How can I know which radio button is selected via

Question

I have two radio buttons and want to post the value of the selected one. How can I get the value with jQuery?

I can get all of them like this:

$("form :radio")

How do I know which one is selected?

Answer 1

If you only have 1 set of radio buttons on 1 form, the jQuery code is as simple as this:

$( "input:checked" ).val()

Answer 2

What I needed to do was simplify C# code, that is do as much as possible in the front end JavaScript. I'm using a fieldset container because I'm working in DNN and it has its own form. So I can't add a form.

I need to test which text box out of 3 is being used and if it is, what's the type of search? Starts with the value, Contains the value, Exact Match of the value.

HTML:

<fieldset id="fsPartNum" class="form-inline">
<div class="form-group">
    <label for="txtPartNumber">Part Number:</label>
    <input type="text" id="txtPartNumber" class="input-margin-pn" />
</div>
<div class="form-group">
    <label for="radPNStartsWith">Starts With: </label>
    <input type="radio" id="radPNStartsWith" name="partNumber" checked  value="StartsWith"/>
</div>
<div class="form-group">
    <label for="radPNContains">Contains: </label>
    <input type="radio" id="radPNContains" name="partNumber" value="Contains" />
</div>
<div class="form-group">
    <label for="radPNExactMatch">Exact Match: </label>
    <input type="radio" id="radPNExactMatch" name="partNumber" value="ExactMatch" />
</div>

And my JavaScript is:

        alert($('input[name=partNumber]:checked', '#fsPartNum').val()); 
    if(txtPartNumber.val() !== ''){
        message = 'Customer Part Number';
    }
    else if(txtCommercialPartNumber.val() !== ''){

    }
    else if(txtDescription.val() !== ''){

    }

Just saying any containing tag with an ID can be used. For DNNers, this is good to know. The end goal here is pass to the mid-level code what is needed to start a parts search in SQL Server.

This way I don't have to copy the much more complicated previous C# code also. The heavy lifting is being done right here.

I had to look a bit for this and then tinker with it to get it to work. So for other DNNers, hopefully this is easy to find.

Answer 3

try it-

var radioVal = $("#myform").find("input[type='radio']:checked").val();

console.log(radioVal);

Answer 4

To get the value of the selected radioName item of a form with id myForm:

$('input[name=radioName]:checked', '#myForm').val()

Here's an example:

$('#myForm input').on('change', function() {
   alert($('input[name=radioName]:checked', '#myForm').val()); 
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="myForm">
  <input type="radio" name="radioName" value="1" /> 1 <br />
  <input type="radio" name="radioName" value="2" /> 2 <br />
  <input type="radio" name="radioName" value="3" /> 3 <br />
</form>

Answer 5

Another way to get it:

 $("#myForm input[type=radio]").on("change",function(){
   if(this.checked) {
    alert(this.value);
    }
  });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="myForm">
   <span><input type="radio" name="q12_3" value="1">1</span><br>
   <span><input type="radio" name="q12_3" value="2">2</span>
</form>

Answer 6

I use this simple script

$('input[name="myRadio"]').on('change', function() {
  var radioValue = $('input[name="myRadio"]:checked').val();        
  alert(radioValue); 
});