Question

I seem to be having an odd issue w/ the ApplicationDeployment.CheckForUpdateAsync Method. I have it, currently, on a timer, that checks the server for an update at a predetermined interval. The reason for this is that we need to ensure everyone is on the latest release, and when a new release is available, to notify everyone that it’s available.

However, while it works fine if the server is online, if there is a networking error, or the server goes offline during the check, .NET returns a Socket or WebException error.

I have tried to catch the errors:

        try
        {
            _ad.CheckForUpdateAsync();
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }

For example, but even if i put WebException or any other type of exception in that catch, it doesn’t seem to catch it. I assume that’s because the CheckForUpdateAsync() takes place on a seperate thread.

Is there any way to reliably catch those errors so i do not have random .NET errors popping up during operation?

Answer 1

you can check errors on ApplicationDeployment.CheckForUpdateAsync Method by adding CheckForUpdateCompleted even as below

ApplicationDeployment ad = ApplicationDeployment.CurrentDeployment;
ad.CheckForUpdateCompleted += new CheckForUpdateCompletedEventHandler(ad_CheckForUpdateCompleted);

in the

void ad_CheckForUpdateCompleted(object sender, CheckForUpdateCompletedEventArgs e)
{
    if (e.Error != null)
    {
       // e.Error details here 
    }
}

you can find InvalidDeploymentException and DeploymentDownloadException details from the Error property of the CheckForUpdateCompleted event.