Regex for decimal values in Javascript (c#)

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Hey everyone,

Below is the regular expression I used in Javascript for decimal numbers (Ex: 10.01, 121.122,..). But it allows string like "a" , "b" etc. If I give "aa" then the regulare expression works as expected

var regex=new RegExp("^[+-]?[0-9]*\.?[0-9]*$");

Any Idea where I made a mistake.

Thanks for helping me to sort this issue.

Regards,
Rajara.

Posted 8-May-14 0:41am

Member 10768757

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2 solutions

Solution 1

C#

$('#YourField').change(function () {
        var v = parseFloat(this.value);
        if (isNaN(v)) {
            this.value = '';            
        } else {
            this.value = v.toFixed(2);           
        }
    });

Posted 8-May-14 0:48am

Vi(ky

Comments

Member 10768757 8-May-14 6:56am

Hi,

Thanks for your time. But if I enter "1asd" it gives 1 and eliminated the remaining.
In mycase it should throw error.

Vi(ky 8-May-14 7:05am

before using parseFloat, you can use the below pattern to ensure the input contains only numbers if not then throw error<br>
var pattern = /^[0-9-+]+$/; <br>
if (pattern.test(textfield)) == false){<br>
//do whatever you want<br>
}

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Sanket Saxena · Accepted Answer · 2014-05-08T00:55:00

Solution 2

try Regex:

JavaScript

var intRegex = /^(?:[1-9]\d*(?:\.\d\d?)?|0\.[1-9]\d?|0\.0[1-9])$/;

Posted 8-May-14 0:55am

Sanket Saxena

Updated 8-May-14 1:04am

v2

Comments

Member 10768757 8-May-14 7:00am

Sorry mate, it doesnt work.

Sanket Saxena 8-May-14 7:04am

check updated solution dear

Member 10768757 8-May-14 7:39am

Thank you !! It worked ..

Sanket Saxena 8-May-14 7:41am

Great...Welcome...hey its downvoted strange might some novice did. :)