Canceling the Current Asynchronous Postback : Asynchronous Event « Ajax « ASP.NET Tutorial
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- Asynchronous Event
<%@ 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 btnSubmit_Click(object sender, EventArgs e)
{
System.Threading.Thread.Sleep(3000); // sleep 3 seconds
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>UpdatePanel Cancel</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel ID="up1" UpdateMode="Conditional" runat="server">
<ContentTemplate>
<%= DateTime.Now.ToString("T") %>
<asp:Button
id="btnSubmit1"
Text="Submit 1"
OnClick="btnSubmit_Click"
Runat="server"/>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="up2" UpdateMode="Conditional" runat="server">
<ContentTemplate>
<%= DateTime.Now.ToString("T") %>
<asp:Button
id="btnSubmit2"
Text="Submit 2"
OnClick="btnSubmit_Click"
Runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
</form>
<script type="text/javascript">
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_initializeRequest( prm_initializeRequest );
function prm_initializeRequest(sender, args)
{
if (prm.get_isInAsyncPostBack())
{
alert('Still Processing First Request');
args.set_cancel(true);
}
}
</script>
</body>
</html>