After an ajax call, I want to inject some element (list) in page. For each element of the list, I want to attach t:pagelink. I use PrototypeJs as js framework. Have you any idea?
I have already test the code below but doesn't work (it not render the t:pagelink)
new Ajax.Request('my_service_url', {
onSuccess: function(response) {
response.responseJSON.data.each(function(item){
var li = '<li>'+
'<span>'+item.title+'</span>'+
'<t:pagelink page="examples/navigation/PageLinks2">'+item.link+'</t:pagelink>'+
'</li>';
$('mylist').insert(li);
});
}
});
Thanks for your reply but I've found the solution. Just use processReply and it's ok. Indeed, the response needed a bit modification.
This does not work with Tapestry, as Lance Java pointed out, because the Javascript snippet is executed on the client. The client can't submit the <t:pagelink> tag to Tapestry for interpretation.
What you need to do instead is use the Ajax semantic of Tapestry, in particular the Zone component. <t:zone>...</t:zone> defines a section of your HTML document which will be replaced with a new version, rendered from .tml to html by Tapestry.
So in your <t:zone>, add <t:pagelink>'s as needed, probably dynamically, based on some condition or in some loop (i.e. with <t:if> or <t:loop> tags). Then, use some mechanism to send an AJAX event back to Tapestry. One simple option would be to use <t:actionlink zone="[ID of your zone]">.
See here for more info on Zones.
Related
In MVC4 applications, I would like to update a panel using AJAX but using jQuery methods instead using AjaxExtensions from MVC.
But my problem is the updatePanelId.
I've seen several people use this to update it when has success:
success: function (response) {
var $target = $("#target");
var $newHtml = response;
$target.replaceWith($newHtml);
}
But when I do this, it forces me to use in every partial view that includes the id="target" at the root level of my razor view, and I guess that's not a good practice; I said this because I've realized when I use AjaxExtensions it doesn't happens, replace the update and it does not remove the panelId. But using jQuery it does.
Any idea to port the AjaxExtensions feature to jQuery?
You can use just:
$("#target").html(response); // it will just update content of the $("#target") container
Use jQuery's .load function. This will load the contents of the URL you specify into the target element. You can optionally specify a selector after the URL in load to only grab part of the target page.
$(function() {
$("#target").load("/MyURL");
});
JavaScript same origin policy applies to this.
I have button with id = new which loads the new page
$("#new").click(function(){
$('#message_area').load('new.php');
});
There is a button in new.php which sends message to database. But i have a problem with it , it only works for first time when page loads if i navigate to some other links via ajax and again load new.php using above code then send button in new.php does not work i have to refresh the page then it works. I think its because the send button in new.php is added after DOM is created for first time .
Please help Thanks in advance ..
You will need to post more details of your markup for a more accurate answer, but the general idea is to use event delegation. Bind the event handler to an ancestor of the button that does not get removed from the DOM. For example:
$("#message_area").on("click", "#yourButton", function() {
//Do stuff
});
This works because DOM events bubble up the tree, through all of an elements ancestors. Here you are simply capturing the event higher up the tree and checking if it originated from something you are interested in (#yourButton).
See jQuery .on for more. Note that if you're using a version of jQuery below 1.7, you will need to use delegate instead.
//jquery >= v1.7
$("body").on('click', '#new', function(){
$('#message_area').load('new.php');
});
//jquery < v1.7
$("#new").live('click',function(){
$('#message_area').load('new.php');
});
$("#new").live("click", function(){
$('#message_area').load('new.php');
});
just realized this was deprecated-- should be using on instead.. my bad.
To manage dynamically created elements like this, you need to use .on() (jQuery 1.7 and above) or .delegate() (jQuery 1.4.3 and above) to assign the events. Seems everyone has beaten me to the code, but I'll post this for the links to the functions.
I'm looking for a way to load a part of an external page (possibly selected by an id in the external page) into a div. Something similar to Ajax.Updater, but with the option of specifying an id to look for in the external page.
Does anything like this exist in prototype. I've been googling for examples without luck. If I can't find it soon I'll have to do some "gymnastics" with Ajax.Request and some function tied to onSuccess.
You could do something like this, though it is by no means an elegant solution.
new Ajax.Updater("container", 'www.babes.com', {
onSuccess: function() {
$("container").update( $('idOfSomeLoadedElement') );
}
});
I don't think there is an actual elegant way of doing this purely in js. Ideally, you'd make your AJAX request only for what you need. You might be able to do some server-side stuff to lop out what you don't need (basically, offload the onsuccess functionality above to the server).
Instead of AJAX you might get by with an iframe.
// dollar function calls Element.extend
var iframe = $(document.createElement('iframe'));
// control how and what it loads
iframe.addEventListener('onLoad', function() {
$('container').update(iframe.contentDocument.select('#someID').first());
});
iframe.setAttribute('src', 'http://URL');
// add it as invisible, content isn't loaded until then
iframe.setAttribute('hidden', true);
document.body.appendChild(iframe);
From a minimal test it's clear that you'll have to be as concious about cross-origin policies as any AJAX method, that is, it's a PITA.
hi
sorry for the bad title but I'm not 100% sure what I need for this problem
I created a welcome page and then when you click on links you get more information, for example:
Click Me
And then the php would get the information based on the id.
so the information received is reloaded on the page after the pages refreshes
what I would like to be able to do is when user clicks on the link, use jquery to not allow the link to run but still run the url in the background (without refreshing the page)
I have no idea where to start from so I really hope you could help
thanks
In a nutshell, it's called Ajax: sending an HTTP request to your server through javaScript, and receiving a response which can contain results, data, or other information.
You mention jQuery, here are the docs about that:
http://api.jquery.com/jQuery.get/
http://api.jquery.com/jQuery.post/
are convenience methods, which encapsulate $.ajax with preset options.
http://api.jquery.com/category/ajax/ is an overview of the whole system in jQuery.
The basics go like
//include jquery, etc.
$(document).ready(function(){
$('#some_element').click(function(){
$.get('some_url_on_your_server.php',{'data':'whatever params'},function(data){
do_something();//
},'json');
});
This will bind an element to make an Ajax call on click, and then you use the function ('success' function, in $.ajax) to handle the json data.
Have your server send back the data in JSON by using json_encode in php. Be sure to send the right header back, like
<?php
header('Content-Type: application/json');
echo json_encode($some_array);
exit;
There's a lot of resources on the web and SO for learning about Ajax, it's a big topic. Best of luck.
Make a JavaScript function, like sendData(linkId) and then each tag would have an onclick event called sendData(this). SendData(linkId) can then do an HTTPRequest (also known as an asynchronous or AJAX request) to a php file, let's call it handler.php, which receives GET or POST methods. I prefer using the prototype framework to do this kind of thing (you can get it at prototypejs.org).
Okay, now that I have said all that, let's look into the nitty-gritty of how to do this (way simplified for illustrative purposes).
Download the prototype script, save it on your server (like prototype/prototype.js, for example) and then put somewhere in your html <script type='text/javascript' language='Javascript' src='prototype/prototype.js'></script>
Your tags would look like this:<a id='exampleLink' onclick = 'sendData(this)'>Click me!</a>
You need JavaScript to do this: function sendData(tagId){
var url = 'handler.php?' + 'id=' + tagId;
var request = new AJAX.Request(url, {method = 'get'});
}
Finally, you need a php file (let's call it handler.php) that has the following: <?php
$tag_to_get = $_GET['tagId'];
do_a_php_function($tag_to_get);
?>
That's it in a nutshell, but it's worth mentioning that you should give your user some sort of feedback that clicking link did something. Otherwise he will click the link furiously waiting for something to happen, when it is actually doing just what its supposed to but in secret. You do that by making your php script echo something at the end, like 'Success!', and then add an onSuccess parameter to your JavaScript's new Ajax.Request. I'll let you read how to do that on your own because the prototype website explains how to receive a response from the handler and put the feedback somewhere in your HTML without making the user refresh.
you can achieve that behavior with a jquery function called $.get ... you can get more information on how to use here http://api.jquery.com/jQuery.get/
If you really want to (and I don't think you really do), you can use XMLHTTPRequest (wrapped in jQuery.get) to facilitate loading content into the page without page refreshing. You want an id or class on that tag, i.e. Click Me, and then:
<script>
$(".fetch").bind("click", function(evt)
{
$.get(this.attr("href"), function(data)
{
$("#whereIWantMyContent").html(data);
});
evt.preventDefault();
});
</script>
I would recommend you use AJAX to start with. A good place to being is http://www.w3schools.com/Ajax/Default.Asp
The link comes with a handy AJAX ASP/PHP Example too =))
Good Luck.
I'm in the process of converting my web app to a fully AJAX architecture.
I have my master page that is initially loaded and a div container that is loaded with dynamic content.
I created a few jQuery plugins that I apply to certain elements in order to extend their functionality. I'd normally call the functions as follows during each page load:
$(document).ready(function () {
// Enable fancy AJAX search
$(".entity-search-table").EntitySearch();
});
This would find the appropriate div(s) and call the plugin to enable the necessary functionality.
In an AJAX environment I can't just apply the plugin during the page load since elements will be added and removed dynamically.
I'd like to do something like this:
$(document).ready(function () {
// Enable fancy AJAX search
$(".entity-search-table").live("load", function () {
$(this).EntitySearch();
});
});
Question: Is there any way that I can trigger an event when a <div> or other element that matches a selector is added to the DOM?
It seems incredibly wasteful to activate the plug-in every time an AJAX request completes. The plug-in only needs to be applied to the element once when it is first added to the DOM.
Thanks for any help!
Yes - take a look at liveQuery. Example:
$('.entity-search-table').livequery(function(){
$(this).EntitySearch();
});
It seems incredibly wasteful to activate the plug-in every time an AJAX request completes. The plug-in only needs to be applied to the element once when it is first added to the DOM.
You can get the best of both worlds here, for example:
$("#something").load("url", function() {
$(".entity-search-table", this).EntitySearch();
});
This way it's only applying the plugin to the .entity-search-table elements you just loaded, since we specified a context to $(selector, context) to limit it.
The DOM 2 MutationEvent is what you really want, but unfortunately it isn't supported by IE. You'll need to either use live()/ delegate() binding in the plug-in, or (as I did when I had to work around this) use callbacks from your AJAX loaders indicating the scope of what has changed.
Use the live binding in your plugin code directly
jQuery.fn.EntitySearch = function() {
this.live(..., function(){ your plugin code });
return this;
}