Ajax prevents users from submitting 2 of solutions over and over again

The submission of the situation of friends can refer to, I hope to help you

 

The method can be loaded on the server side:

Copy Code code as follows:


private void onloading ()


{


System.Text.StringBuilder sb = new System.Text.StringBuilder ();


sb. Append ("function pageload () {var manager = Sys.WebForms.PageRequestManager.getInstance ();");


sb. Append ("Manager.add_beginrequest" (onbeginrequest); Manager.add_endrequest (Onendrequest)} var Lcpostbackelementid; ");


sb. Append ("function OnBeginRequest" (sender, args) {Lcpostbackelementid = Args.get_postbackelement (). Id.tolowercase (); if (Lcpostbackelementid = = "Btnadwords") {$get ("btnadwords"). Disabled = true; $get ("Btnadwords"). Value= ' Submitting ... '} ");


sb. Append ("function Onendrequest" (sender, args) {if (Lcpostbackelementid = = "Btnadwords") {$get ("btnadwords"). Disabled = False $get ("Btnadwords"). value= ' OK ';} ");





Scriptmanager.registerstartupscript (Page, Page.gettype (), "Btnadwords", sb. ToString (), true);


}

can also be written directly in the page script:

Copy Code code as follows:


<script>


function pageload ()


{


var manager = Sys.WebForms.PageRequestManager.getInstance ();


manager.add_beginrequest (onbeginrequest);


manager.add_endrequest (onendrequest)


}


var Lcpostbackelementid;


function OnBeginRequest (sender, args)


{


Lcpostbackelementid = Args.get_postbackelement (). Id.tolowercase ();


if (Lcpostbackelementid = = ' Btnadwords ')


{


$get (' btnadwords '). Disabled = true;


$get (' btnadwords '). Value= ' is submitting ... ';


}


}


function Onendrequest (sender, args)


{


if (Lcpostbackelementid = = "Btnadwords")


{


$get (' btnadwords '). Disabled = false;


$get (' btnadwords '). value= ' OK ';


}


}


</script>

For more information please refer to: http://msdn.microsoft.com/zh-cn/magazine/cc163319.aspx