从下拉菜单中选择

Usually I use $("#id").val() to return the value of the selected option, but this time it doesn't work. The selected tag has the id aioConceptName

html code

<label>Name</label>
<input type="text" name="name" />
<select id="aioConceptName">
    <option>choose io</option>
    <option>roma</option>
    <option>totti</option>
</select>

For dropdown options you probably want something like this:

var conceptName = $('#aioConceptName').find(":selected").text();

The reason val() doesn't do the trick is because clicking an option doesn't change the value of the dropdown--it just adds the :selected property to the selected option which is a child of the dropdown.

I stumbled across this question and developed a more concise version of Elliot BOnneville's answer:

var conceptName = $('#aioConceptName :selected').text();

or generically:

$('#id :pseudoclass')

This saves you an extra jQuery call, selects everything in one shot, and is more clear (my opinion).

Try this for value...

$("select#id_of_select_element option").filter(":selected").val();

or this for text...

$("select#id_of_select_element option").filter(":selected").text();

<select id="form-s" multiple="multiple">
    <option selected>city1</option>
    <option selected value="c2">city2</option>
    <option value="c3">city3</option>
</select>   
<select id="aioConceptName">
    <option value="s1" selected >choose io</option>
    <option value="s2">roma </option>
    <option value="s3">totti</option>
</select>
<select id="test">
    <option value="s4">paloma</option>
    <option value="s5" selected >foo</option>
    <option value="s6">bar</option>
</select>
<script>
$('select').change(function() {
    var a=$(':selected').text(); // "city1city2choose iofoo"
    var b=$(':selected').val();  // "city1" - selects just first query !
    //but..
    var c=$(':selected').map(function(){ // ["city1","city2","choose io","foo"]
        return $(this).text();
    }); 
    var d=$(':selected').map(function(){ // ["city1","c2","s1","s5"]
        return $(this).val();
    });
    console.log(a,b,c,d);
});
</script>

Have you considered using plain old javascript?

var box = document.getElementById('aioConceptName');

conceptName = box.options[box.selectedIndex].text;

See also Getting an option text/value with JavaScript

If you are in event context, in jQuery, you can retrieve the selected option element using :
$(this).find('option:selected') like this :

$('dropdown_selector').change(function() {
    //Use $option (with the "$") to see that the variable is a jQuery object
    var $option = $(this).find('option:selected');
    //Added with the EDIT
    var value = $option.val();//to get content of "value" attrib
    var text = $option.text();//to get <option>Text</option> content
});

Edit

As mentioned by PossessWithin, My answer just answer to the question : How to select selected "Option".

Next, to get the option value, use option.val().

Set the values for each of the options

<select id="aioConceptName">
    <option value="0">choose io</option>
    <option value="1">roma</option>
    <option value="2">totti</option>
</select>

$('#aioConceptName').val() didn't work because .val() returns the value attribute. To have it work properly, the value attributes must be set on each <option>.

Now you can call $('#aioConceptName').val() instead of all this :selected voodoo being suggested by others.

$('#aioConceptName option:selected').val();

For anyone who found out that best answer don't work.

Try to use:

  $( "#aioConceptName option:selected" ).attr("value");

Works for me in recent projects so it is worth to look on it.

Using jQuery, just add a change event and get selected value or text within that handler.

If you need selected text, please use this code:

$("#aioConceptName").change(function () {
    alert($("#aioConceptName :selected").text())
});

Or if you need selected value, please use this code:

$("#aioConceptName").change(function () {
    alert($("#aioConceptName :selected").attr('value'))
});

Just this should work:

var conceptName = $('#aioConceptName').val();

Use the jQuery.val() function for select elements, too:

The .val() method is primarily used to get the values of form elements such as input, select and textarea. In the case of select elements, it returns null when no option is selected and an array containing the value of each selected option when there is at least one and it is possible to select more because the multiple attribute is present.

$(function() {
  $("#aioConceptName").on("change", function() {
    $("#debug").text($("#aioConceptName").val());
  }).trigger("change");
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

<select id="aioConceptName">
  <option>choose io</option>
  <option>roma</option>
  <option>totti</option>
</select>
<div id="debug"></div>

</div>

If you want to grab the 'value' attribute instead of the text node, this will work for you:

var conceptName = $('#aioConceptName').find(":selected").attr('value');

Reading the value (not the text) of a select:

var status = $("#Status").val();
var status = $("#Status")[0].value;
var status = $('#Status option:selected').val();

How to disable a select? in both variants, value can be changed using:

A

User can not interact with the dropdown. And he doesn't know what other options might exists.

$('#Status').prop('disabled', true);

B

User can see the options in the dropdown but all of them are disabled:

$('#Status option').attr('disabled', true);

In this case, $("#Status").val() will only work for jQuery versions smaller than 1.9.0. All other variants will work.

How to update a disabled select?

From code behind you can still update the value in your select. It is disabled only for users:

$("#Status").val(2);

In some cases you might need to fire events:

$("#Status").val(2).change();

I hope this also helps to understand better and helps try this below, $('select[id="aioConceptName[]"] option:selected').each(function(key,value){ options2[$(this).val()] = $(this).text(); console.log(JSON.stringify(options2)); });
to more details please http://www.drtuts.com/get-value-multi-select-dropdown-without-value-attribute-using-jquery/

try to this one

$(document).ready(function() {

    $("#name option").filter(function() {
        return $(this).val() == $("#firstname").val();
    }).attr('selected', true);

    $("#name").live("change", function() {

        $("#firstname").val($(this).find("option:selected").attr("value"));
    });
});


<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.3.0/jquery.min.js"></script>
<select id="name" name="name"> 
<option value="">Please select...</option> 
<option value="Elvis">Elvis</option> 
<option value="Frank">Frank</option> 
<option value="Jim">Jim</option> 
</select>

<input type="text" id="firstname" name="firstname" value="Elvis" readonly="readonly">

You can use $("#drpList").val();

Probably your best bet with this kind of scenario is to use jQuery's change method to find the currently selected value, like so:

$('#aioConceptName').change(function(){

   //get the selected val using jQuery's 'this' method and assign to a var
   var selectedVal = $(this).val();

   //perform the rest of your operations using aforementioned var

});

I prefer this method because you can then perform functions for each selected option in a given select field.

Hope that helps!

Usually you'd need to not only get the selected value, but also run some action. So why not avoid all the jQuery magic and just pass the selected value as an argument to the action call?

<select onchange="your_action(this.value)">
   <option value='*'>All</option>
   <option ... />
</select>

You can select using exact selected option : Below will give innerText

$("select#aioConceptName > option:selected").text()

While below will give you value.

$("select#aioConceptName > option:selected").val()

You can try to debug it this way:

console.log($('#aioConceptName option:selected').val())

to fetch a select with same class= name you could do this, to check if a select option is selected.

var bOK = true;
$('.optKategorien').each(function(index,el){
    if($(el).find(":selected").text() == "") {
        bOK = false;
    }
});

you should use this syntax:

var value = $('#Id :selected').val();

So try this Code:

var values = $('#aioConceptName :selected').val();

you can test in Fiddle: http://jsfiddle.net/PJT6r/9/

see about this answer in this post