Email validation expression

Question

After writing this, also while entering email it is showing an error message and it is working fine. I don't know whats going on. Any one please explain once. Thanks in advance

<asp:RequiredFieldValidator ID="Txt5" runat="server" ControlToValidate="TextBox5" ValidationGroup="abc" ErrorMessage="*"></asp:RequiredFieldValidator>
        <asp:RegularExpressionValidator ID="Txt05" runat="server" ControlToValidate = "TextBox5" Display ="Dynamic" ValidationExpression="^\w+([-+.']\w+)*@domain.com$" ErrorMessage="Please enter valid email address.."></asp:RegularExpressionValidator>

Try change regex http://stackoverflow.com/questions/16167983/best-regular-expression-for-email-validation-in-c-sharp — zchpit, Apr 02 '14 at 09:26
if your ValidationExpression is correct than try to put ValidationGroup="abc" property to RegularExpressionValidator . — Hardik Vinzava, Apr 02 '14 at 09:35

Christos · Accepted Answer · 2015-03-03T22:00:23.407

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Please use this one as your regular expression:

ValidationExpression="[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@
(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?"

For further clarification, on how this works, please look here.

As it is now, your regular expression matces only email addresses with domain equal to domain and .com extension. Certainly, that's a problem, since xzxzx@yahoo.gr is a valid email address and your reg exp will not evaluate it as a valid one. (xzxzx would be some name)

edited Mar 03 '15 at 22:00

answered Apr 02 '14 at 09:32

Christos

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@chrish549 you welcome ! Test it and let me know, if you experience any issues. – Christos Apr 02 '14 at 09:39

score 0 · Answer 2 · edited May 23 '17 at 11:48

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According to your expression, it expects @domain.com at the end of each email address.. Hence, 'something@domain.com' would not show any error message.. Try the expression as mentioned in the post Using a regular expression to validate an email address

edited May 23 '17 at 11:48

Community

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answered Apr 02 '14 at 09:38

Mrudang Vora

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Email validation expression

2 Answers2