RobotApp disconnects from a opc server after window being minimized

[rudoc]

Dear Andrew, thanks for the great example of OPC UA application! I am using UWP RobotApp part of your project with connection to Codesys RTE. I have found that in couple of seconds after being minimized RobotApp client disconnects from a server. When running in full screen or window mode connection remains stable. I suspect that this is drawback from v1.4.1 release. Could you please confirm if this behavior is common or i should be checking my setup?

[rudoc]

I was able to reproduce the behavior of the RobotApp application from current project: 1.Deploy the RobotApp (Debug mode)

2. Run RobotServer
3. Run RobotApp
4. Wait for connection with RobotServer
5. Minimize RobotApp window… - disconnection in 2-3 seconds. When I started both projects from VS IDE, RobotApp stayed connected even being minimized. Win10x64 +VS2017.

[awcullen]

I not sure if I agree with Microsoft on this one, but an App is placed in Suspended state when minimized. See the first part of this blog post: the-lifecycle-of-a-uwp-app

In 'app.xaml.cs', you can try removing this code:

public async override Task OnSuspendingAsync(object s, SuspendingEventArgs e, bool prelaunchActivated)
{
    await this.container.Resolve<PLC1Session>().SuspendAsync();
}

public override void OnResuming(object s, object e, AppExecutionState previousExecutionState)
{
    this.container.Resolve<PLC1Session>().Resume();
}

[rudoc]

Andrew! Thanks for the pointing the disconnection reason. Unfortunately, removing the code above did not help. I will think on workaround for this.