Forcing the user to type just Numbers

Question

I have a TextBox and I want that the user type just numbers, not other format.

How can I do that ?

If you have access to his keyboard remove the alphabetic keys. Not every solution needs to be software. — John K, Jun 15 '10 at 18:07

score 5 · Accepted Answer · answered Jun 15 '10 at 18:06

Use a regular expression validator:

<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="TextBox1"
ErrorMessage="Please Enter Only Numbers" Style="z-index: 101; left: 424px; position: absolute;
top: 285px" ValidationExpression="^\d+$" ValidationGroup="check"></asp:RegularExpressionValidator>

score 2 · Answer 2 · edited May 23 '17 at 12:19

2

see this thread for a jquery solution How to allow only numeric (0-9) in HTML inputbox using jQuery?

edited May 23 '17 at 12:19

Community

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answered Jun 15 '10 at 18:06

Donn Felker

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score 1 · Answer 3 · answered Jun 15 '10 at 18:06

1

<asp:TexBox runat="server" ID="TexBox1" />
<asp:RegularExpressionValidator runat="server" ValidationExpression="\d+" ControlToValidate="TexBox1" ErrorMessage="Error!" />

answered Jun 15 '10 at 18:06

abatishchev

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score 1 · Answer 4 · answered Jul 24 '11 at 07:38

1

<input name="number" onkeyup="this.value=this.value.replace(/\D/g,'')">

answered Jul 24 '11 at 07:38

Patrick Fisher

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score 0 · Answer 5 · answered Jun 15 '10 at 18:06

One way to do is by using the FilteredTextBox:

ilteredTextBox is an extender which prevents a user from entering invalid characters into a text box. Note that since this effect can be avoided by deactivating JavaScript, you should use this extender as a convenience for your users, but you must never expect that the data being sent to the server consists of "valid" chars only.

http://www.asp.net/ajax/ajaxcontroltoolkit/Samples/FilteredTextBox/FilteredTextBox.aspx

Forcing the user to type just Numbers

5 Answers5