Reading the selected value from asp:RadioButtonList using jQuery

Question

I've got code similar to the following...

<p><label>Do you have buffet facilities?</label>
  <asp:RadioButtonList ID="blnBuffetMealFacilities:chk" runat="server">
    <asp:ListItem Text="Yes" Value="1"></asp:ListItem>
    <asp:ListItem Text="No" Value="0"></asp:ListItem>
  </asp:RadioButtonList></p>
<div id="HasBuffet">
  <p><label>What is the capacity for the buffet?</label>
  <asp:RadioButtonList ID="radBuffetCapacity" runat="server">
    <asp:ListItem Text="Suitable for upto 30 guests" value="0 to 30"></asp:ListItem>
    <asp:ListItem Text="Suitable for upto 50 guests" value="30 to 50"></asp:ListItem>
    <asp:ListItem Text="Suitable for upto 75 guests" value="50 to 75"></asp:ListItem>
    <asp:ListItem Text="Suitable for upto 100 guests" value="75 to 100"></asp:ListItem>
    <asp:ListItem Text="Suitable for upto 150 guests" value="100 to 150"></asp:ListItem>
    <asp:ListItem Text="Suitable for upto 250 guests" value="150 to 250"></asp:ListItem>
    <asp:ListItem Text="Suitable for upto 400 guests" value="250 to 400"></asp:ListItem>
  </asp:RadioButtonList></p>
</div>

I want to capture an event when the radio list blBuffetMealFacilities:chk changes client side and perform a slide down function on the HasBuffet div from jQuery. What's the best way to create this, bearing in mind there are several similar sections on the page, where I want questions to be revealed depending on a yes no answer in a radio list.

Answer 1

this:

$('#rblDiv input').click(function(){
    alert($('#rblDiv input').index(this));
});

will get you the index of the radio button that was clicked (i think, untested) (note you've had to wrap your RBL in #rblDiv

you could then use that to display the corresponding div like this:

$('.divCollection div:eq(' + $('#rblDiv input').index(this) +')').show();

Is that what you meant?

Edit: Another approach would be to give the rbl a class name, then go:

$('.rblClass').val();

Answer 2

I don't test this example, but my problem is not the same what you show in this tutorial. I have a radiobuttonlist in a repeater control. So how I use your example because the ID will change. I write it in usercontrol so it automatic add prefix to the id of the control. Some one can show me the solution please! Thank you anyway!

Answer 3

Hi nguyen hiep - following is the code we eventually created. A breif explanation first. We used a "q_" for the div name wrapped around the radio button question list. Then we had "s_" for any sections. The following code loops through the questions to find the checked value, and then performs a slide action on the relevant section.

var shows_6 = function() {
  var selected = $("#q_7 input:radio:checked").val();
  if (selected == 'Groom') {
    $("#s_6").slideDown();
  } else {
    $("#s_6").slideUp();
  }
};
$('#q_7 input').ready(shows_6);
var shows_7 = function() {
  var selected = $("#q_7 input:radio:checked").val();
  if (selected == 'Bride') {
    $("#s_7").slideDown();
  } else {
    $("#s_7").slideUp();
  }
};
$('#q_7 input').ready(shows_7);
$(document).ready(function() {
  $('#q_7 input:radio').click(shows_6);
  $('#q_7 input:radio').click(shows_7);
});

<div id="q_7" class='question '><label>Who are you?</label> 
  <p>
    <label for="ctl00_ctl00_ContentMainPane_Body_ctl00_ctl00_chk_0">Bride</label>
    <input id="ctl00_ctl00_ContentMainPane_Body_ctl00_ctl00_chk_0" type="radio" name="ctl00$ctl00$ContentMainPane$Body$ctl00$ctl00$chk" value="Bride" />
  </p> 
  <p>
    <label for="ctl00_ctl00_ContentMainPane_Body_ctl00_ctl00_chk_1">Groom</label>
    <input id="ctl00_ctl00_ContentMainPane_Body_ctl00_ctl00_chk_1" type="radio" name="ctl00$ctl00$ContentMainPane$Body$ctl00$ctl00$chk" value="Groom" />
  </p> 

</div>

The following allows us to make the question mandatory...

<script type="text/javascript"> 
var mandatory_q_7 = function() {
  var selected = $("#q_7 input:radio:checked").val();
  if (selected != '') {
    $("#q_7").removeClass('error');
  }
};
$(document).ready(function() {
    $('#q_7 input:radio').click(function(){mandatory_q_7();});
});
</script>

Here's an example of the actual show / hide layer

<div class="section" id="s_6"> 
    <h2>Attire</h2> 
    ...
</div>

Answer 4

Thank you digiguru very much! I still don't have time to test it right now, but I will post the result as soon as posible. I had write something base on your tutorial like that to make it clearly. Hope this helpful for someone

Hey

You choose Groom

ah

You choose Bride

Answer 5

I founded a simple solution:

var Ocasiao = ""; $('#ctl00_rdlOcasioesMarcas input').each(function() { if (this.checked) { Ocasiao = this.value } });

Answer 6

this is Awesome....very very nice code and its working for me...thankyou so much......

Answer 7

The simple way to retrieve checked value of RadioButtonList1 is:

$('#RadioButtonList1 input:checked').val()

Answer 8

Andrew Bullock solution works just fine, I just wanted to show you mine and add a warning.

//Works great

$('#<%= radBuffetCapacity.ClientID %> input').click(function (e) {
   var val = $('#<%= radBuffetCapacity.ClientID %>').find('input:checked').val();
   //Do whatever
});

//Warning - works in firefox but not IE8 .. used this for some time before a noticing that it didnt work in IE8... used to everything working in all browsers with jQuery when working in one.

$('#<%= radBuffetCapacity.ClientID %>').change(function (e) {
   var val = $('#<%= radBuffetCapacity.ClientID %>').find('input:checked').val();
   //Do whatever
});