CODEWITHSUNDEEP
c#regex
cepbuch
cepbuch

Reputation: 516

Combining regular expressions c#

I'm trying to make simple email validation by myself. And I need to combine two patterns:

1) @"^[A-Za-z0-9][A-Za-z0-9._-]+[A-Za-z0-9]@[A-Za-z0-9][A-Za-z0-9.-]+\.[A-Za-z0-9.-]+[A-Za-z0-9]$" // allows only [email protected] and dot is not the first or last charachter of local and domain part

2) @"^([^\.]|([^\.])\.[^\.])*$" // there must not be two or more dots in a row.

In other words, I want to add to the first regex a condition that [email protected] is true, but [email protected] is false.

Upvotes: 2

Views: 507

Answers (1)

vks
vks

Reputation: 67968

^(?!.*[.][.])[A-Za-z0-9][A-Za-z0-9._-]+[A-Za-z0-9]@[A-Za-z0-9][A-Za-z0-9.-]+.[A-Za-z0-9.-]+[A-Za-z0-9]$

Just add a lookahead for the same.

See demo.

https://regex101.com/r/dR4pQ2/1

Upvotes: 1

Related Questions