private async void Initialize()
{
try
{
// Load the mobile map package.
_mobileMapPackage = new MobileMapPackage(DataManager.GetDataFolder("b87307dcfb26411eb2e92e1627cb615b", "GasDeviceAnno.mmpk"));
await _mobileMapPackage.LoadAsync();
// Set the mapview to display the map from the package.
_myMapView.Map = _mobileMapPackage.Maps.First();
// Get the annotation layer from the MapView operational layers.
AnnotationLayer annotationLayer = (AnnotationLayer)_myMapView.Map.OperationalLayers.Where(layer => layer is AnnotationLayer).First();
// Load the annotation layer.
await annotationLayer.LoadAsync();
// Get the annotation sub layers.
_closedSublayer = (AnnotationSublayer)annotationLayer.SublayerContents[0];
_openSublayer = (AnnotationSublayer)annotationLayer.SublayerContents[1];
// Set the label content.
_openLabel.Text = $"{_openSublayer.Name} (1:{_openSublayer.MaxScale} - 1:{_openSublayer.MinScale})";
_closedLabel.Text = _closedSublayer.Name;
// Enable the check boxes.
_openSwitch.Enabled = true;
_closedSwitch.Enabled = true;
// Add event handler for changing the text to indicate whether the "open" sublayer is visible at the current scale.
_myMapView.ViewpointChanged += (s, e) =>
{
// Check if the sublayer is visible at the current map scale.
if (_openSublayer.IsVisibleAtScale(_myMapView.MapScale))
{
_openLabel.TextColor = UIColor.Black;
}
else
{
_openLabel.TextColor = UIColor.Gray;
}
// Set the current map scale text.
_scaleLabel.Text = "Current map scale: 1:" + (int)_myMapView.MapScale;
};
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
