How do you validate phone number in asp.net?

Question

I need to validate phone number that allows numeric and symbols + - () how can i do so in asp.net?

<asp:TextBox ID="TxtNo" runat="server"></asp:TextBox>
    <asp:RegularExpressionValidator ID="RegularExpressionValidator2" runat="server" ErrorMessage="Enter valid Phone number" ControlToValidate="TxtNo" ></asp:RegularExpressionValidator>

Do you mean US phone numbers only? In my opinion use an input mask to force data entry in a specific manner rather than trying to figure out what the user entered. — Candide, Sep 03 '13 at 06:45

score 2 · Answer 1 · answered Sep 03 '13 at 06:34

2

you need to add

<asp:RegularExpressionValidator ID="RegularExpressionValidator2" runat="server" ErrorMessage="Enter valid Phone number" ControlToValidate="TxtNo" ValidationExpression="^[01]?[- .]?(\([2-9]\d{2}\)|[2-9]\d{2})[- .]?\d{3}[- .]?\d{4}$" ></asp:RegularExpressionValidator>

with the expression that should specify the format that needs to be validated. You can choose one from here and specify it in the validation expression above

answered Sep 03 '13 at 06:34

Ehsan

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Yes correct. I know that have to use validation expression. if i use ValidationExpression="^($|\d| |-|$)*$" than it validates for numeric and symbols like - ( ) but not for + symbol. – user2240189 Sep 03 '13 at 06:47
you can add the + at the start as an optional input – Ehsan Sep 03 '13 at 06:59
something like [01+]? – Ehsan Sep 03 '13 at 07:03

score 1 · Answer 2 · answered Sep 03 '13 at 07:12

ValidationExpression= "^([0-9\(\)\/\+ \-]*)$"

<asp:TextBox ID="TxtNo" runat="server"></asp:TextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator2" 
runat="server" ErrorMessage="Enter valid Phone number" 
ControlToValidate="TxtNo" 
ValidationExpression= "^([0-9\(\)\/\+ \-]*)$"></asp:RegularExpressionValidator>

score 1 · Answer 3 · answered Sep 03 '13 at 07:16

1

Try this validation expression

^([\(]{1}[0-9]{3}[\)]{1}[\.| |\-]{0,1}|^[0-9]{3}[\.|\-| ]?)?[0-9]{3}(\.|\-| )?[0-9]{4}$

answered Sep 03 '13 at 07:16

Arun Bertil

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How do you validate phone number in asp.net?

3 Answers3

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