Develop Reference

Select the changes of a textbox that was disabled from code behind in jQuery

I have a page with a asp:textBox.
In my code behind (VB.net) in the Page Load, depending on such filters, i'm going to enable/disable this asp:textBox in this way:
this.txtB.Enabled = true;
this.txtB.Enabled = false;
In the moment that the user change the context of this asp:Textbox (only if it's enabled) i want to do some stuff, and so i thought to use jQuery in this way:
$('.txtB:enabled').on("propertychange input paste", function () { ... });
The problem is that, in some cases, the textBox that in the beginning was disabled had to become enabled too. And i do that always in jQuery:
$(".txt_PISocAppNom").prop('disabled', false);
But in this case when then the user change the context of the textBox, the previous method didn't catch the changes.
I assume that the problem derive from the fact that in my code behind i'm setting the ENABLE attribute and in jQuery the DISABLE attribut.
I don't know if my supposition is correct and in that case how to change the code to make it work.

Have you tried using 'live' instead of 'on'?
$('.txtB:enabled').live("propertychange input paste", function () { ... });
If your textbox is disabled at the beginning the selector '.txtB:enabled' won't apply to it so the change event will not get attached to it. Using 'live' will make sure that the event also gets attached for the future elements.
'live' has been deprecated in the new versions of jquery. In jquery 1.7+ you can also use $('.parentB').on("propertychange input paste", ".txtB:enabled", function () { ... }); to get the same result as 'live'. I'm using '.parentB' as a selector to get the parent of your textbox.

The problem was that i inserted the
$(".txtB:enabled").on("propertychange input paste", function () { ... });
in the
$(document).ready(function () { ... });
In that case, it was attacked in the early stages only to those items that were enabled. So, if my textbox was at first disabled, and enabled only later it hadn't the .on(...) property.

Press button dynamically created to show hidden radio option list

In
<script>
$all_hier_radio.on("change", function() {
// Grab an input radio checked handler
// Hide the radio options
$all_hier_div.hide();
$all_hier_radio.hide();
// Create a button to be added to another div like this:
$hierarq_but = $("<button/>", {
text: $hier_div_checked_id.text(),
type: "button",
id: "btn_hier",
});
// Append the button to another div
Whe a user selects one of the options, the list gets no visible, so it's fine.
But, I'd like that when a user clicks that button, the previously hidden radio option list could be displayed again
$("button#btn_hier").bind("click", resetHierarquia());
</script>
And in another file,
function resetHierarquia() {
console.log("RRRRRREEEESSSSEETT");
//$(this).preventDefault();
//$(this).stopPropagation();
$all_hier_div.show();
$all_hier_radio.show();
}
But I dont' get the desired effect. Please take into consideration that I'm delving into javascript for the first time...

The problem is this line:
$("button#btn_hier").bind("click", resetHierarquia());
It should be like this:
$("button#btn_hier").bind("click", resetHierarquia);
It's because you don't want to call the function resetHierarquia but pass it in parameter to the event listener.

Getting the name of a hyperlink when it's clicked using jQuery

Is there a way to get the hyperlink name when you click on it using jQuery? I have the following code, I need some jQuery direction:
<a href="#" id="imageClick" name='<%# Eval("fileName1") %>'><asp:Image ID="myImage" name='<%# Eval("fileName1") %>' runat="server" ImageUrl='<%#"~/Image/" + Eval("fileName") %>' /></a>
Basically I would like to return the value of whatever <%# Eval("fileName1") %> is.
Thanks.
EDIT: To be more clear, I have a popup page which contains a listView which that has images and radio buttons. The requirement is if you click on the radio button, it should get the value of that specific choice and close the popup. I'm also passing a value back to the parent window. So this is what I have:
$(document).ready(function () {
$("#form1").change(function () {
var val = "";
if ($('input:radio[name=myRadio]:checked').val()) {
val = $('input:radio[name=myRadio]:checked').val();
}
if (val != "") {
$(window.opener.document).find('#txtLogos').val(val);
// Close the window
window.close();
}
});
});
This works fine when I click on one of the radio buttons. But now they added another requirement that if they click on the images they want the same result (Obviously without disrupting the functionality that the radio button has).

You can just access it using this.name inside your click handler. this here is the Dom element (Don't need jquery to retrieve the element attribute value), so just directly access the name attribute of the element.
$('#imageClick').click(function(){
alert(this.name);
});
Edit
Form change will not be triggered if you click on an image; unlike input, select, textarea etc. So you need to trigger form change manually on image click event (to simulate a radio button click triggering the form change event).
Bind a click handler to your images to add class:
$('yourimageselector').click(function(){
$(this).toggleClass('checkedImage'); // Add a class on first click and again clicked on it remove the class to say it is turned off. If you dont want a turn off functionality simply say :
//$(this).addClass('checkedImage'); //or if this is the only class then this.className = 'checkedImage' classList is not yet supported in all browsers.
$('yourform').change(); //as this is image it wont trigger form change event so you need to manually trigger form's change event (only for input, select, textarea etc form change will be triggered).
});
And in your form event:
$("#form1").change(function () {
var imgNames= $('.checkedImage')
.map(function(){return this.name; })
.get(); // Will get you all the image names in an array.
//if it is just one image then simply do if($('.checkedImage').length > 0) $('.checkedImage')[0].name,
//Code follows
});
Fiddle

this can also work in the event handler of your click :
document.getElementById("new-answer-activity").name

changing the class of an html element using javascript is unstable

I used this code to change the class of an html-element when an onclick-event occurs. The change occurs(i.e. the text color changes) but the change is not stable, it goes back to the styling of its previous class, and my javascript code doesn't seem to have any effect.
function submitrequest(){
var x = document.forms["signupform"]["name"].value;
if(x.toString().length <= 0){
var y = document.getElementById("nametd");
y.className = 'change';
}
}
What should I do to make this effect permanent?

You do not have to define a click-handler to notice that a button of a form was clicked.
A form can have an submit-button:
and when this button is clicked an submit event is fired for the form.
Furthermore when an user do not clicks on the button and just presses enter then a submit-event is fired too. So you handle both situations automatically.
I suggest that you define you function that way:
window.onload = function(){
document.getElementById('signupform').addEventListener('submit',function(e){
changeClassOfNametd();
e.preventDefault(); // this prevents the side from being reloaded by the script.
});
};
function changeClassOfNametd(){
var nameValue = document.forms["signupform"]["name"].value;
if(nameValue){ // when value is "" (zero, no signs) it is false anyway
var y = document.getElementById("nametd");
y.className = 'change';
//y.classList.toggle('change'); you can toggle classname "change" too
// which works that way class="unchange" -> class="unchange change"
// you have to define appropriate css-classes for toggle.
}
}
The Code above works whereever you put it into your html-file.

By the name of the function it is called on a form submission.
Because the form submits and it goes back to the original that was set when the new page loads.
If you want to maintain that, you would have to apply the class on the next page load. Most developers will do that with the serverside. If you do not actually want the form to submit, cancel it.

Override parrents onClick event with checkbox onClick?

First, sorry for my bad English.
I'm making a Coupons site and have trouble with selecting and deselecting the coupons. Each coupon is in a DIV 'box' in which there is a checkbox.
I made a onClick function on the DIV box (so the user can select the coupon by clicking on anything inside the DIV box. What I need now is, when the user want to deselect the coupon (by clicking on the checkbox inside the DIV box), I need to 'override' the DIV's onClick function (execute the checkbox onClick event, not the DIV's onClick event).
I know that everyone prefers some code as an example, but the question/problem is simple and I don't think you need all of my un'useless code inside the events/functions :)
Thanks :)

It seems like you want stopPropagation if the checkbox is being unchecked: http://jsfiddle.net/8Dcq8/.
$("div").click(function() {
alert("add"); // clicking anywhere in div to add coupon
});
$(":checkbox").click(function(e) {
if(!this.checked) { // if unchecking, remove coupon
alert("remove");
e.stopPropagation(); // don't run parent onclick
}
});

If the <div> click handler looks something like this:
var $boxes = $('div.box');
$boxes.on('click', function ()
{
// do whatever to select the coupon
});
Then the checkbox handler should look something like this:
$boxes.find('input[type="checkbox"]').on('click', function (event)
{
event.stopPropagation();
// do whatever to deselect the coupon
});
See event.stopPropagation().

You have to cancel bubbling. See here for an explanation.

You can use the jQuery Alternative, or create sub-elements with onClicks that don't target your checkbox. you might be able to use something like this also.
document.getElementById('element').checked.onreadystatechange=function(){
//code
}
good luck