How to handle errors during ajax requests

[saravanan k]

Hi,

I am having an asp ajax update panel and rad loading panel. I am using the below code to show the loading panel during ajax requests. I have a timer which keeps polling a DB for a specific interval.

Situation:

If the page is inactive for a long time, the session expires, but the timer is still polling the DB. Due to the session expiry or due to some error from the server, a script error is thrown. How do i handle this in the below code?

 

<script>
        var loadingPanel = "";
        var pageRequestManager = Sys.WebForms.PageRequestManager.getInstance();
        var postBackElement = "";
        pageRequestManager.add_initializeRequest(initializeRequest);
        pageRequestManager.add_endRequest(endRequest);


        function initializeRequest(sender, eventArgs) {

            loadingPanel = $find('<% = RadAjaxLoadingPanel1.ClientID %>');
            postBackElement = eventArgs.get_postBackElement().id;
            loadingPanel.show(postBackElement);
            }


        }

        function endRequest(sender, eventArgs) {

            loadingPanel = $find('<% = RadAjaxLoadingPanel1.ClientID %>');
            loadingPanel.hide(postBackElement);


        }
</script>

[Maria Ilieva]

Hello saravanan,

Please review the following help topic which elaborates on this matter.

I hope it helps.


All the best,
Maria Ilieva
the Telerik team

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