GridView.Loaded script timing issue?

Questions
#1

I have a GridView representing input sources. I have a script attached to the GridView.Loaded event so I can set the SelectedValue correctly based on whether the receiver is already turned on and, if so, what it’s input source is. Here is a fragment:

var avrSwitch = App.GetDeviceAttribute("Main.Switch");
var isAvrOn = (avrSwitch == "On");
alert("AVR state is " + avrSwitch);

In the designer simulator and on my iOS device, the alert displays that the AVR state is “unknown” even when it’s on or off.

But if I insert an alert("Starting") before anything else then the alert for the AVR state reports the correct value.

I suspect that the natural delay before I manually dismiss the “Starting” alert gives something in HR a chance to settle in so the Main.Switch value is then retrieved correctly.

Is there another way to accomplish this that would avoid whatever I’m running into? If I need to I can introduce an arbitrary delay into the script, but I’d rather avoid that if I could.

Thanks for any suggestions.

#2

Is this on your project’s start page?

What’s probably happening is you are showing the alert before the device is connected.

#3

Yes, it is on the start page.

Is there a way I can make sure the device is connected before querying HR about it?

#4

Sorry, there is not.