display loading symbol in vb.net

Question

Hai ,                         I have created one  vb.net  application.In that app i have pulled the data from  asp.net  through  webservice.                         so  I call the web service method when the user click the save button.But  it take long time to retrieve the data.                         so now I want to display some loading symbol or image until the data is retrieved.                         How I can do that?

Lalit M · Answer

Add the following JavaScript Code to your aspx page
"text/javascript" language= "javascript" >
function pageLoad(sender, args) {
var sm = Sys.WebForms.PageRequestManager.getInstance();
if (!sm.get_isInAsyncPostBack()) {
sm.add_beginRequest(onBeginRequest);
sm.add_endRequest(onRequestDone);
}
}
function onBeginRequest(sender, args) {
var send = args.get_postBackElement().value;
if (displayWait(send) == "yes" ) {
$find( 'PleaseWaitPopup' ).show();
}
}
function onRequestDone() {
$find( 'PleaseWaitPopup' ).hide();
}
function displayWait(send) {
switch (send) {
case "Save" :
return ( "yes" );
break ;
case "Save and Close" :
return ( "yes" );
break ;
default :
return ( "no" );
break ;
}
}
reference link
more info
-----------
http://aspalliance.com/38_Javascript_Please_Wait_Message_Boxes.all
http://blogs.crsw.com/mark/articles/642.aspx