When I Enter A Charchter Instead Of Number I Need To Display Message Please " Enter Number" Using Javascript

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HI ,
i want to validate in my application tht it shd display message enter number if i enter a character instead of number ....

Posted 20-May-15 22:19pm

Member 11704156

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3 solutions

Solution 2

http://www.aspsnippets.com/Red/Articles/Numeric-Validation-Accept-only-numeric-values-numbers-in-TextBox-using-JavaScript.aspx[^]

Posted 21-May-15 2:45am

bhavin tanna

Solution 3

If you're using ASP.NET 4.0 or later, you just need to add type="number" to your TextBox:

aspx

<asp:TextBox runat="server" type="number" />

This will render a numeric input type:
http://www.html5tutorial.info/html5-number.php[^]

It's supported in all modern browsers:
http://caniuse.com/#feat=input-number[^]

If you need to support older browsers, there is a polyfill available:
https://github.com/jonstipe/number-polyfill[^]

This has the added benefit that, on mobile devices, the user will see the numeric keyboard by default when they tap on the input.

Posted 21-May-15 5:09am

Richard Deeming

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Member 11704156 22-May-15 1:30am

still i am not getting the alert message like please enter number if i giv alphabet ..whats the solution .. wt to code using javascript

Richard Deeming 22-May-15 8:18am

Displaying an alert message every time the user presses a key you don't like is a very bad idea. It's just going to annoy the users.

Using a numeric input, the user either won't be able to enter non-numeric characters, or will get a validation warning if they do:
Example[^]

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vivekkamate · Accepted Answer · 2015-05-20T23:31:00

XML

<!DOCTYPE html>
<html>
<head>
<script>
    function changeFunction() {
        var reg = /[1-9]/g
        input_val = document.getElementById("input_box_id").value
        if(!reg.test(input_val) ){ //true if non numeric value
            alert("Please enter valid number");
        }
    }
</script>
</head>
<body>

Number : <input type="text" id="input_box_id" onchange="changeFunction()">

</body>
</html>