Web Forms :: TreeViewcontrol And OnBeforeUnload?
Sep 28, 2010
In one of my applications, i created the left navigation menu using treeviewcontrol. Each and every node in the treeview is calling a URL in the application.Content pages are dynamically created ASP.NET controls.There is no submit or save buttons in these pages. When the user finished entering the data and go to another link in the tree structure, the data need to be saved in the database and go to the next link.I tried this using OnBeforeUnload and Document.form1.submit, the aspnet form is not submitting, so there is no postback. I also tried __dopostback method call from the javascript. Still not able to get it working.
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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.";
}
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</script>
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Jan 12, 2011
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;
var sMessage = "Leaving the page will lost in unsaved data!";
[ Working ]
> window.onbeforeunload = function() {
> if (vGlobal == false) return
> sMessage; }
but its not working if i use bind method like as given below
[ Not working ]
$(window).bind("beforeunload", function(e) {
if (vGlobal == false)
return sMessage;
});
Is there any difference between these two methods.
Code on aspx:
<asp:TextBox ID="txtName" runat="server"></asp:TextBox>
CLICK ON THIS LINK TO SEE RUNNING EXAMPLE
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Aug 26, 2010
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Mar 7, 2011
I have set up in javascript:
var onBeforeUnloadFired = false;
window.onbeforeunload = function (sender, args)
{
if(window.event){
if(!onBeforeUnloadFired) {
onBeforeUnloadFired = true;
window.event.returnValue = 'You will lose any unsaved changes!'; //IE
}
}
else {
return 'You will lose any unsaved changes!'; //FX
}
windows.setTimeout("ResetOnBeforeUnloadFired()", 1000);
}
function ResetOnBeforeUnloadFired() {
//Need this variable to prevent IE firing twice.
onBeforeUnloadFired = false;
}
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[Code]....
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