JQuery :: Get Those Elements That Are Created Dynamically Through JavaScript ?
Mar 10, 2011
in an aspx pege, on Page PostBack we generally get thsoe control that were created either in aspx or code behind (dynamic controls ). But in jQuery its common practice to craete new set of controls on the fly. Supose i have created 10 spans with some id and text . So, can we get these spans on server side on Page PostBack ?
Assume you have a page in ASP.NET where it makes sense to use JavaScript/jQuery to modify the DOM with values that will eventually be read by the server on submit. For example, you have a form that allows end users to add/remove objects (like dependents on a health insurance form or assets on a loan application). What are some ways to ensure that these items are detected and retrieved by the server once the information is submitted?
I've tried a few things that work, but none of them seem perfect so I wanted to see what the community had to offer. Also, I'm not looking for suggestions that avoid dynamic DOM elements (like use a Wizard, etc.). I'm specifically trying to improve my technique with dynamically created DOM elements.
I've a JavaScript function in my page through which i make some elements in the page as 'JQuery UI droppable'.
function setDroppableTargets() { $(.cssDockZone).droppable(); }
But the elements with the class cssDockZone is created dynamically upon user interaction. So in the code behind i create the control first and finally at the end i register a scriptblock which calls setDroppableTargets().
But the javascript function is invoked before the controls are created eventhough i register the script at the end (after creating the controls) and i cross checked it by getting the elements with class name '.cssDockZone' and i getting it as 0.
I have a page where i am creating a number of <span> elements using clientside code.
I am creating the elements using jquery like this
[Code]....
But this returns a null object everytime. I have tried this code on a span that is on the page at the beginning and it works so i guess its something to do with how im creating the control dynamically.
Here is my problem. I have on multiple occasions downloaded jQuery UI and tried to use it. What happens, though, is that in the examples provided in the download the UI elements look great, but in my pages when I try to use them all the formatting and style stuff is messed up. Here is an example of a date picker:
For my page (an '.aspx' page, if that makes any difference) I have all the images in the image folder one level below the css file, just as it is in the example folder, and the script files are all together in another folder. Is there something I need that I don't have. I shouldn't need the "demo.css" file, should I? Is there a special naming convention for items in the form of the site? Is there some special way that I need to have the folders/css files/source scripts set up, like a certain folder configuration, to make it work? Kind of lost on this one. Probably a really simple fix, but I'm pretty new to using this.
i am creating Textboxes at Runtime with something like this
Code: Dim cnt As New TextBox cnt.ID = "cont_" & x If multiline Then cnt.TextMode = TextBoxMode.MultiLine End If
These are dynamically created fields. so what i want to do is to use this following JQuery on this textbox
Code: $(document).ready(function() { $("#contentbox").keyup(function() { var box=$(this).val(); var main = box.length *100; var value= (main / 145); var count= 145 - box.length; if(box.length <= 145) { $('#count').html(count); $('#bar').animate({"width": value+'%',}, 1); } return false; }); });
and what this function does it count the number of Characters that have been typed in a Textbox. so i am displaying the remaining characters. So that is working fine on my example because the Element is known at Early Binding. Now my question is what if the textbox is created dynamically ?
Code:
contentbox
this is the name of the Textbox in my example. how do we use a J Query in Dynamically created Textbox.
I have this LinkButton in the ItemTemplate section... I want to add a jQuery Popup when the user will click on it. The message that will be displayed depends of the value in the label. Is there a way I can do that?
I am trying to validate dynamically created text inputs. I have been following tutorials about how to do jquery validation using the validation library, but I cannot seem to get this to work.
I've created a bunch of asp:hiddenfields dynamically at runtime in an asp.net page.
My question is this:
How do I find those hidden fields?
I have an event attached to a control that fires a javascript function, and that's where I am attempting to use JQuery to find the hidden field associated with that control.
I created dynamically a table with 3 rows not by using table tag. I need to find these rows in scripting, in button click, if any of these rows is empty then need to generate an alert message like enter current row.
On runtime I am creating table structure using javascript and appending it to the div which is placed in an update panel. Problem here is, when I use asp.net button control, onClick of the button it posts the page to server and whatever javascript tables I have created it goes off. When I use html input button (input type="button") I don't face this problem and tables also stay there. But I have to use asp.net button to take necessary actions on the server side. Is there any way that I can restore the structure or use asp.net button control alongwith dynamic javascript.
I am dynamically creating controls from javascript. Now i want to access this is server side.
I assigned all the control values from dynamically created controls to hidden field and accessed that in server side. For this i need to create many hidden fields as much as dynamically added controls.
Once again i am faced with an issue. I must allow a user to add as many pieces of data as they wish. I have therefore employed some javascript from an tutorial
[URL]
I would now like to return the data from the dynamic fields through the c#(.cs page)
I've tried creating checkboxes, literalcontrols and textboxes. I need to generate checkboxes dynamically, depending on how many types of <whatever> the user has put in. I know how to do this (I think), but the problem is the controls don't work as they should.
If I create server controls, then for some reason I can't change the value with javascript. If I create client controls, then something appears to happen with the id so the server can't fetch the value (it doesn't recognize the id, allthough it's there in the html)
I can't use a regular checkbox with autopostback because there is to much happening at page load. On other pages on the site, this works, but on those pages the controls are not created dynamically.
I have a small form with some static elements that I am able to access with javascript the bring up a popup. 4 textboxes are generated and attached to a updatepanel. I've been trying various methods of validating the contols without generating postback.
I found anytime i registered a javascript to the scriptmanager the page must refresh.
Ive came into a problem when using partial page update. The javascript doesn't fellow. What i want to do is when i call a partial page update some of the update have controls that require a javascript code to be executed. When the partial update is done that javascript isnt here and cannot be found. So what is the best way to make a javascript file to fellow a partial page update ?
I could also write every validation for each object separately, I have only a few elements who uses a required validation but it would be nice that I could do this in one shot instead of repeating the $("input").rules("add .....
I have aspx page and in that page i registerd ascx page. i want to access the aspx page <div id = "idofdiv"> from ascx page jquery function. i have jquery function in ascx page. i want to access idofdiv in that function.
I need to insert some JavaScript code inside a UserControl that I load from an Ajax call via jQuery Ui Tabs. Let me explain... This is my View (with jQuery loaded)
<script type="text/javascript"> $(document).ready(function () { $("#tabs").tabs({ cache: false, }); getContentTab (1); }); function getContentTab(index) { var url='<%= Url.Content("~/Home/getUserControl") %>/' + index; var targetDiv = "#tabs-" + index; $.get(url,null, function(result) { $(targetDiv).html(result); }); } </script> <div id="tabs"> <ul> <li><a href="#tabs-1" onclick="getContentTab(1);">Nunc tincidunt</a></li> <li><a href="#tabs-2" onclick="getContentTab(2);">Proin dolor</a></li> <li><a href="#tabs-3" onclick="getContentTab(3);">Aenean lacinia</a></li> </ul> <div id="tabs-1"> </div> <div id="tabs-2"> </div> <div id="tabs-3"> </div> </div> With these lines of code I call the Ajax function to load the content into a DIV. This is the Action from the controller: public ActionResult getUserControl(int num) { return PartialView("TestUC", num); } And this is the UserControl... <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %> Number... <span id="testSpan"><%=Model.ToString() %></span>!! <input type="button" value="Click me!!" onclick="message();" /> <script type="text/javascript"> function message(item) { alert($("#testSpan").html()); } </script>
The problem is that the message() function returns always 1 (instead of returning the correct number). My question is... How should I add the script to my UserControl in order to have my code running correctly?
i have found out a way to find controls on content pages by using
var txt = $('input[id$=TextBox1]'). But how to access html elements like "<p>" tag and others in jquery when the html elements are in content page only.
I have a grid with 3 templetefield columns. Above that i have a checkbox list collection. i want to add no of rows equal to no of checkbox checked from list.
If I check 3 checkbox then 3 rows should be added to grid dynamically without postback.. I am trying to do it using javascript.
I'm creating an quiz application which queries the database and extracts the questions and choices. I use dynamically created controls such as a checkbox list and fill the values dynamically. How do I do this? Right now I have these functions:
array_random_init(); this creates a 10 element integer array from 1-20 - extract_question(i): this extracts a question indexed at i in DB, I created the controls and set the appropriate text in this function. - validate_question(i); this is called by button_click and validates the question i according to DB.
I understand I have to recreate the controls in Page_init on postback, but what should it look like? Do I need to add "if IsPostBack" in page_init, or do I create the controls in page_init() and reset their properties in page_load when I use extract_question(i)? Also, I cannot seem to clear the selected boxes on postback, I added page directive "enableviewstate=false" but it doesn't work.
I have a website that sales associates access to view account information with clients. S.A's can only view information for accounts that they are tied to. Some clients have more than one account, S.A's can be tied to more than one account, but not all accounts of one client need to be tied to one S.A.
On the account info pages, I have account numbers (dynamically displayed labels) displayed of other accounts that the account client is associated with, which the S.A's can see. I'm modding this so that if the S.A has viewing permissions of any of the other accounts on that list of accounts, that instead of a label being displayed, a button directing them to that account page will display instead. In order for this to work, I have to attach a security function to the button, otherwise the page will blow out on the S.A's.
So I'm running a piece that is displaying a button instead of a label, which is working fine. My problem is when I try to attach the security event to the dynamically displayed buttons. It seems that the page just posts back and doesn't execute my code at all.
On my Page_Load, I'm running this after the buttons and labels are displayed:
For x = 0 to tblAccountList.Rows.Count - 1 'use a try to target the button, use catch to handle if it's instead a label, only one cell per row. Try Dim accountLink as Button = tblAccountList.Rows(x).Controls(0) Addhandler accountLink.Click, AddressOf Me.PermissionViewCheck Catch ex as InvalidCastException Continue For End Try Next
I don't have any code checking for postbacks or anything like that, but the "PermissionViewCheck" event never fires and just reposts the page.