Why Is OnBeforeUnload Firing Twice With LinkButton?

Feb 10 10 at 18:46

I have the following Jquery function to notify the user with a prompt when they have unsaved changes (similar to how SO does it) and are trying to leave the current screen.

<!-- in my aspx page -->
<script type="text/javascript" language="javascript">
window.onbeforeunload = function()
if (HasPendingUpdates())
return "Changes you have made will not be saved.";

This works as expected and shows the message box when the user tries to click a href to browse away or use the back button etc. The problem I am having is that one of my links is a asp:LinkButton because it needs to fire off some server side code before leaving the page. When the user clicks this LinkButton they get the prompt twice.


User clicks the LinkButton
Prompt appears and user clicks the cancel button.
Prompt disappears and user is still on screen. GOOD.
User clicks the LinkButton
Prompt appears and clicks the OK button.
Prompt disappears and the same prompt shows again.
User clicks OK again.
Prompt disappears and user moves to the next screen and all is good.

So why am I getting the second prompt??? How is the OnBeforeUnload firing twice?


VS 2005 Linkbutton Click Even Not Firing?

Jun 10th, 2009, 10:19 PM

I have a settings page where users should be able to change their settings like password and email address. I thought everything looked good but the click events are not fireing on any of the buttons on the page. I have checked the codefile link but that doesn't seem to be it. I even tried making a new page and adding my markup to it but I get the same result. Does anyone see why my button's will not click?


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Jan 18th, 2010, 01:09 PM

I've placed a link button control on my web form and added the click event to the code behind automatically), but I've placed a break point and it never hits it. If I do the same thing with a button it works just fine.I've searched for this problem and none of the results seem to answer why mine isn't working. Maybe I'm just missing something?

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public delegate void ClickEventHandler(object sender, CommandEventArgs e);

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Jun 23 10

I have a problem with my Linkbutton which is not firing the RowCommand of my gridview.

Just for an Idea what I am doing is a follows:

1. WebForm

WebForm hosts UserControl_A.

2. UserControl_A = UpdatePanel + Panels + Gridview1 + CollapsiblePanelExtender

Updatepanel of UserControl_A consists of multiple Panels.

Each Panel consists of a Gridview1.

Upon each Panel expand UserControl_B is loaded.

3. UserControl_B = Details View & a couple of Linkbuttons in GridView2

Upon clicking the Linkbutton, unexpectedly it makes a refresh for the entire UserControl_A.

But it does not fire the RowCommand of its parent GridView2.

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Jan 20 10

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my code :


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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.

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Inside the user, there is a LinkButton. The link button has a simple server side code for OnClick event.

Everything is working fine on the production machine, but, on the Development machine, I can see incorrect behaviour. I have started making some development changes on the Development Machine since several months back, and it will be very difficult to find out what caused the problem.

When I click the LinkButton inside the user control, the user control is removed from the parent page, and the OnClick event of the LinkButton is not firing.

I did debug, and found out that after I click on the LinkButton inside the user control, then the Page Load events for the master page and the ASPX page are working fine, and the IsPostBack is set to true, but the OnClick event of the LinkButton is not firing.

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I am using jquery onbeforeunload event in asp.net application.
If i write event as given below then its working fine and display confirm dialog box.

var vGlobal = true;
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[ Working ]
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[ Not working ]
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I'm trying to achieve an edit screen where the user is warned before navigating away. It works fine except I get the pop up for normal post backs of button clicks. I'm hoping to avoid this so I'm figuring if I could determine which button was pressed it would work. Does anybody know how to determine which button was pressed in the indows.onbeforeunload? Alternatively anyone know a better approach to what I'm trying to achieve?

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Nov 18, 2009 10:41 AM

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design pg

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Nov 26 10 at 21:53

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Content controls have to be top-level controls in a content page or a nested master page that references a master page.

Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: Content controls have to be top-level controls in a content page or a nested master page that references a master page.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[HttpException (0x80004005): Content controls have to be top-level controls in a content page or a nested master page that references a master page.]
System.Web.UI.MasterPage.CreateMaster(TemplateControl owner, HttpContext context, VirtualPath masterPageFile, IDictionary contentTemplateCollection) +8836686
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System.Web.UI.Page.ApplyMasterPage() +15
System.Web.UI.Page.PerformPreInit() +45
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +328

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