Mega Code Archive
Aborting the Previous Asynchronous Postback
<![CDATA[
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void btnGetFortune_Click(object sender, EventArgs e)
{
System.Threading.Thread.Sleep(3000); // wait 3 seconds
lblFortune.Text = String.Format("At {0:T}, the oracle says: ", DateTime.Now);
Random rnd = new Random();
switch (rnd.Next(4))
{
case 0:
lblFortune.Text += "You're doomed!";
break;
case 1:
lblFortune.Text += "Good luck is around the corner.";
break;
case 2:
lblFortune.Text += "Don't leave home.";
break;
case 3:
lblFortune.Text += "Buy stock today.";
break;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>UpdatePanel Abort</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel ID="up1" runat="server">
<ContentTemplate>
<asp:Button
id="btnGetFortune"
Text="Get Fortune"
OnClick="btnGetFortune_Click"
Runat="server" />
<asp:Button
id="btnCancel"
Text="Cancel"
Enabled="false"
Runat="server" />
<br />
<asp:Label ID="lblFortune" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
<script type="text/javascript">
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_initializeRequest(prm_initializeRequest);
function prm_initializeRequest(sender, args)
{
if (args.get_postBackElement().id == 'btnCancel')
{
prm.abortPostBack();
alert("Fortune Aborted!");
}
else
{
$get('btnCancel').disabled = false;
}
}
</script>
</body>
</html>
]]>