CODEWITHSUNDEEP
c#asp.netregex
user3270152
user3270152

Reputation: 75

Regular Expression Not working in C# Code

I'm using this regular expression

^(?=.{0,150}$)\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*

for validating Email Addresses. when I Enter this Email Address : konstinkö[email protected] . It is working using Regular expression validator(it is showing InValidEmail Address), but when validating in C# code it is not working(taking it as validEmail Address) 

return System.Text.RegularExpressions.Regex.IsMatch(
    strEmailAddress,
    @"^(?=.{0,150}$)\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*",
    System.Text.RegularExpressions.RegexOptions.IgnoreCase
);

Upvotes: 0

Views: 1608

Answers (4)

Reubene
Reubene

Reputation: 146

If I understand your problem you want the address: konstinkö[email protected] to fail validation because it contains Unicode characters. Your regex uses the \w character class which by default matches any word characters, this includes any Unicode characters defined as letters.

You can force \w to be just [a-zA-Z_0-9] by specifying RegexOptions.ECMAScript you code becomes:

return System.Text.RegularExpressions.Regex.IsMatch(
    strEmailAddress,
    @"^(?=.{0,150}$)\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*",
    System.Text.RegularExpressions.RegexOptions.IgnoreCase | System.Text.RegularExpressions.RegexOptions.RegexOptions.ECMAScript
);

Alternatively you could replace the \w with [a-zA-Z_0-9] which would have the same effect.

Upvotes: 1

Eliran Pe'er
Eliran Pe'er

Reputation: 2639

I think a better solution would be using the System.Net.Mail.MailAddress class to validate the email address.

Try using the following code: 

try {
    MailAddress addr = new System.Net.Mail.MailAddress(email);
    return true;
}
catch {
    return false;
}

UPDATE Regex solution:

bool d = Regex.IsMatch("konstinkö[email protected]", @"^([\p{L}\.\-\d]+)@([\p{L}\-\.\d]+)((\.(\p{L}){2,63})+)$", RegexOptions.IgnoreCase);

Works for me.

Upvotes: 0

ste
ste

Reputation: 31

Try to use this one:

Regex.IsMatch(strEmailAddress, @"^[\\p{L}0-9!#$%&'*+\/=?^_`{|}~-]+(?:\.[\\p{L}0-9!#$%&'*+\/=?^_`{|}~-]+)*@(?:[\\p{L}0-9](?:[\\p{L}0-9-]*[\\p{L}0-9])?\.)+[\\p{L}0-9](?:[\\p{L}0-9-]*[\\p{L}0-9])?$", RegexOptions.IgnoreCase);

it will admit non ASCII character

Upvotes: 0

SMI
SMI

Reputation: 311

End you Regex with $ as an example see this. http://www.dotnetperls.com/regex-match

Upvotes: 0

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