I have a group of 2 asp radio controls and I want to choose one of them on ajax postback. I can put breakpoints and can tell the code is being hit, but nothing is happening. I have tried good 5-10 different variations, but nothing seems to work. The .css bit was to test that I can find the right control and that is working. The CSS gets applied.
I have tried .trigger("click") , also attr(checked="checked" and true). Have tried anything that I could find on Google. But the second option is not getting checked.
$("[main=true]").Checked = true;
$("[main=true]").css("background-color", "yellow");
Html
<asp:RadioButton GroupName="Complete" runat="server" Text="Yes" Checked="true" />
<asp:RadioButton GroupName="Complete" runat="server" Text="No" main="true" /><br />
Another minor issue I seem to be having is that if I click on the words "Yes" or "No" both option boxes get un-selected. Any reason for that?
$(window).load(function () {
$("[main=false]").prop('checked', false);
$("[main=true]").prop('checked', true);
$("[main=true]").prop('checked', true);
$("[main=true]").attr('checked', true);
$("[main=true]").Checked = true;
$("[main=true]").css("background-color", "yellow");
var id = localStorage.getItem("CustomerID");
$('img[alt = "' + id + '"]').trigger("click");
localStorage.clear();
});
The HTML out put
<span>Mark as complete:</span><span main="false">
<input id="gvCustomers_ctl07_0" type="radio" name="gvCustomers$ctl02 $Complete" value="ctl07" checked="checked" />
<label for="gvCustomers_ctl07_0">Yes</label>
</span><span main="true"><input id="gvCustomers_ctl08_0" type="radio" name="gvCustomers$ctl02$Complete" value="ctl08" />
<label for="gvCustomers_ctl08_0">No</label></span>
By the way there are more than one radio controls with main attribute set to true, but I want all of them to get selected. Not sure if that makes any difference. What doesn't make sense is that the CSS is getting applied.
I have a confusion, How can HTML be
<asp:RadioButton GroupName="Complete" runat="server" Text="Yes" Checked="true" />
According to my knowledge, No matter what programing language you use, it is first converted to HTML and then rendered in the browser.
So as much i can assume, you code will be getting converted to
<input name='Complete' type='radio' checked='true'></input>
<input name='Complete' type='radio' main='true'></input>
A very simple & naive solution to your problem will be
var elemArray=document.getElementsByName("Complete");
elemArray[0].checked=true;//For 1 radio
elemArray[1].checked=true; //For 2 radio
or you can simply iterate over the element array
for(i=0;i<elem.length;i++){
if(elem[i].hasAttribute('main')){
elem[i].checked=true;//if the second element do not have any main attribute
//or
if(elem[i].main='true'){
elem[i].checked=true;
}
}
}
I have a checkbox in an MVC project called:
#Html.CheckBox("ShowAll", true)
and then in my js I want to check if the checkbox is checked or not.
Something like
function checkboxAll(item)
{
if ((showAll).isChecked)
{
//do stuff
whats the best way? I cant seem to get the syntax right
Thanks
}
}
When using #Html.Checkbox the first parameter is the html attribute "name" that will be applied when the checkbox is created.
If you retrieve a DOM element from a html attribute you can use the following jquery:
var isChecked = $("[Name='ShowAll']").val()
P.S. I can't guarantee this is correct and will edit comment later if it is.
So if you write #Html.CheckBox("ShowAll", true) this renders a checkbox with below properties.
<input checked="checked"
id="ShowAll"
name="ShowAll"
type="checkbox"
value="true" />
Also it generates a hidden input like this:
<input name="CheckBox" type="hidden" value="true" />
Now you know how to get a field by name or id in jquery.
access value by
$("input[name='ShowAll']").val()
or is checked
$("input[name='ShowAll']").is(':checked')
or by pure js var chkbox = document.getElementsByName("ShowAll");
See the msdn page for complete overloads.
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();
});
In my form I have some TextBoxes. Once the value of TextBox is changed then corresponding RadioButton will be selected. But I want to prevent users from changing the value of RadioButton.
I tried disabling like this.
optA.Attributes.Add("disabled", "disabled");
But this script greys out the radiobutton which is not looking good. Is there any script to prevent users from clicking/changing the selected value of radiobutton?
Small example is
totalval=document.getElementById('txt1').value+document.getElementById('txt2').value
if (totalval>101)
document.getElementById('optA1').checked=true;
else if(totalval<100)
document.getElementById('optA2').checked=true;
This is what I want. So the users should not change the value of radiobuttons (optA1,optA2)
if am using
optA1.Attributes.Add("disabled", "disabled");
I couldnt get the value of optA1 at server side.
My aspx code is
<asp:RadioButton ID="optA1" GroupName="optAchieve" runat="server" Text="30" value="30" onclick="indicateColor()" />
<asp:RadioButton ID="optA2" GroupName="optAchieve" runat="server" Text="20" value="20" onclick="indicateColor()" />
Try to prevent user action by onclick event like this :
optA.Attributes.Add("onclick", "return false;");
You have to right javascript on radio button click , no matter what the radio option is selected always select the default option from javascript.
Attach a readonly class and change attribute of radio button to unchecked on each click.
<input type="radio" id="radio1" name="radio" class="readonlyradio">
<input type="radio" id="radio2" name="radio" class="readonlyradio">
Use this function in your JS:
$(".readonlyradio").click(function(){
$(this).attr('checked', false);
});
Check this fiddle:http://jsfiddle.net/Xwtvp/
Hope it helps.
I have HTML like this:
<input type="radio" name="v" value="1"> 1<br>
<input type="radio" name="v" value="2"> 2<br>
<input type="radio" name="v" value="3" checked> 3<br>
I want to know how to monitor all of those radio buttons. I could have many more than 3.
One thing I considered is to have an onclick function for all of them. Is that the right way, or is there a neater way to register a common javascript function when the radio button set has changed?
In addition to Markandey's comment: if you are using jquery, you can use attribute selectors instead of classnames without too much hassle so that you have minimal code.
$("input[name=v]").click(mycallback);
In the mycallback function, 'this' will refer to the element that was clicked.
e.g.
mycallback = function(){
alert($(this).val());
};
Putting an onclick attribute on each element creates a maintenance headache. It also prevents you from treating HTML and JavaScript as separate layers - a data layer and a behaviour layer - in the same way that CSS is your presentation layer.
Listening for events is a more mature way of developing JavaScript. Initially it takes a bit of getting used to (as it is no longer obvious from the element alone that some functionality will get triggered when you click on it) but you soon find your way around that by organising and commenting your code better.
Edited because I saw I hadn't turned the 'this' into a jquery object, and when you are in the callback 'this' is the native DOM object so .val() wouldn't work.
<input class="someclass" type="radio" name="v" value="1"> 1<br>
<input class="someclass" type="radio" name="v" value="2"> 2<br>
<input class="someclass" type="radio" name="v" value="3" checked> 3<br>
function yourcallback()
{
}
$('.someclass").click(yourcallabck);
This the way you can do using jquery
You can add an event listener to the parent of these elements. Events bubble up the DOM tree so you only need to attach one handler.
See an example here: http://jsfiddle.net/cLzBV/3/
How do I register a javascript event handler to an element that hasn't been added to the page yet...
This is a similar post with good solution how to have an 'onclick' function for all of them.
And next code I see useful for you:
document.onclick = myRadioButtonOnClickHandler;
function myRadioButtonOnClickHandler(e) {
var realTarget = e ? e.target : window.event.srcElement;
if (realTarget.nodeName.toLowerCase() === 'input' && realTarget.type === 'radio' ) {
doSomething();
}
}
Hope it helpful.
You can use Jquery add class to every radio such as "RadioClass" add jquery file to your page and use the code below...
$(document).ready(function() {
$('.RadioClass').click(function () {
alert($(this).val());
});
});