Check whether this works or not. I assume that you are using Extended Regular Expression (REG_EXTENDED
flag):
"^(?\\([0-9]{3}\\))?[-. ]?\\([0-9]{3}\\)[-. ]?\\([0-9]{4}\\)$"
ERE is a bit different in the fact that it treats (
, )
as literal (
, )
and \(
, \)
as grouping.
References:
2
solved Regular expression for phone numbers in c