How can i get a popup on homepage like groupon or Yellowpage does. Those are not ajax ones, if i am correct. I am wondering how is it possible to display popups with good images in Asp.net website?
I have used ajax ones before without image!
Use jQuery UI Dialog.
I believe you have some misunderstanding in the concept. AJAX, by definition, is when your web application sends data to, and retrieves data from, a server asynchronously (in the background) without interfering with the display and behavior of the existing page. You may need AJAX to perform a server operation (like submitting data to the server) or update certain portion of your page smoothly without letting the user feel the flickering (and this MAY include showing a popup).
To answer your question, you need to utilize javascript, HTML, and CSS to accomplish your goal, or else you may use a ready-made library for that, in which I strongly recommend jQuery UI. Check their website for the Dialog extension:
jQuery UI Website
To open a popup in JavaScript, you can use the following:
openChildWindowWithDimensions = function(url, width, height, showMenu, canResize, showScrollbars) {
var childWindow = window.open(url, "", "\"width=" + width + ",height=" + height + ",menubar=" + (showMenu ? "1" : "0") + ",scrollbars=" + (showScrollbars ? "1" : "0") + ",resizable=" + (canResize ? "1" : "0") + "\"");
if (childWindow){
childWindow.resizeTo(width, height);
}
}
Related
I'm having trouble implementing history.js
I have a single page website that uses a jquery slider (royal slider) to slide full page divs that act as pages. The slider is operated using custom links. What I would like to do is have each link manipulate the browser history in order to 1. change the page URL. and 2. push states to the browser that are refreshable and can be navigated to and from via the browser's forward and back buttons.
What I'm not sure about is whether any pushstate will save the sliders current slide?
It's not essential if not, as the change in URL is the main thing.
Each link is controlled via a javascript click function that looks like this...
var workclick = document.getElementById('worklink');
workclick.onclick = function () {
thefooter.style.opacity = "1";
thefooter.style.filter = 'alpha(opacity=100)';
thefootdivide.style.opacity = "1";
thefootdivide.style.filter = 'alpha(opacity=100)';
$(".royalSlider").royalSlider('goTo', 1);
}
Can somebody help me with what I need to add to my page to get history.js to work with what I have here?
Thanks so much for any help
I am not an expert on History.js, but my understanding is that once it's installed, each time a slider value is changed you could call replaceState() with url parameters that reflect their values something like :
History.replaceState( null, 'My Title', '?slider1=' + $('#slider1').value );
And then, when your page loads have it read these request parameter values and (if present) set the sliders accordingly.
Again I'm not sure this is exactly what you need but I'm pretty sure it's on the right track.
Is it possible to pass the url attribute a dynamical query string? E.g url( ./SOME_IMAGE_GENERATOR?image=1 ); where image varies?
I need this attribute to be set via JS:
$( "#elem" )[ 0 ].style.background = "url( ./renders/circuit.php?circuit=" + dirY + dirX + "&dims=1|1 )";
The link in the url points to a file, that generates and returns an image.
The image is generated correctly, but not applied as backround.
Clarification
The image I want to put inside does not exist yet. It is generated and returned by the page circuits.php and depends on the arguments.
The background is well changed, if the image exists. I have noticed that unlike changin the src attribute of the img tag, while the argument creates a request by the browser, sends and recieves headers and info, the background does not.
I'd thought about sending a request to the circuit.php generator, make him save the image on the server and then, with setTimeout, change the background, but I cannot rely on a certain time for the generation.
That is the problem. Now, do you guys have any ideas how to overtake this?
Working Example
I've replicated your scenario with a Jsfiddle and a image generating script held on my own website.
As you can see it is indeed possible to change the background dynamically with a generated image:
http://jsfiddle.net/DigitalBiscuits/Eh8yY/6/
Debugging your code
So....what's wrong with yours?
Well firstly if you're using Firefox or Chrome, use the developer tools to check what's going on. Make sure no Javascript errors are showing up in the console.
Then I would suggest you check that your javascript is actually selecting the element, and that it is able to change the background (lets say to a static image). Isolate the code you that's giving you problems and test it out in a new empty page, kinda like the JSfiddle I've linked you to above.
On a side note, your javascript code looks a bit foreign to me.
Instead of:
$( "#elem" )[ 0 ].style.background = ...
try using:
document.getElementById('myImg').style.background = ...
Lastly, ensure that you're setting the correct headers in your php script that generates the images, and that no output is happening before the headers are set.
Are you using jQuery?
This should be very easy to do.
Store the generated image url in a variable, and then use jQuery to change the CSS background image value, like so:
var imageUrl = "./renders/circuit.php?circuit=" + dirY + dirX + "&dims=1|1";
$('#myDiv').css('background-image', 'url(' + imageUrl + ')');
Here's a a jsfiddle demonstrating the concept. Click the div to see the background-image dynamically changed via JS.
http://jsfiddle.net/DigitalBiscuits/F3PUy/2/
Yes its possible to set on-the-fly images as background images, using CSS.
This is no different to how you can use on-the-fly images for img elements.
I am displaying a message in my ASP.NET from code-behind using this:
Response.Write("<script>alert('Hello')</script>");
When the OK button is pressed on the message box, the whole layout of the web page shifts a little towards the right direction. What is wrong? Is something else to be added?
private void alert(string Msg)
{
Response.Write("<script language = 'javascript'>window.alert('" + Msg + "')</script>");
}
try the previos method ..
if u want cool messages try the following link:
Produce "toast" messages like StackOverflow
Could it be that the scrollbars get visible when the popup is active? It has happened a few times for me and I thought the style was getting messed up, but it was just the scrollbars becoming visible and disappearing :) They shift the page a little.
At the risk of getting dinged for providing an additional answer to an "answered" question, I think others coming across this question should be advised as a matter of course that hard-coding HTML strings through Response.Write in ASP.NET applications is an increasingly frowned-upon practice for precisely the reason you've observed - the page rendering emits HTML that has no way of accounting for interjected Response.Write statements, risking all manner of layout grief.
just need tips on how to make forms where request are submitted via AJAX with a loading progress image. I am using update panels with AJAX framework. I would like to know about the recommended approach. Through JQuery or AJAX toolkit ?
Please advice, examples would be an added bonus for me.
1- Prepare a client side div with "display:none" style property. put your loading image inside.
2 - when the user or page submits a request, change that divs display property to "block".
3- Add some kind of "information received" sign to the response and check this response from the client side and then change that divs display property back to "none"
I would like to know about the
recommended approach
Well, that depends on what you are doing, what parts of the form are you updating, how big is the form, what values are you sending to the server.
Generally speaking, if you want to update something simple (dropdownlist, listbox, etc), youd generally use JavaScript (or jQuery) to call an AJAX-enabled web service. This way, you're only sending to the server the data it needs, things like ViewState/cookies are not sent over the wire. You also have full control over the pre/post execution events (so you can add your loading images, call the WS, then clear them).
However, if you want to asynchronously update an entire form (which has a lot of controls), you're probably right in using an UpdatePanel. Things like a GridView are a good case for an UpdatePanel (as you usually need to handle editing, binding and paging all asynchronously).
The progress image is made easy with the following code:
<ProgressTemplate>
<img src="someloadingimage.gif" alt="Loading" />
</ProgressTemplate>
Stick that inside your UpdatePanel, and whenever an AJAX call is made, the loading image will be shown.
HTH
If you use JQuery for AJAX request then you can use the following events -
$.ajax({ url: "test.html",
type: "GET",
beforeSend: function(){
-----load your loader here-----
});,
success: function(){
------remove your loader here -----------
Remaining code
}});
You can also use POST. in above example i have used GET.
For detailed documentation you can refer - http://api.jquery.com/jQuery.ajax/
Create a small plug-in for your loader like so.
$.fn.ShowLoader = function(on){
switch(on)
{
case true:
$(this).show();
break;
default:
$(this).hide();
break;
}
}
then use the following:
$('form').submit(function(){
var Form = $(this);
$('.loader',Form).ShowLoader(true);
//Gather some params
Location = Form.attr('src');
Data = Form.Serialize();
$.post(Location,Data,function(result){
result = result || false;
if(result)
{
$('.loader',Form).ShowLoader(false); //Disable the loader
//Process result
}
});
})
html would just be a regular form, with an image / div inside with the class of loader
I've inherited some code that I need to debug. It isn't working at present. My task is to get it to work. No other requirements have been given to me. No, this isn't homework, this is a maintenance nightmare job.
ASP.Net (Framework 3.5), C#, jQuery 1.4.2. This project makes heavy use of jQuery and AJAX. There is a drop down on a page that, when an item is chosen, is supposed to add that item (it's a user) to an object in the database.
To accomplish this, the previous programmer first, on page load, dynamically loads the entire page through AJAX. To do this, he's got 5 div's, and each one is loaded from a jQuery call to a different full page in the website.
Somehow, the HTML and BODY and all the other stuff is stripped out and the contents of the div are loaded with the content of the aspx page. Which seems incredibly wrong to me since it relies on the browser to magically strip out html, head, body, form tags and merge with the existing html head body form tags.
Also, as the "content" page is returned as a string, the previous programmer has this code running on it before it is appended to the div:
function CleanupResponseText(responseText, uniqueName) {
responseText = responseText.replace("theForm.submit();", "SubmitSubForm(theForm, $(theForm).parent());");
responseText = responseText.replace(new RegExp("theForm", "g"), uniqueName);
responseText = responseText.replace(new RegExp("doPostBack", "g"), "doPostBack" + uniqueName);
return responseText;
}
When the dropdown itself fires it's onchange event, here is the code that gets fired:
function SubmitSubForm(form, container) {
//ShowLoading(container);
$(form).ajaxSubmit( {
url: $(form).attr("action"),
success: function(responseText) {
$(container).html(CleanupResponseText(responseText, form.id));
$("form", container).css("margin-top", "0").css("padding-top", "0");
//HideLoading(container);
}
}
);
}
This blows up in IE, with the message that "Microsoft JScript runtime error: Object doesn't support this property or method" -- which, I think, has to be that $(form).ajaxSubmit method doesn't exist.
What is this code really trying to do? I am so turned around right now that I think my only option is to scrap everything and start over. But I'd rather not do that unless necessary.
Is this code good? Is it working against .Net, and is that why we are having issues?
A google search for
jquery ajax submit
reveals the jQuery Form Plugin. Given that, is that file included on your page where the other code will have access to the method? Does this code work in Firefox and not IE?
Seems like there was too much jQuery fun going on. I completely reworked the entire code block since it was poorly designed in the first place.