how can i do data type check validation using jquery ?

Question

3.00/5 (2 votes)

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Hii,
I want to do data type check .. value entered in text box must be in double format. I can use it compare validator for that . but i want to do it using jquery .

Posted 19-Aug-13 20:39pm

Torakami

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2 solutions

Solution 2

Hi,

You can use Javascript's parsefloat() function to validate the textbox.

http://www.w3schools.com/jsref/jsref_parseFloat.asp[^]

You can try something like this...
Please don't copy and paste, I'm giving you the hint...

JavaScript

$('#txtdouble').blur( function(){
var str= parsefloat($('#txtdouble').val());
if(str==NaN)
{
//do something
}
else
{
//do something
}

});

Posted 19-Aug-13 20:52pm

Rockstar_

Comments

Thomas Daniels 20-Aug-13 3:57am

Hi,
You posted a link to W3Schools. In my opinion, that's not a good idea. If you want to know why, have a look here: http://www.w3fools.com/[^]

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Sampath Lokuge · Accepted Answer · 2013-08-19T20:48:00

For that you can use jQuery Validation Plugin

Documentation :http://jqueryvalidation.org/documentation[^]

number method

http://jqueryvalidation.org/number-method[^]

Sample

XML

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Makes "field" required and a decimal number only.</title>
<link rel="stylesheet" href="http://jquery.bassistance.de/validate/demo/site-demos.css">

</head>
<body>
<form id="myform">
<label for="field">Required, decimal number: </label>
<input class="left" id="field" name="field">
<br/>
<input type="submit" value="Validate!">
</form>
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="http://jquery.bassistance.de/validate/jquery.validate.js"></script>
<script src="http://jquery.bassistance.de/validate/additional-methods.js"></script>
<script>
// just for the demos, avoids form submit
jQuery.validator.setDefaults({
  debug: true,
  success: "valid"
});
$( "#myform" ).validate({
  rules: {
    field: {
      required: true,
      number: true
    }
  }
});
</script>
</body>
</html>

I hope this will help to you.