CODEWITHSUNDEEP
c#.netregex
UVerma
UVerma

Reputation: 1

Regex validation for email with specific condition

Currently I am using below code to validate email

public static bool IsValidEmail(string email)
        {
            var r = new Regex(@"^([0-9a-zA-Z]([-\.\'\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$");
            return !string.IsNullOrEmpty(email) && r.IsMatch(email);
        }

Now want to validate this "[email protected]" email as valid email id. what change needs to be done in regex?

Upvotes: 0

Views: 2676

Answers (1)

Leonardo de Oliveira
Leonardo de Oliveira

Reputation: 71

Using this Regex is not the best way to validate an Email.

But, correcting your Regex to the pattern you asked, it would be like this:

var r = new Regex(@"^([0-9a-zA-Z]([-\.\'\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z\.])+[.a-zA-Z]{2,9})$");

Still insisting on the regex, you can find a more complete pattern in: https://www.ex-parrot.com/pdw/Mail-RFC822-Address.html

I encourage you to use Microsoft documentation for email address as suggested by @Jeremy Lakeman -> https://learn.microsoft.com/en-us/dotnet/api/system.net.mail.mailaddress.trycreate?view=net-5.0

Upvotes: 3

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