Why Is OnBeforeUnload Firing Twice With LinkButton?

Feb 10, 2010

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?

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Jun 10, 2009

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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Jun 23, 2010

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

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

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Jan 20, 2010

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my code :


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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.

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var sMessage = "Leaving the page will lost in unsaved data!";
[ Working ]
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Code on aspx:

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design pg

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