private async void LoadLayers_Clicked(object sender, RoutedEventArgs e)
{
// Skip if nothing selected.
if (OgcFeatureCollectionList.SelectedItems.Count < 1)
{
return;
}
// Show the progress bar.
LoadingProgressBar.Visibility = Visibility.Visible;
// Clear the existing layers.
MyMapView.Map.OperationalLayers.Clear();
try
{
// Get the selected collection.
OgcFeatureCollectionInfo selectedCollectionInfo = (OgcFeatureCollectionInfo)OgcFeatureCollectionList.SelectedItems[0];
// Create the OGC feature collection table.
OgcFeatureCollectionTable table = new OgcFeatureCollectionTable(selectedCollectionInfo);
// Set the feature request mode to manual (only manual is currently supported).
// In this mode, you must manually populate the table - panning and zooming won't request features automatically.
table.FeatureRequestMode = FeatureRequestMode.ManualCache;
// Populate the OGC feature collection table.
QueryParameters queryParamaters = new QueryParameters();
queryParamaters.MaxFeatures = 1000;
await table.PopulateFromServiceAsync(queryParamaters, false, null);
// Create a feature layer from the OGC feature collection table.
FeatureLayer ogcFeatureLayer = new FeatureLayer(table);
// Choose a renderer for the layer based on the table.
ogcFeatureLayer.Renderer = GetRendererForTable(table) ?? ogcFeatureLayer.Renderer;
// Add the layer to the map.
MyMapView.Map.OperationalLayers.Add(ogcFeatureLayer);
// Zoom to the extent of the selected collection.
if (selectedCollectionInfo.Extent is Envelope collectionExtent && !collectionExtent.IsEmpty)
{
await MyMapView.SetViewpointGeometryAsync(collectionExtent, 100);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
await new MessageDialog(ex.Message, "Error loading service").ShowAsync();
}
finally
{
// Hide the progress bar.
LoadingProgressBar.Visibility = Visibility.Collapsed;
}
}
private async void LayerMenu_LayerSelected(object sender, PopupMenu.MenuItemClickEventArgs e)
{
// Show the progress bar.
_loadingProgressBar.Visibility = ViewStates.Visible;
// Clear the existing layers.
_myMapView.Map.OperationalLayers.Clear();
try
{
// Get the selected collection.
OgcFeatureCollectionInfo selectedCollectionInfo = _serviceInfo.FeatureCollectionInfos[e.Item.Order];
// Create the OGC feature collection table.
OgcFeatureCollectionTable table = new OgcFeatureCollectionTable(selectedCollectionInfo);
// Set the feature request mode to manual (only manual is currently supported).
// In this mode, you must manually populate the table - panning and zooming won't request features automatically.
table.FeatureRequestMode = FeatureRequestMode.ManualCache;
// Populate the OGC feature collection table.
QueryParameters queryParamaters = new QueryParameters();
queryParamaters.MaxFeatures = 1000;
await table.PopulateFromServiceAsync(queryParamaters, false, null);
// Create a feature layer from the OGC feature collection table.
FeatureLayer ogcFeatureLayer = new FeatureLayer(table);
// Choose a renderer for the layer based on the table.
ogcFeatureLayer.Renderer = GetRendererForTable(table) ?? ogcFeatureLayer.Renderer;
// Add the layer to the map.
_myMapView.Map.OperationalLayers.Add(ogcFeatureLayer);
// Zoom to the extent of the selected collection.
if (selectedCollectionInfo.Extent is Envelope collectionExtent && !collectionExtent.IsEmpty)
{
await _myMapView.SetViewpointGeometryAsync(collectionExtent, 100);
}
}
catch (Exception exception)
{
System.Diagnostics.Debug.WriteLine(exception);
new AlertDialog.Builder(this).SetMessage(exception.ToString()).SetTitle("Couldn't load layer.").Show();
}
finally
{
// Hide the progress bar.
_loadingProgressBar.Visibility = ViewStates.Gone;
}
}
private async void LoadSelectedLayer(OgcFeatureCollectionInfo selectedLayerInfo)
{
// Show the progress bar.
_loadingProgressBar.StartAnimating();
// Clear the existing layers.
_myMapView.Map.OperationalLayers.Clear();
try
{
// Create the OGC feature collection table.
OgcFeatureCollectionTable table = new OgcFeatureCollectionTable(selectedLayerInfo);
// Set the feature request mode to manual (only manual is currently supported).
// In this mode, you must manually populate the table - panning and zooming won't request features automatically.
table.FeatureRequestMode = FeatureRequestMode.ManualCache;
// Populate the OGC feature collection table.
QueryParameters queryParamaters = new QueryParameters();
queryParamaters.MaxFeatures = 1000;
await table.PopulateFromServiceAsync(queryParamaters, false, null);
// Create a feature layer from the OGC feature collection table.
FeatureLayer ogcFeatureLayer = new FeatureLayer(table);
// Choose a renderer for the layer based on the table.
ogcFeatureLayer.Renderer = GetRendererForTable(table) ?? ogcFeatureLayer.Renderer;
// Add the layer to the map.
_myMapView.Map.OperationalLayers.Add(ogcFeatureLayer);
// Zoom to the extent of the selected collection.
if (selectedLayerInfo.Extent is Envelope collectionExtent && !collectionExtent.IsEmpty)
{
await _myMapView.SetViewpointGeometryAsync(collectionExtent, 100);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
new UIAlertView("Couldn't load layer.", ex.Message, (IUIAlertViewDelegate)null, "OK", null).Show();
}
finally
{
// Hide the progress bar.
_loadingProgressBar.StopAnimating();
}
}
private async void Initialize()
{
// Create the map with topographic basemap.
MyMapView.Map = new Map(BasemapStyle.ArcGISTopographic);
try
{
// Create the feature table from URI and collection id.
_featureTable = new OgcFeatureCollectionTable(new Uri(ServiceUrl), CollectionId);
// Set the feature request mode to manual (only manual is currently supported).
// In this mode, you must manually populate the table - panning and zooming won't request features automatically.
_featureTable.FeatureRequestMode = FeatureRequestMode.ManualCache;
// Load the table.
await _featureTable.LoadAsync();
// Create a feature layer to visualize the OAFeat features.
FeatureLayer ogcFeatureLayer = new FeatureLayer(_featureTable);
// Apply a renderer.
ogcFeatureLayer.Renderer = new SimpleRenderer(new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.Blue, 3));
// Add the layer to the map.
MyMapView.Map.OperationalLayers.Add(ogcFeatureLayer);
// Use the navigation completed event to populate the table with the features needed for the current extent.
MyMapView.NavigationCompleted += MapView_NavigationCompleted;
// Zoom to a small area within the dataset by default.
Envelope datasetExtent = _featureTable.Extent;
if (datasetExtent != null && !datasetExtent.IsEmpty)
{
await MyMapView.SetViewpointGeometryAsync(new Envelope(datasetExtent.GetCenter(), datasetExtent.Width / 3, datasetExtent.Height / 3));
}
}
catch (Exception ex)
{
await new MessageDialog(ex.Message, "Error").ShowAsync();
}
}
