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• Never render a layout in response to xhrs

  - by Horace Loeb

  Most of the time I don't want to render a layout when the request comes from AJAX. To this end I've been writing render :layout => !request.xhr? frequently in my controller actions. How can I make this the default? I.e., I'd like to be able to write def new Post.find(params[:id]) end and have the functionality be def show Post.find(params[:id]) render :layout => !request.xhr? end (I'm fine manually specifying a layout in the rare cases in which I want to use one.)

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• Sample code for image upload

  - by Michael

  Hi, In would like to write a simple Android application that takes a picture from the camera and uploads it to a webserver. Additionaly, I would like it to print in the screen the response from the server wich is a simple text string. Do you know if there is any sample code that does something like that? Thank you, Michael

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• pass form builder in remote_function in rails ?

  - by richard moss

  hi all i have select box where on change i need to grab the value and via remote function get some field names from db and then generate those field further down the form depwning on whatoption from the select box is chosen. The problem is is that the fields are in a f.form_for so are using the formbuilder f that has the select box in. So when i render the partial via ajax in the controller i get an error as i dont have a reference to the local form builder f. does anyone know how or if i can get reference to the form builder orif can pass it in a remote function call and then pass into my locals in the partial ? thanks alot, any help will be great as been stuck on this a long time! cheers rick

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• HTTP POST prarameters order / REST urls

  - by pq

  Let's say that I'm uploading a large file via a POST HTTP request. Let's also say that I have another parameter (other than the file) that names the resource which the file is updating. The resource cannot be not part of the URL the way you can do it with REST (e.g. foo.com/bar/123). Let's say this is due to a combination of technical and political reasons. The server needs to ignore the file if the resource name is invalid or, say, the IP address and/or the logged in user are not authorized to update the resource. Looks like, if this POST came from an HTML form that contains the resource name first and file field second, for most (all?) browsers, this order is preserved in the POST request. But it would be naive to fully rely on that, no? In other words the order of HTTP parameters is insignificant and a client is free to construct the POST in any order. Isn't that true? Which means that, at least in theory, the server may end up storing the whole large file before it can deny the request. It seems to me that this is a clear case where RESTful urls have an advantage, since you don't have to look at the POST content to perform certain authorization/error checking on the request. Do you agree? What are your thoughts, experiences?

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• Alert show when extension of FileUpLoads are not allowed

  - by Vy Clarks

  I have a asp FileUpload control in my aspx page. And the code behind to check file's extension and then insert them into database: private string Write(HttpPostedFile file, string table) { string fileNameMain = Path.GetFileName(file.FileName); // check for the valid file extension string fileExtension = Path.GetExtension(fileNameMain).ToLower(); if (fileExtension.Equals(".pdf") || fileExtension.Equals(".doc")) { ...insert fileupload into database } else { LabelError.Text = "Extension of files are not allowed."; return null; } } With the code above, it checks the extension and then show the message "Extension of files are not allowed." in a LabelError if the fileupload is not allowed. Now, I'm required to do the "check-extension" in the other way: at the moment the client click and choose FileUpload, an alert show "Extension of files are not allowed.". I need a way to make an alert show at the momment the FileUpload choosed in browser. Help!!!!

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• Getting a scriptmanager into a dynamically rendered page

  - by AndreasKnudsen

  Hi, We are rendering usercontrols dynamically like this: public string RenderControl(string pathcontrol) { string html; var page = new Page(); var control = page.LoadControl(path); page.Controls.Add(control); // do stuff to the control (give it some data to work on) using (var writer = new StringWriter()) { HttpContext.Current.Server.Execute(page, writer, false); html = writer.ToString(); } return html; } This lets us the same user controls when rendering pages normally as we do when rendering responses to ajax calls. However, when adding controls which themselves contain a scriptmanagerProxy we run into the problem that the newed up Page object doesn't contain either a ScriptManager or the HtmlForm in which the ScriptManager needs to run. Is there any way around this? Yours Andreas

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• Communication between Page and User Controls

  - by Narmatha Balasundaram

  I have a main page that has multiple user controls on it. All the user controls have static text and some data to be retrieved from the DB. The aysnchronous DB call is clubbed at the page level and one call is made to avoid multiple calls (in the different user controls) to get the same data. I want the page and user controls to load initially with the static text and later refresh the contents obtained from the server. To sum it all up, Page Loads = Asyn calls fired on page load = Data received back from the server (XML/text/whatever) = User controls to load with this data using AJAX. What methods do I have to let the user controls know that I have the data from the server and they need to update with this data?

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• Image resizing client-side with javascript before upload to the server

  - by geraud

  I would like to know if it is technically possible to resize an image at a client-side with javascript (really resize, not just change width and height). I know it's possible to do it in flash but I would like to avoid it if possible. Is there any open source algorithm somewhere on the web?

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• XMLHttpRequest error in IE, works without issue in Chrome/FF

  - by culov

  function addRequest(req) { try { request = new XMLHttpRequest(); } catch (e) { try{ request = new ActiveXObject("Msxml2.XMLHTTP"); }catch(e){ try { request = new ActiveXObject("Microsoft.XMLHttp"); } catch (e) { alert("XMLHttpRequest error: " + e); } } } request.open("GET", req, true); request.send(null); return request; } As you can see, it IE apparently fails all 3 ways in which I try to make the request. I've been doing plenty of searches to try and find what may be the issue, but by all accounts ive read, the code ive posted above should work. i havent used jquery for AJAX, but ive seen it recommended when others have had issues with httprequest objects. could i just replace the mess above with a couple lines of jquery and assume that it will take care of IE's ugliness? Thanks!

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• Creating client-side dynamic dependent controls , interactive user interface

  - by igor

  Hello everyone! I am looking for client-side javascript plugin for jquery(prefered, or maybe other framework) or other javascript framework, that implements dynamic, interactive user interface (fig. 1) Requirements: 1) user interface shall be dynamic (client-side, javascript). 2) the displaying of the next control shall be dependent on input of previous control(s) 3) the dependency shall be implemented in declarative form (settings, mapping, xml...) 4) this scope of controls shall be supported: dropdown list - fixed list (static, list of items has fixed scope of items) edit input (loop-up) - dynamic list, dependent on user input dropdown list - fixed list (dynamic, list of items dependent on previous input) static structure controls to display dynamic data. 5) this scope of dependencies shall be implemented: one-way: one to one one-way: one to many 6) this scope of dependency actions shall be implemented: hide (remove) control show (add) control show disabled set default value 7) controls shall be filled in by using ajax requests to the server-side application (json, xml...) Any thoughts, references, I would appreciate any assistance. Fig. 1. Interactive user interface

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• Django, javascript and code reuse problem

  - by dragoon

  Hi, I have some sort of a design problem with my Django AJAX application. I have a template where I initialize js variable from django context variable like so: var test = "{{ test }}"; This variable is than used in a number of js functions that are needed for interface to work properly. So now I'm trying to reuse some content from this page in another page that loads it dynamically on some user interaction using jQuery.load(..), and I don't see any way how I can initialize that variable, so js functions don't work now. Is there any solution for this or may be I'm doing it wrong? Thanks.

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• Javascript Call function serverside

  - by Dusty

  I need to call a Javascript function from the server side in Client side. I looked and didn't find any way how to do it. I looked also over AJAX but can't figure it out. I am using ASP ( clasic) not .net . I need to call the function in client-side with a variable that comes from the client-side. Please help me!!! Thanks a million !!! I am using a FlashMovies that is sending a value to a Javascript function through ExternalInterface class. The function in javascript receiving it is gAnswer(result) and in this function i would need to have something like : Server side: function saveResult(result) {code to be saved on the server goes here } Client side : function gAnswer (result) { saveResult(result) } <- THis is the part i dont know how to do. The function gAnswer is being called when the flash movie finished by itself. Would you be able to provide some code on how to ? thanks to each one of you who helped me =)

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• Jquery Text Variable

  - by Batfan

  I am trying to get jquery to pick up variable that I am defining and I'm having issues doing it. $.ajax({ url: "sitemap.php", cache: false, success: function(html){ $("#results").append(html); var $seriestitle = $("#define-title").text(); $('#results a:contains("$seriestitle")').addClass('current-series'); $('a:not(".current-series")').hide(); } }); This is the code I am using. You can view the page at the following URL: http://benjammindesigns.com/XML/details/1231.html There is a span on the page, with the ID 'define-title', that contains text. I am trying to pull the text from that span and use it as my variable. Any info is greatly appreciated.

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• loading HTML fragments with jQuery

  - by sam

  Hi everybody, I'm very new to jQuery, Ajax and things like these. I've found solutions on how to inject HTML fragments into my site: $(document).ready(function(){ $('a').click(openContent); //binding all anchors to this function }); function openContent(){ var path = $(this).attr('href'); $('#content').load(path); return false; //to prevent browser from loading the single HTML fragment } That works really fine! The problem is, these function won't be executed when clicking on anchors located in the new HTML fragment which were injected right before. So the fragment won't get injected into div, the browser will only load the fragment for itself. Hope there are solutions which aren't that tricky... thanks sam

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• Modify url for bookmarking using JavaScript

  - by jamesaharvey

  I'm exploring my options for modifying urls in the browser bar for bookmarking purposes. Ideally, I'd like to add querystring parameters and cannot determine if this is even possible. I don't want the page to refresh and want to add querystring values on link clicks, ajax calls, etc. If I can't add querystring parameters, then I'd like to add hash values (http:://someurl.com#hash-value). How should I go about doing this? Should I use plain JavaScript or a framework (jquery, prototype, etc.) and/or framework plugin.

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• jquery value of textarea

  - by Elliott

  Hi, I have the code below, which sends the value of the textarea and either gets a fail or Successful response, for now I just check if it says "hello". function postdata() { $.ajax({ type: "POST", dataType: "text", url: "makepost.php", data: "post_text=" + $("#post_text").val(), cache: false, success: function(reply_text) { if (reply_text.indexOf("Successful") >= 0) { alert("Post Made"); } else { alert(reply_text); } } }); } <textarea rows="3" cols="25" id="post_text" ></textarea><br /> <input type="submit" id="post_bttn" value="Post" onclick="postdata(); return false;"> I have also tested just echo'ing out the value of the textarea, and all the time it is jus blank. Although in firebug it shows that I have sent that text. Any ideas? Thanks :)

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• asp.net mvc json open dialog box problem

  - by mazhar kaunain baig

  function postForm() { $.ajax({ type: "POST", data: $("#myForm").serialize(), dataType: "json", url: '<%= Url.Action("JSONRequest","Home") %>', success: function(result) { window.alert(result.name); }, error : function() { window.alert('error'); } }); } Html.BeginForm("JSONRequest", "Home", FormMethod.Post, new { id = "myForm" }); Html.TextBox("mazhar") <input type="submit" onclick="postForm" /> Html.EndForm(); public ActionResult JSONRequest(FormCollection form) { string a = form["mazhar"]; var data = new { name = "aaaa", Success = "Record is Succesfully Saved", ErrorMessages = "abc" }; return Json(data); } Ok the problem is that the dialog box is opening after running this code which is asking to save file. Can someone tell me how to resolve this issue?

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• Trying to get a json result back from method in another namespace, having issues

  - by Blankman

  I have a seperate .js file and namespace for json requests. I have another .js file and namespace for the actual logic. I can't seem to get the result back in my logic layer. var jsonResult = Blah.Data.LoadAggregates(); alert(jsonResult); alert(jsonResult.d.length); alert(jsonResult.length); all of the above calls are returning undefined. Blah.RegisterNamespace("Blah.Data"); (function(Data) { Data.LoadAggregates = function() { $.ajax({ type: "POST", url: "asdf.asmx/GetAggregates", data: "{}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(data) { ??????? }, error: function(msg) { alert("error" + msg); } }); }; })(Blah.Data);

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• How do you make javascript code execute *in order*

  - by Ed

  Okay, so I appreciate that Javascript is not C# or PHP, but I keep coming back to an issue in Javascript - not with JS itself but my use of it. I have a function: function updateStatuses(){ showLoader() //show the 'loader.gif' in the UI updateStatus('cron1'); //performs an ajax request to get the status of something updateStatus('cron2'); updateStatus('cron3'); updateStatus('cronEmail'); updateStatus('cronHourly'); updateStatus('cronDaily'); hideLoader(); //hide the 'loader.gif' in the UI } Thing is, owing to Javascript's burning desire to jump ahead in the code, the loader never appears because the 'hideLoader' function runs straight after. How can I fix this? Or in other words, how can I make a javascript function execute in the order I write it on the page...

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• Recommendations for easy jQuery Autocomplete using AJAX that will set form value based on selected t

  - by Ben Dauphinee

  I am looking for suggestions on the easiest to set up and use AJAX Autocomplete plugin that will use JSON key/value pairs. I want a plugin that supports setting the form value to the key of the name selected. I have been working with jQuery UI Autocomplete, but it is a total pain in the rear to get this working. Does anyone know of anything that actually supports this out of the box, or have a thread or page where this is already detailed?

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• Ajax In Firefox Plugin

  - by Jishnu

  Hi, Is there any way to send Ajax request to server from Firefox plugin? If yes how? If no, how do we have client server communication in Firefox plugin? I want to get some json data from server and manipulate dom object according to the client input. I am pretty beginner in plugin programming Regards, Jishnu

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• JQuery never reaches success or fail on aspx returning json.

  - by David

  Basicaly I have my aspx page doing <% Response.Clear(); Response.Write("{\"Success\": \"true\" }"); Response.End(); %> My JQuery code is function DoSubmit(r) { if (r == null || r.length == 0 || formdata == null || formdata.length == 0) return; for (i = 0; i < formdata.length; i++) { var fd = formdata[i]; r[fd.Name] = fd.Value; } r["ModSeq"] = tblDef.ModSeq; jQuery.ajax({ url: "NashcoUpdate.aspx" , succsess: doRow , error: DoSubmitError , complete: DoSubmitComplete , dataType: "json" , cache: false , data: r , type: "post" }) } When I call the DoSubmit() function every thing works but the doRow or DoSubmitError functions never get called only the DoSubmitComplete function. When I look at the response text in teh DoSubmitComple function it is {"Success": "true" } Every JSON tester I have tried says that this is valied JSON. What am I doing wrong here?

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• CakePHP and jQuery - Unobtrusive actions

  - by fortysixandtwo

  I'm trying to make an unobtrusive action for deleting bookmarks in CakePHP. Allthough it's working just fine, I suspect there must be a better way to do this. Could someone please point me in the right direction? function delete($id = null) { $ok = $this->Bookmark->delete($id); if($this->RequestHandler->isAjax()) { $this->autoRender = false; $this->autoLayout = false; $response = array('status' => 0, 'message' => 'Could not delete bookmark'); if($ok) { $response = array('status' => 1, 'message' => 'Bookmark deleted'); } $this->header('Content-Type: application/json'); echo json_encode($response); exit(); } // Request isn't AJAX, redirect. $this->redirect(array('action' => 'index')); }

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• Use jQuery Fancybox(lightbox type dialog) with dynamically loaded links

  - by Pjack

  I'm trying to bind Fancy box links so that when the new links are created it will still work. I've seen a few other question on here but not really answered. This is what I'm trying to do. jQuery("a#[id^='domore_']").fancybox({ 'autoDimensions' : false, 'width' : 'auto', 'height' : 'auto' }); This works fine but when the page or links are reloaded by ajax it doesn't work. I tried using live() but I couldn't get it to work. How do you rebind or implement live on fancybox? Any way to do this? Thanks

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• jQuery UI Autocomplete plug-in pass in optional data for ajax call

  - by dev.e.loper

  I'm using jQuery UI Autocomplete plug-in. I'm giving it an URL to make an ajax call and retrieve data. I want to pass optional data parameters but not as part of URL. In the code they make a getJSON call and pass in 'request' parameter(which is an optional data parameter), however I don't see a way to get at this request parameter. this.source = function( request, response ) { $.getJSON( url, request, response ); };

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