MVC3 regular expression for email

Question

I am using the follwoing regular expression for email validation

@"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$"

Bit it accepts []name@gmail.com[][] as a valid email.whats the pattern i should use? Is it possible to check that at client side?

[I Knew How To Validate An Email Address Until I Read The RFC](http://haacked.com/archive/2007/08/21/i-knew-how-to-validate-an-email-address-until-i.aspx) — Habib, Jan 24 '13 at 09:26
Did you try to search a little on the subject before posting your question? — Yannick Blondeau, Jan 24 '13 at 09:27
Dear @YannickBlondeau I tried a lot but when i entered before or later valid email address it accepts as a valid email — Amol, Jan 24 '13 at 09:30
possible duplicate of [Email Validation - Regular Expression](http://stackoverflow.com/questions/1903356/email-validation-regular-expression) — Anirudha, Jan 24 '13 at 09:32
@Amol, I meant searching on StackOverflow to see if your question has already been answered... — Yannick Blondeau, Jan 24 '13 at 09:50
@YannickBlondeau yes but none of regex solve my problem i want this problem solve at client side to avoid user headac that after submit he knows that entered email address is wrong — Amol, Jan 24 '13 at 09:56
possible duplicate of [Using a regular expression to validate an email address](http://stackoverflow.com/questions/201323/using-a-regular-expression-to-validate-an-email-address) — Lie Ryan, Jan 25 '13 at 09:23

score 2 · Accepted Answer · edited May 23 '17 at 12:21

2

If you want to validate an Email Address Regex is not the right choice.

Use MailAddress as recommended by SLaks

try 
{
   address = new MailAddress(address).Address;
   //address is valid here
} 
catch(FormatException) 
{
   //address is invalid
}

But if you are addicted to regex..just do this

.*@.*

edited May 23 '17 at 12:21

Community

answered Jan 24 '13 at 09:30

Anirudha

Hello, is it possible to check at client side? – Amol Jan 24 '13 at 09:38
1

@Amol not possible since there are many corner cases where the regex would fail..you can try `.*@.*` at client side and then check it through `MailAddress` at server side.. – Anirudha Jan 24 '13 at 09:41

1 Answers1