Update Out Of Browser (OOB) Silverlight apps

Once your Silverlight application installed on the local computer what happens if there is an update ?

The local application is not updated automatically but you can check that in your code. The CheckAndDownloadUpdateAsync() method downloads the updated application if available and you can notify the user.

I put this code in the constructor of the App:

App.xaml.cs:

public App()
{
    this.Startup += this.Application_Startup;
    this.UnhandledException += this.Application_UnhandledException;

    InitializeComponent();

    if (Application.Current.IsRunningOutOfBrowser)
    {
        App.Current.CheckAndDownloadUpdateCompleted += 
            new CheckAndDownloadUpdateCompletedEventHandler(CheckAndDownloadUpdateCompleted);
        App.Current.CheckAndDownloadUpdateAsync();
    }
}

void CheckAndDownloadUpdateCompleted(object sender, CheckAndDownloadUpdateCompletedEventArgs e)
{
    if (e.Error == null && e.UpdateAvailable)
    {
        MessageBox.Show("Application updated, please restart to apply changes.");
    }
}

Some points to mention:

• By default OOB do not automatically check for update.
• Use CheckAndDownloadUpdateAsync() method which check, download and install updates for you.
• There is no way to separate the Check from the Download…