Detect ASP.Net Asynchronous PostBack using PageRequestManager Events in JavaScript
How to Detect ASP.Net Asynchronous PostBack and its settings like control and UpdatePanel that caused PostBack and the using PageRequestManager Events in JavaScript and here is an example of what I am doing :
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManag开发者_运维百科er1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="up1" runat="server">
<ContentTemplate>
<asp:Button ID="Button1" runat="server" Text="Button" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID = "Button1" EventName = "Click" />
</Triggers>
</asp:UpdatePanel>
</form>
<script type="text/javascript">
//////////////
//some javascript code
/////////////
</script>
</body>
</html>
What I want is to use JavaScript to detect this post back.
var prm = Sys.WebForms.PageRequestManager.getInstance();
if (prm != null) {
prm.add_beginRequest(function (sender, e) {
//Event raised when the Async Postback is started.
//Detect whether the request is Async
var isAsync = sender._postBackSettings.async;
//Detect Id of the control that caused the postback.
var controlId = sender._postBackSettings.sourceElement.id;
//Id of the updatepanel that caused the postback
var updatePanelId = sender._postBackSettings.panelID.split('|')[0];
});
}
prm.add_endRequest(function (sender, e) {
if (sender._postBackSettings.panelsToUpdate != null) {
//Event Raised when the Async Postback is completed.
}
});
put this and tel me the result :) you know that the same article is posted in this link with the same code : http://www.aspsnippets.com/
if you do not understand ask for explaining :)
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