Queuing XAP file download request

Question

I have a silverlight application that will be used by >1000 users. Every fortnight the XAPs would be upgraded. The next day morning all access the page and for each user a copy of the silverlight XAP (application) is downloaded to the local machine via the browser. Since the number of users are more , there is possiblity of more network traffic. I want to stream line this by making sure the request to the download the XAP is queue and every 100 requestes are processed at a time. Let me know the possibilities.

Thanks

Aleksandr Dubinsky Aleksandr Dubinsky · Accepted Answer · 2012-12-21T18:05:24

I am assuming this is an Out-of-Browser Silverlight app? In this case, it must be calling Application.CheckAndDownloadUpdateAsync. Instead of doing this during application start-up, set up a DispatcherTimer that fires at some random time (eg, 0-60 minutes later) to do the check.

Find whereever CheckAndDownloadUpdateAsync is called and replace it with:

        var timer = new DispatcherTimer();
        timer.Interval = TimeSpan.FromMinutes(new Random().Next(60));
        timer.Tick += (sender, args) =>
        {
            Application.Current.CheckAndDownloadUpdateAsync();
            timer.Stop();
        };
        timer.Start();

(I've omitted wiring Application.Current.CheckAndDownloadUpdateCompleted, but this must be done before the timer is started.)

Queuing XAP file download request

2 Answers