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Raising Javascript funtion on clicking of X button of Web form

Posted on 2008-11-02
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Last Modified: 2013-12-17
I am working with web forms

ASP.Net 2.0+C#.Net

I am opening a modal dialog window from a parent page.Now when the user closes the modal dialog window by clicking on X button I want to raise a javascript function.How do I do that.I dont want to use onunload event of form...any other way?
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Question by:vali66
6 Comments
 
LVL 16

Expert Comment

by:Gyanendra Singh
ID: 22864985
use this
<BODY onbeforeunload="HandleOnClose()">

Then, add the following JavaScript code into the <HEAD> section of your ASPX page:

<script language="javascript">
<!--

function HandleOnClose() {
   if (event.clientY < 0) {
      event.returnValue = 'Are you sure you want to leave the page?';
   }
}

//-->
</script>

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LVL 26

Expert Comment

by:Anurag Thakur
ID: 22865007
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Author Comment

by:vali66
ID: 22865013
The modal dialog window I am using is basically used for progress bar functionality.So this form will get loaded and unloaded at each instance and obviosly I cant use onbeforeunload and onunload.

So Is there any other way of raising javascript function when the user clicks on X button??
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LVL 16

Expert Comment

by:Gyanendra Singh
ID: 22865452
as per my knowlede No other way  is available
0
 
LVL 7

Expert Comment

by:moseack
ID: 22865686
Hello vali66,

You could use one of the before mentioned events like a dead-men-switch.
Attach your event handler code to handle "unexpected" closure of the window. When the progress bar completes normally, flag this, so the close handler will not run.

<BODY onunload="Body_OnClose()">
 
<script language="javascript">
<!--
var noramlClose = false;
function Body_OnClose()
{
  if (normalClose)
    return;
 
  alert("Unexpected closing");
}
 
//-->
</script>

Open in new window

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Accepted Solution

by:
vali66 earned 0 total points
ID: 22866071
Hi moseack,
                   Thanks for the suggestion.But how do differentiate the normal closing (when the status is 100%) and Unexpected closing(not equal to 100%).

As in the both cases the form gets unloaded.For each percentage change (the form gets loaded and then unloaded) as I am running this under a thread.

Specifically I want to capture the event when the user explicitly clicked on X button of browser.

Any other alternative..


Thanks,
Shaikshavali.
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