I'm trying to build a page that has a template that contains two radio buttons. I want to make default CHECKED to one of them.
<input data-link="checkboxes" type="radio" name="checkboxes" value="true">
<input data-link="checkboxes" type="radio" name="checkboxes" value="false" checked="checked" >
and in javascript initialisation
checkboxes: true
When template renders the radio buttons that have the checked property in the source HTML are not visually checked in the browser.
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;
}
}
}
On my ASPX page, I need a server control checkbox to pass a backend variable as a parameter in its onclick JS function. But it doesn't seem to work as expected.
Please refer the two checkboxes below:
<input type="checkbox" id="Checkbox1" onclick="ToggleMyOnly('<%=gsListID %>');" />
<input type="checkbox" id="Checkbox2" runat="server" onclick="ToggleMyOnly('<%=gsListID %>');" />
Here the Checkbox1 evaluates the value of gsListID as expected. However, Checkbox2 just passes it as is.
The only difference between these two controls is that Checkbox2 is a server control.
I have searched for a solution for this issue across many sites, but did not get an answer.
I also tried converting the Checkbox1 to an ASP checkbox as follows:
<asp:CheckBox ID="CheckboxASP" runat="server" Text="test" onclick="ToggleMyOnly('<%=gsListID %>');" />
But this also did not evaluate the server tag.
Can anyone help me know how to use the server tag in "onclick" for a server control input element? (Avoiding an ASP:checkbox preferred).
You should write like below:
<asp:CheckBox runat="server" ID="chk" Text="Test" onchange="return ToggleMyOnly('<%=gsListID %>');" />
if you dont want to postback then return false from ToggleMyOnly function.
It's working from myside.
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'm new to Web development and jQuery.
I'm trying to build an ASPX page with two RadioButton controls that must perform the following actions:
On page load, one of the two must be selected depending on a flag from an object on the ASPX page. Lets call it customer.Id. If the Id is true, select RadioButton one must be set else select RadioButton 2 must be set.
At any point after page load the user selects a RadioButton, the other must be deselected.
When RadioButton two is clicked, hide a Table named "employee table" and when RadioButton one is clicked, show that Table.
Can anyone please tell me how I can get this functionality in jQuery functions?
Not sure about .NET but in Classic ASP you would write a variable like this <%=customerID%>.
In jQuery, I think you can do something like this:
<input type="radio" id="radio1"> Yes
<input type="radio" id="radio2"> No
<table border="1" id="employeeTable">
<tr><td>This is the table</td></tr>
</table>
... and then some jQuery:
$(document).ready(function() {
var customerID = <%=customerID%> // asp variable
if (customerID != "") {
$('#radio1').prop('checked', 'checked');
} else {
$('#radio2').prop('checked', 'checked');
}
$('#radio1').click(function() {
$('#employeeTable').fadeIn('fast');
})
$('#radio2').click(function() {
$('#employeeTable').fadeOut('fast');
})
})
You can have a look/play here: http://jsfiddle.net/qcLtX/7/
Try changing the customerID value to nothing, like var customerID = "".
Good luck
UPDATE
Where I have used .prop: If you are using jQuery version 1.6 or greater, you should use .prop, otherwise, use .attr.
Radio buttons are grouped by their name attribute, like so (source).
<form>
<input type="radio" name="sex" value="male" /> Male<br />
<input type="radio" name="sex" value="female" /> Female
</form>
If the radio buttons are grouped, then selecting any one of them automatically delselects all the others in that group.
So the buttons cannot have a distinct name. If you want to distinguish between radio buttons (without referring the their value), you should add an id.
<input type="radio" name="sex" id="m" value="male" />
You can set the selected radio button on page load declaratively in markup, or using jquery.
Declarative version:
<input type="radio" checked="checked" name="sex" value="male" />
jQuery:
$(document).ready(function(){
$("#m").attr("checked", "checked");
});