Jquery - Delay A AutoPostBack So JavaScript Fires First?
Mar 2, 2010
I've got an odd situation with a text box and an autocomplete setup on my page. I'm using a JQuery based autocomplete on a text box that has AutoPostBack="True". This works perfect if I use the keyboard to select an autocomplete item, which then fires Jquery to fill in the text box, and then when I tab out of the box the AutoPostBack fires. If, however, I click on an autocomplete item, my text box loses focus first and the AutoPostBack fires before the Jquery has a chance to change the text in my text box. Is there a way to delay either the PostBack or the Jquery so that they don't fight each other? I'm thinking it may have to be the PostBack that gets changed, since the JQuery would lose it's state on the PostBack
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Similar Messages:
Aug 26, 2010
Well I have a strange problem.I have a page with 2 DropDownLists on it and a custom web-user-control. The custom web user control has an UpdatePanel within it, and an Ajax Timer control within the UpdatePanel to periodically update a listing of stuff.When I "drop-down" one of the DropDownLists and hover over (not click on) an option while the Timer control within the UpdatePanel asynchronously posts back to the server, the DropDownList "autopostbacks" to the server!
I'm trying to figure out why an asynchronous postback would cause the DropDownList to act as if I selected/clicked on an option so that I can find a way around this issue.Now it's really simple to reproduce this problem. Create a Web User control called "TimerUpdatedListing"...this is the ASPX code markup for the web user control:
<%@ Control Language="vb" AutoEventWireup="false" CodeBehind="TimerUpdatedListing.ascx.vb" Inherits="MyNamespace.TimerUpdatedListing" %>
<div style="width: 150px; height: 150px; overflow: auto; border: solid 1px navy;">
<asp:UpdatePanel ID="anUpdatePanel" runat="server">
[code]...
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Dec 8, 2010
I have a required field validator to validate a dropdownlist. this dropdownlist is an autopostback one, and it's causevalidation property is set to be false.the issue is, when I select the default item, the validation message shows, but the still do the postback. And after the postback, the message disappers.here is the snippet of codes:
<asp:RequiredFieldValidator ID="ContactMethodRequired" runat="server" ControlToValidate="ContactPreferences"
Display="Dynamic" ErrorMessage="Please choose your contact method"
EnableClientScript="true" InitialValue=""></asp:RequiredFieldValidator> [code].......
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Jan 30, 2010
I have the following sample code
[Code]....
[Code]....
When I place a value in TextBox1 and then click inside TextBox3 (which is there to have a place to go to get out of TextBox1 and TextBox2) the value from TextBox1 remains and is displayed in the MessageBox.Show correctly.
When I pick a value from the drop down calendar extender in TextBox2 for a brief micro-second the value from the calendar displays in TextBox2 and then the MessageBox.Show displays and the value in TextBox2 returns back to the orginally set value. The MessageBox.Show shows the orginally set value.
For TextBox2 if I set AutoPostBack=false then the TextBox2 works correctly and keeps the date picked from the calendar extender but the ontextchanged="TextBox2_TextChanged" never fires.
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Oct 1, 2010
I want to delay blocking by 2 seconds while executing this code. How can I do that ? I tried setTimeout but it did not worked.
document.getElementById('<%=btnSave.ClientID%>').disabled=true;
document.getElementById('<%=btnSave.ClientID%>').value='Saving...';
$('#Block').block({message:'Please wait...',css: { border: '3px solid #a00' }});
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Sep 27, 2010
I have an ASP.NET page with Javascript. I have some checkboxes and I want to give the user time to check and uncheck more then one box before the postback... so when the user tick/untick a check box the postback happens after 5 seconds. How can I do this? tryed different methods found online but all incomplete or wrong.
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Sep 7, 2010
My web application is make time to open First page due to various data control on the page and values are coming to that control from database so i want to show the loading message of gif image during page loading delay. I have written this code in my master page but that image is not showing the application.
<html xmlns="http://www.w3.org/1999/xhtml" >
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Feb 10, 2010
I've got the an bit of ajax and the succeed runs twice. I've got a global var that I used to keep track.
Code:
var counter = 0
$('#txtLookupText').keyup(function(event) {
$(document).ready(function() {
});
$.ajax({
type: "POST",
url: 'ContactLookup.aspx/LookupContacts',
data: "{'inputStr': '" + $('#txtLookupText').val() + "'}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(msg) {
AjaxSucceeded(msg);
},
error: AjaxFailed
});
});
function AjaxSucceeded(result) {
if (result.hasOwnProperty("d")) { result = result.d; }
var li = ''
for (i = 0; i < result.length; i++) {
li += result[i].FirstName + ' ' + result[i].LastName + '
}
counter += 1
alert(counter)
}
function AjaxFailed(result) {
alert(result.status + ' ' + result.statusText);
}
I moved the counter to the POST and only got one alert box. In the succeed, I get 2 alert boxes in succession.
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May 19, 2010
Trying to use BlockUI and asp.net validation groups on a page but the validators are not fired.How to check which control fired the event and fire the validation group of that event inside jquery ?Here is the script file.
Sys.Application.add_init(function() {
// Allows the div.blockMsg style in CSS to
// override BlockUI's defaults.
$.blockUI.defaults.css = {}; [code].....
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Jul 21, 2010
I want to show a confirm dialog when the user selects an item in a DropDownList. If the user presses "Cancel", I want to stop the postback. Here is the function I add to the onchange event:
function imitateConfirmUnload(event) {
if (window.onbeforeunload = null)
return true;
return confirm("Are you sure you want to navigate away from this page?
You have unsaved changes
Press OK to continue or Cancel to stay on the current page.");
}
And this is the relevant bit of code in my startup script to add the handler to the event:
[code]...
The problem is that the postback occurs even if the user selects "Cancel". If I move the handler on to the click event, it works. But it feels clunky to me.
Edit
Correction: it doesn't work onclick, because the dialog prevents selection, so when the user selects OK, no change has taken place, and no postback when you want it!
Edit 2
The DropDownList is inside an UpdatePanel so that may affect behavior.
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Mar 1, 2011
Is it possible to fire a JavaScript method after a form element is considered invalid? Here is my scenario:
There are 2 tabs on the ASPX page. The user has to fill out info on both tabs. The user, while on tab 2 clicks the submit button. However, there is a required field on tab one that needs attention. Do I need to create a custom valuator (either a CustomValidator control or create a new control from the base valuator) to call a JavaScript function to display tab 1 and show where the error is?
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Mar 2, 2010
I have noticed that window.onunload event fires off AFTER page_load event which makes no sense.
This behaviour is creating an issue for me - in my unonload I clear the session, so if the Page_Load first BEFORE onunload, there are errors on the page displayed.
I would expect the javascript onunload to fire BEFORE Page_Load....is that the correct assumption?
TO CLARIFY: Let's assume I am on page test.aspx, then I click on the link that goes to the same page (say I click on a menu), what I observe is that Page_Load fires first, then onunload fires off.
Makes no sense at all.
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May 28, 2010
I have a DataList that has a column with a checkbox in it. The checkbox has its AutoPostBack property set to true. During the DataList's OnItemDataBound event, I am registering a javascript method to the control:
chk2.Attributes.Add("onclick", "CheckAdvanceChecked(this);"); The purpose of this method is to determine if any of the programmatically checkboxes in the DataList are checked, and if so, disable some of the other controls on the page. My problem is that when the HTML is generated, my 'CheckAdvanceChecked' function is being placed (and executed) prior to the javascript that ASP automatically adds to the checkbox (due to its AutoPostBack property): <input id="checkAdvanceList_ctl01_chk" type="checkbox" name="checkAdvanceList$ctl01$chk" onclick="CheckAdvanceChecked(this);
etTimeout('__doPostBack('checkAdvanceList$ctl01$chk','')', 0)" Value="760" /> I need my CheckAdvanceChecked(this); function to to be place after the 'setTimeout' function that ASP generates automatically so it will execute last. Is this possible?
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Mar 29, 2010
I am using an asp.net autopostback enabled dropdown list. Here i want to restrict the autopostback property fot the value "Select" in the ddl. I have used javascript for this purpose. but not working.My code look like this.
[Code]....
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Jun 6, 2010
![<asp:RadioButtonList ID="RdoBtnHasNotified" runat="server" RepeatDirection="Horizontal" AutoPostBack="True" OnSelectedIndexChanged="RdoBtnHasNotified_SelectedIndexChanged">
<asp:ListItem Value="1">Yes</asp:ListItem>
[code]...
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Dec 25, 2010
i am developed a grid view using tmplate fields. i have done addition and deletion of row using java script and ajax(using web method). now i want to impliment the editing of the grid row using javascript without autopost back Here is the template field i am using.....
<asp:TemplateField HeaderText="EmailId">
<ItemTemplate>
<asp:Label ID="Label4" runat="server" Text='<%# Eval("EmailId")%>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox BorderStyle="None" ID="txtEmailId" runat="server" Text='<%# Eval("EmailId") %>' Width="80px"
Visible="true"></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
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Sep 11, 2010
I've tried to wrap up my problem with a complete example below - the original problem is part of a jQuery plug-in that I'm writing to extend the behaviour of an ASP.NET ajax application I already have.
The aspx page below has one drop down list which is marked for auto post back. I've also bound a change event using jquery (which ultimately I will swap for a .live() event to maintain the binding after the update panel refresh.) The problem is, when the jQuery event is bound I see two ajax begin requests and page_loads fire but only one ddlTest_OnselectedIndexChanged event. One of the page loads is malformed too - the content-length states it's about 300 bytes long whilst the totalBytes is 0 and form data empty. This does not happen if I bind to the click event of a button.
why the erroneous page_load event is firing ?
[code]....
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Feb 14, 2011
I want to restrict the user if they select the language which is already selected by displaying alert msg using JQuery.
Is there any event which fires before the change event.
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Jul 14, 2010
i have saved a copy of jquery-1.4.2.js in my local project folder also have jquery-1.4.1-vsdoc.js
I have added comment like /// <reference path="jquery-1.4.2.js" /> in my custome javascript file
Also in another project in the same system i can uise jquery well
but in one of my project i show Microsoft javascript.... errror
what can i do? a line like $("#K").val(); gives error
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Mar 5, 2011
I have a some data which is displayed in div body now i want to import that div content in excel format so how can i do this using javascript/jquery or even c#
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Feb 17, 2011
I have this code being called
[Code]....
which returns <div>here</div><script language=javascript>alert('');</script> The content gets loaded property, but no alert. How would I get a javascript routine to work from an ajax call along with posting the HTML code?
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Apr 4, 2011
I have an ASP .NET page where I use jQuery. I used this function to search an element in the DOM
$(document).ready(function() {
currentID = $('#ctl00_ContentAreaPlaceHolder_hfCurrentID').val();
if (currentID != "") {
window.setTimeout(function() {
$("div[class^='element'][ID='" +currentID + "']").trigger("click");
[code]...
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Apr 22, 2010
There is a website that I've programmed that sometimes takes a long time to load. I will click on a browser bookmark to load the page which should take me to a login page. The code that the Page_Loads for the MasterPage and the initial Login page contain is minimal; no service, database, etc. executions. I even just commented everything out and the problem remains. Sometimes it takes 5/10/maybe more seconds for the simple Login page to load. I'm trying to figure out what the issue is, but I'm having a hard time. When I put breaks on the Page_Loads and debug, it loads immediately. Then, seemingly randomly sometime after that, it will again load slowly.
It wouldn't seem like any of my code is the issue since, when I debug, it loads quickly. I'm not calling any services or database methods so, AFAIC, that can't be the issue. I separated all of my websites in my IIS to use their own app pool the other day so if there is a memory leak in another site, it won't affect this one. The only thing I can think of now is some issue with my network which I wouldn't have the slightest clue at starting to debug. I can have IT investigate, of course, is that is a probable cause.
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Jan 7, 2010
I'm reading the stream from a FileUpload control, reading in chunks of n bytes and writing the array in a loop until I reach the stream's end.Now the reason I do this is because I need to check several things while the upload is still going on (rather than doing a Save(); which does the whole thing in one go). Here's the problem: when doing this from the local machine, I can see the file just fine as it's uploading and its size increases (had to add a Sleep(); clause in the loop to actually get to see the file being written).
However, when I upload the file from a remote machine, I don't get to see it until the the file has completed uploading. Also, I've added another call to write the progress to a text file as the progress is going on, and I get the same thing. Local: the file updates as the upload goes on, remote: the token file only appears after the upload's done (which is somewhat useless since I need it while the upload's still happening).
Is there some sort of security setting in (or ASP.net) that maybe saves files in a temporary location for remote machines as opposed to the local machine and then moves them to the specified destination? I would liken this with ASP.net displaying error messages when browsing from the local machine (even on the public hostname) as opposed to the generic compilation error page/generic exception page that is shown when browsing from a remote machine (and customErrors are not off)
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Mar 24, 2011
I'm starting to learn jquery widthout knowing javscript.someone told me that I don't need to learn javascript before learnig jquery.But I seen many people (in the internet) said that I must learn javascript well. to start learn Juqery?so do I must to learn javascript before jquery?
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