Subscribe OnResponseEnd/OnRequestStart on client-side

[Andrey]

Although there is really very good client-side support in Telerik controls, I can't find the way to subscribe AjaxManager OnResponseEnd/OnRequestStart events on client-side. The only way that I see is to do this on server-side (via codebehind or via declaration).
Could you please clarify if there is any way to subscribe to these events on client-side?

[Shinu]

Hello Andrey,

You can attach client events as explained in this documentation. Also check the online demo which implements the same.

-Shinu.

[Andrey]

Thank you for links, Shinu, but I have read these articles. They explain that you can attach client-side events to ResponseEnd/RequestStart via assigning property on server-side, but I need to do this completely in javascript. Like:
$find(ajaxManagerId).add_onResponseEnd(func)
Is there any way to do this?

[Kevin]

Hello Andrey,

You can attach the events using js like so:

$find(ajaxManagerId).OnResponseEnd = func;

You'll just need to register it every time an ajax request is performed, as it gets removed.

I hope that helps.

[Andrey]

Hello Andrey,

You could hook the OnAjaxRequest and OnResponceEnd events of RadAjaxManager just like you will do it with any JavaScript event. Namely:

function pageLoad(sender, args) {
    var ajaxManager = $find("<%=RadAjaxManager1.ClientID %>");
    ajaxManager.OnRequestStart = "requestStart(this, event)";
}
function requestStart(sender, args) {
    alert("Request had started");
}

However, with this approach you are loosing the specific information from the OnRequestStart event argument and you are receiving the DOM event argument.

Another approach is to hook the OnRequestStart event from the server and in its body to check if some condition is met and then to cancel the event. Like this:

function requestStart(sender, args) {
if(some condition is met){
args.set_cancel(true);
}
}

Greetings,
Andrey
the Telerik team