.5555 or
+44 1865  55555