This question already has answers here:
Getting ID from asp.net runat server in jQuery
(8 answers)
Closed 7 years ago.
I have an ASP.NET Forms page and there is a fieldset and inside this there are items that each have a radio button. Basically I want to determine if a certain item is checked. However, it appears that it's location could move and therefore the id could change if the database is updated. How can I determine if the item is checked using if the id attribute can change? I don't think the value would change, how can I determine if it is checked by using the value attribute?
I would like to add a class as suggested but I really only want to use javascript and not change any of the ASP.NET code in the .aspx file.
<fieldset style="padding-left: 5px;">
<input id="ctl00_ctl00_MainContent_ContentPlaceHolder_rblstRole_8" type="radio" name="ctl00$ctl00$MainContent$ContentPlaceHolder$rblstRole" value="36">
<label for="ctl00_ctl00_MainContent_ContentPlaceHolder_rblstRole_8">Agency VP</label>
<br>
<input id="ctl00_ctl00_MainContent_ContentPlaceHolder_rblstRole_9" type="radio" name="ctl00$ctl00$MainContent$ContentPlaceHolder$rblstRole" value="13">
<label for="ctl00_ctl00_MainContent_ContentPlaceHolder_rblstRole_9">Agent</label>
...
You can use attribute selector of jQuery:
$('input[value="36"]').is(':checked')
and you can see the working demo here: http://jsfiddle.net/5637csyz/
I have 3 radio buttons in my web page, like below:
<label for="theme-grey">
<input type="radio" id="theme-grey" name="theme" value="grey" />Grey</label>
<label for="theme-pink">
<input type="radio" id="theme-pink" name="theme" value="pink" />Pink</label>
<label for="theme-green">
<input type="radio" id="theme-green" name="theme" value="green" />Green</label>
In jQuery, I want to get the value of the selected radio button when any of these three are clicked. In jQuery we have id (#) and class (.) selectors, but what if I want to find a radio button by its name, as below?
$("<radiobutton name attribute>").click(function(){});
Please tell me how to solve this problem.
This should do it, all of this is in the documentation, which has a very similar example to this:
$("input[type='radio'][name='theme']").click(function() {
var value = $(this).val();
});
I should also note you have multiple identical IDs in that snippet. This is invalid HTML. Use classes to group set of elements, not IDs, as they should be unique.
To determine which radio button is checked, try this:
$('input:radio[name=theme]').click(function() {
var val = $('input:radio[name=theme]:checked').val();
});
The event will be caught for all of the radio buttons in the group and the value of the selected button will be placed in val.
Update: After posting I decided that Paolo's answer above is better, since it uses one less DOM traversal. I am letting this answer stand since it shows how to get the selected element in a way that is cross-browser compatible.
$('input:radio[name=theme]:checked').val();
another way
$('input:radio[name=theme]').filter(":checked").val()
This works great for me. For example you have two radio buttons with the same "name", and you just wanted to get the value of the checked one. You may try this one.
$valueOfTheCheckedRadio = $('[name=radioName]:checked').val();
The following code is used to get the selected radio button value by name
jQuery("input:radio[name=theme]:checked").val();
Thanks
Adnan
For anyone who doesn't want to include a library to do something really simple:
document.querySelector('[name="theme"]:checked').value;
jsfiddle
For a performance overview of the current answers check here
I found this question as I was researching an error after I upgraded from 1.7.2 of jQuery to 1.8.2. I'm adding my answer because there has been a change in jQuery 1.8 and higher that changes how this question is answered now.
With jQuery 1.8 they have deprecated the pseudo-selectors like :radio, :checkbox, :text.
To do the above now just replace the :radio with [type=radio].
So your answer now becomes for all versions of jQuery 1.8 and above:
$("input[type=radio][name=theme]").click(function() {
var value = $(this).val();
});
You can read about the change on the 1.8 readme and the ticket specific for this change as well as a understand why on the :radio selector page under the Additional Information section.
If you'd like to know the value of the default selected radio button before a click event, try this:
alert($("input:radio:checked").val());
You can use filter function if you have more than one radio group on the page, as below
$('input[type=radio]').change(function(){
var value = $(this).filter(':checked' ).val();
alert(value);
});
Here is fiddle url
http://jsfiddle.net/h6ye7/67/
<input type="radio" name="ans3" value="help">
<input type="radio" name="ans3" value="help1">
<input type="radio" name="ans3" value="help2">
<input type="radio" name="ans2" value="test">
<input type="radio" name="ans2" value="test1">
<input type="radio" name="ans2" value="test2">
<script type="text/javascript">
var ans3 = jq("input[name='ans3']:checked").val()
var ans2 = jq("input[name='ans2']:checked").val()
</script>
If you want a true/false value, use this:
$("input:radio[name=theme]").is(":checked")
Something like this maybe?
$("input:radio[name=theme]").click(function() {
...
});
When you click on any radio button, I believe it will end up selected, so this is going to be called for the selected radio button.
I you have more than one group of radio buttons on the same page you can also try this to get the value of radio button:
$("input:radio[type=radio]").click(function() {
var value = $(this).val();
alert(value);
});
Cheers!
can also use a CSS class to define the range of radio buttons and then use the following to determine the value
$('.radio_check:checked').val()
This worked for me..
HTML:
<input type="radio" class="radioClass" name="radioName" value="1" />Test<br/>
<input type="radio" class="radioClass" name="radioName" value="2" />Practice<br/>
<input type="radio" class="radioClass" name="radioName" value="3" />Both<br/>
Jquery:
$(".radioClass").each(function() {
if($(this).is(':checked'))
alert($(this).val());
});
Hope it helps..
$('input:radio[name=theme]').bind(
'click',
function(){
$(this).val();
});
You might notice using class selector to get value of ASP.NET RadioButton controls is always empty and here is the reason.
You create RadioButton control in ASP.NET as below:
<asp:RadioButton runat="server" ID="rbSingle" GroupName="Type" CssClass="radios" Text="Single" />
<asp:RadioButton runat="server" ID="rbDouble" GroupName="Type" CssClass="radios" Text="Double" />
<asp:RadioButton runat="server" ID="rbTriple" GroupName="Type" CssClass="radios" Text="Triple" />
And ASP.NET renders following HTML for your RadioButton
<span class="radios"><input id="Content_rbSingle" type="radio" name="ctl00$Content$Type" value="rbSingle" /><label for="Content_rbSingle">Single</label></span>
<span class="radios"><input id="Content_rbDouble" type="radio" name="ctl00$Content$Type" value="rbDouble" /><label for="Content_rbDouble">Double</label></span>
<span class="radios"><input id="Content_rbTriple" type="radio" name="ctl00$Content$Type" value="rbTriple" /><label for="Content_rbTriple">Triple</label></span>
For ASP.NET we don't want to use RadioButton control name or id because they can change for any reason out of user's hand (change in container name, form name, usercontrol name, ...) as you can see in code above.
The only remaining feasible way to get the value of the RadioButton using jQuery is using css class as mentioned in this answer to a totally unrelated question as following
$('span.radios input:radio').click(function() {
var value = $(this).val();
});
I have a html form in which I have four radio buttons and one text box. What I am trying to do is - Once I click Test4 radio button, I want to disable node textbox so that nobody can type anything in that. I don't want to hide it, I just want to disable it.
But if anybody clicks either Test1 or Test2 or Test3 then anybody can type anything into it.
Here is my jsfiddle
Is this possible to do using jquery?
Yes, this is possible; I'd suggest:
$('input[type="radio"]').change(function(){
$('#node').prop('disabled', this.value === 'test4');
});
JS Fiddle demo.
This sets the disabled property of the #node element to true (if the changed-element has the value of 'test4'), and to false if it does not.
Further to the discussion in comments (wherein, basically, the OP revealed that checking other input elements of type="radio" caused the #node element to become re-enabled), I've amended the HTML to offer a simple means of associating the appropriate inputs with the specific text-input, using data-affects. giving the following HTML:
<input type="radio" name="data" id="test1" value="test1" data-affects="nodes" />Test1
<input type="radio" name="data" id="test2" value="test2" data-affects="nodes" />Test2
<input type="radio" name="data" id="test3" value="test3" data-affects="nodes" />Test3
<input type="radio" name="data" id="test4" value="test4" data-affects="nodes" />Test4
Coupled with the amended jQuery:
$('input[type="radio"][data-affects]').change(function(){
$('#' + this.getAttribute('data-affects')).prop('disabled', this.value === 'test4');
});
JS Fiddle demo.
References:
change().
prop().
To your jsfiddle, add on the top of js this piece of code:
$("input:radio[name=data]").change(function () {
var checkedValue = $(this).val();
if (checkedValue == "test4") {
$("#node").prop("disabled", true);
} else {
$("#node").prop("disabled", false);
}
});
You can also call the radio group by id instead of name:
$("input:radio[id=data]").change(function () { //first line of code
Live example here: http://jsfiddle.net/pw9nZ/
Hope this helps you...
Theo.
I have two radio button.
and this is my jquery code to unselect the radio button when the other one becomes selected.
$("#RdbToday").click(function () {
$("#RdbDateRange").attr("checked", false);
});
$("#RdbDateRange").click(function () {
$("#RdbToday").attr("checked", false);
});
It is not working. which means that when I select the first one, the other one still on. also I can't unchecked the radio button once I checked it. why?
use .prop() instead:
$('radio_btn_selector').prop('checked', false);
Millind's answer right i am posting this alternative way you can use prop name
of html
Like this
<input type="radio" name="foo">
<input type="radio" name="foo" checked>
<input type="radio" name="foo">
See working demo
Demo
As your comment says you are using asp.net then its very simple to use groupname attribute Read here.....http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.radiobutton.groupname(v=vs.110).aspx
This question already has answers here:
How to implement "select all" check box in HTML?
(31 answers)
Closed 9 years ago.
I'm trying to have a checkbox called 'All' that when checked, also checks the rest of the checkboxes in my form. I have basically no javascript experience so sorry if this is really basic. I patched this together from looking at posts like this and this.
<script type="text/javascript">
function checkIt(checkbox)
{
document.GetElementById("1").checked = true;
document.GetElementById("2").click();
}
</script>
My HTML looks like this:
<form>
<input type="checkbox" id="A" onclick="checkIt(this)">All<br></input>
<input type="checkbox" id="1">One<br></input>
<input type="checkbox" id="2">Two<br></input>
</form>
How can I get checkboxes 1 and 2 to change when I select checkbox All? Thanks.
Since you are not familiar with javascript, I suggest looking into the jQuery javascript library. Many coders find it simpler to learn/use, and there is no debate that it requires MUCH less typing.
Here are some introductory jQuery tutorials if you are curious.
To solve your problem, I added a class to the checkboxes that you wish to automatically check/uncheck, and used that class to check/uncheck the boxes.
Working jsFiddle here
HTML:
<form>
<input type="checkbox" id="A">All<br></input>
<input type="checkbox" class="cb" id="1">One<br></input>
<input type="checkbox" class="cb" id="2">Two<br></input>
</form>
JQUERY:
$('#A').click(function() {
// alert($(this).prop('checked'));
if ($(this).is(':checked') == true) {
$('.cb').prop('checked', true);
}else{
$('.cb').prop('checked', false);
}
});
Note that this solution uses jQuery, so you need the jQuery library loaded (usually put this line in your head tags):
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>