i have two select option list with values retrieved from db .
<select id="userid" onchange="selSuj()">
<option value="1" selected="selected">text1</option>
<option value="2">text2</option>
<option value="3">text3</option>
</select>
<select id="subject">
<div id="determineSubj">
<option value="1" selected="selected">text1</option>
<option value="2">text2</option>
<option value="3">text3</option>
</div>
</select>
<script>
function selSuj(){
var x = $('#userid').val();
$.ajax({
type:'POST',
url:'same page url',
data:{
'userid':x
},
success: function(result){
document.getElementById("determineSubj").innerHTML = result;
}
})
;
}
the first select option(userid),when option selected, should populate the corresponding values in the second select option(subject), using the user option value(eg 1,2,3) as search p.key to the subject db.
I have tried using ajax, it worked out well on alert(result), but does not update the second select option values. please help.
A select should not contain a <div>.
As we can see from this brief demo, doing so makes the div inaccessible to JavaScript, because it doesn't consider it to be a valid part of the DOM:
document.addEventListener("DOMContentLoaded", function() {
console.log(document.getElementById("determineSubj"));
});
<select id="subject">
<div id="determineSubj">
<option value="1" selected="selected">text1</option>
<option value="2">text2</option>
<option value="3">text3</option>
</div>
</select>
In any case, even if it was valid, it's entirely unnecessary for your purpose. You can just update the HTML of the select element directly.
Change the HTML to:
<select id="subject">
<option value="1" selected="selected">text1</option>
<option value="2">text2</option>
<option value="3">text3</option>
</select>
And the "success" callback to:
success: function(result) {
document.getElementById("subject").innerHTML = result;
}
and there shouldn't be any problem.
Related
I have a form that has a select field defined like this
The myName[] is like that because there are several repetitions in the sign-up form (the user first defines how many he wants to enter, and then that many forms are generated)
Now I would like to get the selected value using jQuery whenever somethign is selected, but as expected, it won't work: it's trying to get the info from an id, and there's more than one of this id. The result is that it's always getting the content of the first select field with the id it finds. I tried changing the id to a class, but that didn't work.
So how can I get the selected value of the select box that's actually triggering the event?
$(document).ready(function() {
$('#idOfmyName').change(function() {
var naam = $(this).find("option:selected").attr('value');
alert(naam);
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select name="myname[]" id="idOfmyName">
<option value="jack">Jack</option>
<option value="rose">Rose</option>
</select>
Why can't you just use $(this).val(), if you want the selected Element?
But yes, when you've got multiple of the same ID, jQuery will over ever select the first one it finds - Though you do seem to know this; I've changed it to a class in this demo
$(document).ready(function() {
$('.idOfmyName').on('change', function() {
alert($(this).val());
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select name="myname[]" class="idOfmyName">
<option value="jack">Jack</option>
<option value="rose">Rose</option>
</select>
<select name="myname[]" class="idOfmyName">
<option value="harry">Harry</option>
<option value="sally">Sally</option>
</select>
<select name="myname[]" class="idOfmyName">
<option value="edward">Edward </option>
<option value="vivian">Vivian </option>
</select>
for multiple you can do something like this
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select name="myname[]" class="idOfmyName">
<option value="jack">Jack</option>
<option value="rose">Rose</option>
</select>
<select name="myname[]" class="idOfmyName">
<option value="jack">Jack</option>
<option value="rose">Rose</option>
</select>
<script>
$(document).ready(function() {
var names = [];
$('.idOfmyName').change(function() {
var naam = $(this).find("option:selected").attr('value');
if($.inArray(naam,names)){
names.push(naam);
}
alert(names);
});
});
</script>
Vanilla JavaScript way to get selected value using onchange method
function getSelectedValue(val) {
alert(val);
}
<select name="myname[]" onchange="getSelectedValue(this.value)">
<option value="jack">Jack</option>
<option value="rose">Rose</option>
</select>
<select name="myname[]" onchange="getSelectedValue(this.value)">
<option value="harry">Harry</option>
<option value="sally">Sally</option>
</select>
I have created an HTML form that is generated from a PHP script. The PHP script outputs an HTML dropdown based on data held in a database. The number of dropdowns being displayed on the page varies as it is based on the number of lines in a MySQL database. All the dropdowns have the same ID inputDropdown
I am trying to create a jquery script that prevents the form from being submitted until all the dropdown boxes have been completed (So whenever the value doesn't equal No Response).
This is the HTML code outputted from the PHP Script. Please note the number in the name (E.G. "1" in dropdown_1) is generated based on the ID of a row in the database.
<select name="dropdown_1" id="inputDropdown" class="form-control">
<option value="No Response" selected>Blank - Please Select A Option</option>
<option value="No">No</option>
<option value="Full">Yes</option>
</select>
<select name="dropdown_2" id="inputDropdown" class="form-control">
<option value="No Response" selected>Blank - Please Select A Option</option>
<option value="No">No</option>
<option value="Full">Yes</option>
</select>
<select name="dropdown_3" id="inputDropdown" class="form-control">
<option value="No Response" selected>Blank - Please Select A Option</option>
<option value="No">No</option>
<option value="Full">Yes</option>
</select>
I tried the following jquery Code, however, this only worked for the first of the dropdowns and didn't check the other dropdown values.
$(document).ready(function () {
$("#update-form").submit(function (e) {
if ($('#inputDropdown').val() == 'No Response') {
alert('Please complete all the boxes');
}
e.preventDefault(e);
});
$("#inputDropdown").change(function () {
$("#inputDropdown").submit();
return false;
});
});
Please, could someone advise of an efficient way on how to do this?
Thank you in advance!
Your first issue is that you have repeated the same id in the DOM, which is invalid. Use a class to group the elements instead.
Then you can use filter() to find how many of the selects still have the first option selected when the form is submit. If any of them do, show the alert(). You also need to call preventDefault() at this point only. Try this:
jQuery(function($) {
$("#update-form").submit(function(e) {
var unselected = $('.inputDropdown').filter(function() {
return $(this).find('option:selected').index() == 0;
}).length;
if (unselected != 0) {
e.preventDefault(e);
alert('Please complete all the boxes');
}
});
$(".inputDropdown").change(function() {
$("#update-form").submit();
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form id="update-form" action="#">
<select name="dropdown_1" class="form-control inputDropdown">
<option value="No Response" selected>Blank - Please Select A Option</option>
<option value="No">No</option>
<option value="Full">Yes</option>
</select>
<select name="dropdown_2" class="form-control inputDropdown">
<option value="No Response" selected>Blank - Please Select A Option</option>
<option value="No">No</option>
<option value="Full">Yes</option>
</select>
<select name="dropdown_3" class="form-control inputDropdown">
<option value="No Response" selected>Blank - Please Select A Option</option>
<option value="No">No</option>
<option value="Full">Yes</option>
</select>
</form>
<select class="form-control" id="prodname" name="pname" >
<option value="0" disabled="disabled" selected="selected">-- Select Product --</option>
#{
foreach(var product in (List<tbleProdcutDetail>)ViewBag.productlist)
{
<option value="#product.Id">#product.Product_Name</option>
<option hidden>#product.Quantity</option>
}
}
</select>
I want to select this option.
<option hidden>#product.Quantity</option>
I have tried this selector but could not get text.
var productunitprice = $("#prodname option").find("hidden").text();
You can use var text = $("option:selected",this).next().text() Example below.
$("#prodname").change(function() {
var text = $("option:selected",this).next().text()
console.log(text)
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id="prodname">
<option value="1">1</option>
<option hidden>1.1</option>
<option value="2">2</option>
<option hidden>2.2</option>
</select>
As an alternative to adding many unused and hidden options.
You can add the unit price to the relevant option directly using a data attribute for example data-unit-price.
foreach(var product in (List<tbleProdcutDetail>)ViewBag.productlist)
{
<option value="#product.Id" data-unit-price="#product.Quantity">#product.Product_Name</option>
}
Then simply read it from the selected option. In my humble opinion it is cleaner and doesn't use additional hidden option elements as storage for data belonging to other options.
$(document).ready(function() {
$("#prodname").change(function() {
var productunitprice = $("option:selected", this).data('unitPrice')
console.log(productunitprice)
})
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select class="form-control" id="prodname" name="pname">
<option value="1" data-unit-price="5.25">product 45</option>
<option value="2" data-unit-price="12.99">product 94</option>
</select>
I have these SELECTs in my page
<select id="select_status_id44" name="select_status_id[44]" class="inputbox" id = "status_id_44">
<option value="1">Pending</option>
<option value="2" selected="selected">Confirmed</option>
<option value="3">Cancelled</option>
<option value="4">Refunded</option>
<option value="5">Shipped</option>
<option value="6">Paid</option>
<option value="7">Complete</option>
</select>
And also this one
<select id="select_status_id78" name="select_status_id[78]" class="inputbox" id = "status_id_44">
<option value="1">Pending</option>
<option value="2" selected="selected">Confirmed</option>
<option value="3">Cancelled</option>
<option value="4">Refunded</option>
<option value="5">Shipped</option>
<option value="6">Paid</option>
<option value="7">Complete</option>
</select>
I want to do is that whenever any of these two SELECT is CHANGED, it shoul dget the select_status_id[ID] ID inside that tag...
For now I have simply done this but it does not work
$('select[name=select_status_id]').change(function() {
alert('dsada');
});
I know that I should not get using ID attribute because they are different for both ... but NAME attribute is same
Try this way
$('select[name^="select_status_id"]').change(function() {
alert($(this).attr('name').split('[')[1].replace(']',''));
});
DEMO
You can try this on change for each select.
$("#select_status_id44").change(function(){
var val = "select_status_id["+$(this).val()+"]";
$(this).prop("name", val);
console.log(val);
});
UPDATE: Check this Fiddle : http://jsfiddle.net/JayKandari/L8TWN/1
if you can add a data-property to your select
<select data-id-value="42" ..... >
$('select').on('change', function() {
console.log ( $(this).data('id-value') );
});
I want to build a drop down menu that the second selection will be displayed if the first selection data belongs to a specific category.
As you can see below, the first selection will be about COUNTRIES. If the country selected has states, then a second drop down selection will be displayed, containing the states of that country.
1)Is there a tag (in my code "xyz") that i can use it to separate the countries in "state" and "no-state" categories? If there is, how can i read the value of the "xyz" tag?
2) If i use the:
<option class="no-state" value="Germany">Germany</option>
and then use the jQuery to read it it will give me the value GermanySpain (which is correct but not what i want)
$('.no-state').val();
HTML PART
<div id="country">
<select>
<option xyz="no-state" value="Germany">Germany</option>
<option xyz="state" value="USA">USA</option>
<option xyz="no-state" value="Spain">Spain</option>
</select>
</div>
<div id="state" style="display:none" >
<select>
<option value="Utah">Utah</option>
<option value="New York">New York</option>
<option value="California">California</option>
</select>
</div>
JQUERY PART
$(document).ready(function(){
$('#country').change(function() {
if (the value of "xyz" tag is === 'no-state')
{
$('div#state').hide();
}
else
{
$('div#state').show();
}
});
});
What can i do to address this issue?
Thanks.
Added a variable to keep if a country has states or not according your custom attribute xyz
js
$(document).ready(function(){
$('#country').change(function() {
var hasStates = $(this).find("option:selected").attr("xyz");
if (hasStates == 'no-state')
{
$('div#state').hide();
}
else
{
$('div#state').show();
}
});
});
fiddle
I think you can make use of .data() jQuery method, which reads the data-* a valid html5 attribute, but you have to change your markup to fix and use this script:
$('#country select').change(function() {
if ($(this).find('option:selected').data('xyz') === 'no-state') {
$('div#state').hide();
} else {
$('div#state').show();
}
});
You have to add a data-* prefix to get to it and make it a valid html5 attribute.
<select>
<option data-xyz="no-state" value="Germany">Germany</option>
<option data-xyz="state" value="USA">USA</option>
<option data-xyz="no-state" value="Spain">Spain</option>
</select>
Using the class attribute isn't that bad:
HTML
<select>
<option class="no-state" value="Germany">Germany</option>
<option class="state" value="USA">USA</option>
<option class="no-state" value="Spain">Spain</option>
</select>
JavaScript
$(document).ready(function(){
$('#country').change(function() {
var $sel = $(this).find("option:selected");
if ($sel.hasClass("no-state"))
{
$('div#state').hide();
}
else
{
$('div#state').show();
}
});
});
Fiddle
First of all I would change your html structure to:
<select id="country">
<option xyz="no-state" value="Germany">Germany</option>
<option xyz="state" value="USA">USA</option>
<option xyz="no-state" value="Spain">Spain</option>
</select>
<select id="state" style="display: none;">
<option value="Utah">Utah</option>
<option value="New York">New York</option>
<option value="California">California</option>
</select>
Then you can simply do:
$("#country").change(function() {
var hasState = $(this).find(':selected').attr('xyz') === "state";
$("#state").toggle(hasState);
});
Here is a fiddle to see it in action.