AJAX :: Enabled Page_load Event Firing Twice?

Dec 4, 2009

I have a page on which there is a textbox that is in update panel and has text changed event and autopostback=true. On the same page there is a 'Retrieve' button outside the updatepanel. Now what is happening is if user inputs data in the textbox and clicks retreive button page_load event is firing twice which is not what should be happening, one time its the partial postback due to the text changed event and second time is the page post back. I would like to restrict the second postback.



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Forms Data Controls :: Set A LinkButton's Enabled And Visible Properties In The Page_Load Event

Sep 24, 2009

i am currently trying to set a LinkButton's Enabled and Visible properties in the Page_Load event. The LinkButton is a delete control for a gridview. My reason for needing to do this is to only allow deleting in the gridview for certain login roles. The following is what I currently have and throws a 'Object reference not set to an instance of an object.' exception.

[Code]....

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[C#] Nested Master Page Not Firing Page_Load Event?

Jun 25, 2009

I have used the information from MSDN to create a nested master page. I want a main master page for my site, and a nested master page for my Administration panel. In the CS code for the nested master, I am checking the logged in state against my session in the Page_Load event, but that event never fires. How can I make that event fire on the nested master page? here is how my solution and pages are setup:

/MainMaster.Master (this Page_Load event fires)
/Default.aspx (MainMaster.master child) (this page load event fires)
./Admin/Admin.Master (MainMaster.Master child) (this page load event doesn't fire)
./Admin/Default.aspx (Admin.Master child) (this page load event fires)

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Web Forms :: CheckedChanged Event Not Firing When Checked Property Set On Page_Load

Jul 21, 2010

I have a web form with two RadioButtons, both use the same GroupName, both have AutoPostback enabled and both have an event handler for CheckChanged. I use tem to show/hide a Panel further down the form which is contained in an UpdatePanel with Conditional Update set and with both CheckedChanged events in the Triggers collection:

[Code]....

Now, the problem arises when I set the Checked property of either RadioButton in Page_Load, which results in the even not firing for the button which was marked as Checked (the event for the radio button whose property was not assigned does get fired). In fact, upon inspecting the source there was no 'onclick' attribute declared for the input element that was marked as checked in the Page_Load, whereas the other RadioButton did have the 'onclick' attribute properly set.

The layout of the form doesn't allow me to place the radio buttons within the UpdatePanel, so that is out of the question. Is the behavior explained above normal? am I missing anything? Both events fire once the assignment to the Checked property is removed from Page_Load.

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AJAX :: How To Partial Post Back Fires Page_Load Event

Feb 4, 2010

Basic concept of AJAX is to cause Partial post back of the Page. If we use AJAX, Page Load occurs, than what is the difference between normal Pages' Page_Load event (without ajax) and Page load event of a Page with ajax.

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Forms Data Controls :: ListView Ajax - Use A LinkButton Then The Page_Load Event Is Fired?

Feb 3, 2011

I have discovered something strange when using a ListView. I have a listview contained inside an uodate panel and everything works OK until I edit the editItemTemplate to use a LinkButton instead of a Button.When i use a LinkButton then the Page_Load event is fired.

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Page_load Is Not Firing In IFrame?

Mar 16, 2010

In my asp.net web application,I use IFrames to show another page inside one page.But the problem is that the page load event of the embedded page in the IFrame is not firing when the Iframe is shown by clicking on a button in the parent page.I use the IFrame's visibility is true/false to show or hide the Iframe.I am confused what is happening there.

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C# - Page_Load Not Firing In UserControl?

Feb 22, 2011

I have created a class in c# inside a class library and i have added this control to the default.aspx, but my code doesnt fire the page_load event. Here is the code:

The page loads but doesn't show the label on the page. I have added the control to the page correctly without any errors. I have event added the register tag in there.

html tag: <RandoIntegerControls:RandomIntegerControl ID="RandomIntegerControl1" runat="server"></RandoIntegerControls:RandomIntegerControl>
using System;
using System.Collections.Generic;

[Code]....

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Page_load Firing To Frequnently?

Feb 3, 2011

I have a heavy aspx page with lots of controls that are loaded from sql server. I use the cache were I can.On my aspx page I have an asp:Button that allows members to rebuild the page with the new content selected in each control.The page build or page_load takes about 15 sec (say). If users select the asp:button before the 15 sec page_load is completed. Some times I get performance issues with my controls. I don't get errors as I am using cache a lot etc.

QUESTION1: How can I stop a page_load event firing before the previous page_load process is completed, how do I stop impatient users getting carried away with too frequent page loads firing from the asp:button?Can I do some codebehind smarts that can nullify asp:button event while a previous page_load is process is still a work in progress.

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AJAX :: Event Not Firing In Firefox?

Jun 4, 2010

Unusual one this - IE7 and IE8 both behaving, but Firefox isn't. So, I suspect that I have done something wrong which I am "getting away with" in IE.....I have a DynamicPopulateExtender (DPE) and two ModalPopupExtenders (MPE). A Javascript function shows the first MPE (a "please wait" message) and then retrieves the DPE. When the DPE finishes retrieving, its populated event fires - that hides the first MPE and shows the second one which holds the results retrieved by the DPE.I know that I could have used built in functionality within the DPE to display the "please wait" message. However that would mean displaying the MPE before populating the DPE. I can't do that because I want to size the MPE depending on what comes back from the DPE.So, this is my Javascript:

[Code]....

As I said, it works fine in IE7 and IE8. In Firefox (and Opera and Safari), the "please wait" appears and then nothing else happens.

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AJAX :: Image_click Event Not Firing?

Nov 6, 2009

There are 3 update panels in my web page.

A gridview control is in the First updatepanel. Another user control is in the Second updatepanel.

Third update panel contains some textBoxes,a calendarImageControl(this is a userControl),Submit btn.

Now, when I click on Edit mode of gridview, those rspt. details are filled in the textBoxes of the 3rd updatePanle BUT when I click on the calendar image, the click event is not firing. the Submit button click event is getting fired(which is in the 3rd updatePanel).

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Webforms - Page_Load Is Firing Twice In Page..

Jan 24, 2011

Asp.net page_load function is loading twice.. hence it affects my page performance.

Does anyone know the reason it is loading twice.

No, iam not calling the page load function anywhere...

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AJAX :: Event Not Firing On Tab Container Control

Mar 5, 2011

i'm using ajax tab container control and i have 4 tabs on it. and each tabs contains a datalist. and whenever someone clicks on the datalist he has to redirected on abc.aspx page.so for that i 'm using itemcommand event but facing problem whenever i click on datalist the event is not fired.

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AJAX :: Dropdown SelectedIndexChanged Event Is Not Firing

Sep 13, 2010

I have a usercontrol and in that i have a dropdown. i need async postback for dropdown selectedindexchanged event. i set the AutoPostBack=true for dropdown. Eventhough the event is not getting fired.

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AJAX :: ModularPopUpExtender- Button Event Not Firing?

Jun 12, 2010

<asp:Button ID="btnUpdate" runat="server" Text="Update" CausesValidation="false"

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AJAX :: TabPanel With Placeholder Event Not Firing?

Jun 14, 2010

I have a tabcontainer with a number of tabPanels. Each tabPanel has a placeholder tag which is set dynamically with relevant user control classes(ascx). When a button is clicked from a ascx within a placeholder, the onclick event does not get executed. How can I get this to work??

<cc1:TabContainer runat="server" ID="MainContainer" CssClass="MainContainer"
Width="100%" ScrollBars="Auto" AutoPostBack="True"
onactivetabchanged="MainContainer_ActiveTabChanged">
<cc1:TabPanel runat="server" HeaderText="Home" ID="TabPanel1" CssClass="AcademyTab" Width="100%">
<ContentTemplate>
<asp:PlaceHolder ID="HomePlaceHolder" runat="server" ></asp:PlaceHolder>
</ContentTemplate>
</cc1:TabPanel>
<cc1:TabPanel runat="server" HeaderText="Students" ID="StudentPanel" CssClass="AcademyTab" Width="100%">
<ContentTemplate>
<asp:PlaceHolder ID="StudentPlaceHolder" runat="server" ></asp:PlaceHolder>
<asp:Button runat="server" ID="BtnSearch" Text="search" />
</ContentTemplate>
</cc1:TabPanel>
</cc1:TabContainer>

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Web Forms :: Page_load Not Firing - Finding Solution

Dec 6, 2009

I have to convert a c# web app to vb..... I am having trouble with the page load event firing. Here is the code.

[code]....

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Page_Load Not Firing On Second Call To Response.redirect

Mar 19, 2009

I have the situation where when I call Response.Redirect("MyPage.aspx") the Page_Load function is only fired the first time I call Response.Redirect to "MyPage.aspx".

Why is this happening?

How can I force a page to completely load again when calling Response.Redirect("MyPage.aspx") when I'm on another web page?

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C# - Why Is Page_Load Not Firing After Coming Back From Another Page

Feb 17, 2010

Let's say I have two pages on the same ASP.NET C# WebSite:

Page1.aspx does things in the Page_Load event
I navigate to Page2.aspx using the menu
Page2.aspx does some things then Response.Redirect back to Page1.aspx
Page1.aspx cannot do things in Page_Load event this time because it never fires.

I tried to turn off cache declaratively, tried using true for endResponse in my redirect... nothing seems to make a difference.

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Web Forms :: Page_Load Not Firing After Response.Redirect()?

Sep 28, 2007

I am developing a data heavy application, in which there are a number of web pages which display data read from an SQL database. The data is displayed using a combination of ReportViewer, DataGrid and FormView controls. It is a fairly interactive application, and I am making use of ASP.NET AJAX to help things along. At any point in time, a page is displaying data for one entity (for the sake of example, lets say that the entity is an employee, and the page displays employee HR details). The user can navigate between employees using a number of different controls, including a dropdown list, and a search box. I also want to enable the user to search for an employee by supplying a query string in the URL. To minimise confusion, and ensure consistency, I do not want the URL to display query strings, as it is possible that the user may navigate to another employee, using page controls / AJAX, in which case, the URL would get out of sync with the page if the query string stayed visible.

In the final solution, I am using a combination of query string, Session variables, and Response.Redirect during Page_Load. Essentially, if a user supplies a query string, the Page_Load method detects it, sets a Session variable, and redirects to the same page, but without the query string. Following redirection, the Page_Load method detects that there is no longer a query string, and instead looks at the Session variable. If it is present, it initiates the search and populates the web page as appropriate.

The behaviour is inconsistent. Usually, if the query string is supplied via a hyperlink on a web page, it works fine. However, if the user types the query string into the address bar, it doesn't work. Looking further into it, I have found that when it doesn't work, it is because Page_Load does not get fired following the Response.Redirect.

Here is a heavily simplified example, which reproduces the problem for me:

Redirect.aspx:

<%@
Page Language="C#"
AutoEventWireup="true"
CodeFile="Redirect.aspx.cs"
Inherits="Redirect"
EnableEventValidation="false"

[Code]....

When either of the hyperlinks on the page is clicked, the label will be correctly set to the value of the query string. However, if the query string is typed into the address bar it is not.

More frustratingly, I find that this behaviour only occurs in either IE6 or IE7. Everything works perfectly in Firefox. Also, if I use cookieless session state, (cookieless="false" in web.config, mode="stateServer"), the code works fine in IE - but this is also not what I want, since the URL now has session information encoded in it, which is confusing to the user.

So it appears to me that the whole problem boils down to IE's handling of cookies - I've no idea what to do about this. As far as I can tell, all the IE browsers I have tried this on are at "factory standard" settings - which they have to be for my broad user group.

A few other comments relating to ideas I've seen elsewhere: I'm not using a web garden (max number of worker processes = 1). There are no underscore characters in the site name / URL.

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Web Forms :: Firing A Button Click After Page_Load?

Mar 24, 2011

I am designing a page wherein I want to display just parts of a page on page_load (i.e. menu bar). Then a few seconds later, I would like to display the rest of the controls (i.e. charts). Is this possible? What I currently have is a page that displays the page skeleton and then on button_click(), the rest of the page is rendered. I want to fire a button_click() event on code-behind without actually requiring the user to click on the button but can't seem to find good tutorials/articles regarding this approach.

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AJAX :: Accordion With LinkButton OnClick Event Not Firing?

Apr 6, 2010

I have two problems with a databound AJAX Accordion. The Accordion looks like this:

[Code]....

The code behind has this subroutine:

[Code]....

[Code]....

The first problem I'm having is that this subroutine is not fired (I have a breakpoint in it) when the LinkButton inside the accordion is clicked. The Page_Load event fires and there is no error message, javascript errors, etc, but nothing else happens.

The second problem is that I'm not sure how to go backwards with the databind. I want to be able to make use of the UpdateMethod in the ObjectDataSource because I also have textboxes inside the accordion. I will have a Save subroutine that can be called but I'm not sure what code to put inside it.

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AJAX :: Button Click Event Handler Firing Twice?

Dec 20, 2006

I noticed today that button click event handlers are firing twice for me in some cases when the button is inside an UpdatePanel -- but only in Firefox. I'm wondering if this might have to do with the Firefox 2.0.0.1 update that came out today because I never noticed this problem until today.

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AJAX :: UpdatePanel Not Firing Button Click Event?

May 10, 2010

I have a master page containing a ScriptManager control, and a Content Page containing a ScriptManagerProxy Control. Further on the content page I have an UpdatePanel control containing a GridView control and a server side button control. I have registered the button control as a trigger with the UpdatePanel control asynchronously and have set the UpdateMode of the UpdatePanel to "Conditional". I also have a "JumpLoader" control which is outside the UpdatePanel control. I have the following event for Jumploader wired up through Javascript. I am pasting the relevant sections of the code below:

[Code].....

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AJAX :: All Controls Firing An Event On First Page Postback

Feb 8, 2010

I have a web application that shows a page containing between 6 and 20 UpdatePanels, contained with Custom Web (.ascx) Controls.

You can see an example of such a page here: [URL]

The problem I'm getting is that when the user FIRST clicks any of the radio-buttons on any of the controls in the page, ALL the radio buttons that have an active selection ALSO fire an rb_CheckChanged event (see application log below). On subsequent radio-button clicks, only that RB fires the event (as expected).

This behaviour is having a dramatic impact on performance. The page loads quickly, and a "normal" RB click provides an AJAX update correctly within 1 second. The problematic first RB click, however, takes up to SIX seconds to process, which is unacceptable from a user experience standpoint.

Developed in VS.NET 2008, ASP.NET 3.5. Also I converted the "Web Site" solution to a "Web Application" (pre-compiled) and got the same performance (still too slow). Release builds run only marginally faster than debug builds.

Why would a single RB selection change cause all RB's that have a "selection" set on them to also fire? (The "selection" is determined through database settings every time the control is populated, which is called from within the parent page control's Page_Load function. This selection is determined also at first page load, since all the controls get populated then, so why would the clicking of an RB cause them all to fire an event, and only once? That's what I don't get...)

[Code]....

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AJAX :: Event Handler Not Firing Using Master Page

Jul 30, 2010

I have the following Master Page

[Code]....

Which is used in the following Page

[Code]....

With the following code behind

[Code]....

The trouble is while the event handler for the btnSearch fires, the same can not be said for the btnSave handler.

Anyone see what obvious thing I have missed.

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AJAX :: Accordian Control Is Not Firing The ItemDataBound Event?

Apr 21, 2010

I'm trying to get this accordian to get my data to display with a gridview in it, it renders fine, my datatable is being filled and it seem to bind but then there it no data and it skips my itemdatabound event in my code behind... Nothing loads!

if there is a bug with the databound event in vb.net or for this ajax control?

[Code]....

[Code]....

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With IIS7 And Ajax Button Event Not Firing Anymore?

Mar 26, 2009

I have a form with some minimul ajax in it. ScritpManager, UpdatePanel and FilterTextBoxExtender. When I comment all my ajax code out the button click event fires, data is submitted to the database, basically it works. When I want to test it with the ajax code the button click event does not fire anymore. This all worked in IIS6 but no that we are migrating the app to IIS7 it isn't working anymore. Here is the code for the button:

<asp:Button
ID="ButtonSignUp"
runat="server"
onclick="ButtonSignUp_Click"
onclientclick="this.disabled = Page_ClientValidate();if(this.disabled){this.value = 'Your request is being processed....

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AJAX :: Button Click Event Is Not Firing If Use Updatepanel?

Feb 16, 2011

I am opening a popup from aspx.cs page when a button ckicks, but at that time the source page is getting refresh.

To avoid that i want to use updatepanel, but if I use that button click event is not firing.

the code of .aspx page is

<asp:UpdatePanel ID="pnlButtons" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnPreview" />
</Triggers>

[Code]....

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AJAX :: ModalPopupExtender Preventing Codebehind Event From Firing?

May 21, 2010

Here is what I'm trying to do: Click a button on my page, which in turn makes (2) things happen:Display a ModalPopup to prevent the user from pressing any buttons or changing valuesCall my code behind method, hiding the ModalPopup when finished Here is the ASP markup:

[Code]....

popup is ALWAYS equal to null.

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