private async void GeoViewTapped(object sender, Esri.ArcGISRuntime.UI.Controls.GeoViewInputEventArgs e)
{
try
{
// Disregard if not ready for edits.
if (_readyForEdits == EditState.NotReady)
{
return;
}
// If an edit is in process, finish it.
if (_readyForEdits == EditState.Editing)
{
// Hold a list of any selected features.
List <Feature> selectedFeatures = new List <Feature>();
// Get all selected features then clear selection.
foreach (FeatureLayer layer in MyMapView.Map.OperationalLayers)
{
// Get the selected features.
FeatureQueryResult layerFeatures = await layer.GetSelectedFeaturesAsync();
// FeatureQueryResult implements IEnumerable, so it can be treated as a collection of features.
selectedFeatures.AddRange(layerFeatures);
// Clear the selection.
layer.ClearSelection();
}
// Update all selected feature geometry.
foreach (Feature feature in selectedFeatures)
{
// Get a reference to the correct feature table for the feature.
GeodatabaseFeatureTable table = (GeodatabaseFeatureTable)feature.FeatureTable;
// Ensure the geometry type of the table is point.
if (table.GeometryType != GeometryType.Point)
{
continue;
}
// Set the new geometry.
feature.Geometry = e.Location;
try
{
// Update the feature in the table.
await table.UpdateFeatureAsync(feature);
}
catch (Esri.ArcGISRuntime.ArcGISException)
{
ShowStatusMessage("Feature must be within extent of geodatabase.");
}
}
// Update the edit state.
_readyForEdits = EditState.Ready;
// Enable the sync button.
SyncButton.IsEnabled = true;
// Update the help label.
MyHelpLabel.Text = "4. Click 'Sync' or edit more features";
}
// Otherwise, start an edit.
else
{
// Define a tolerance for use with identifying the feature.
double tolerance = 15 * MyMapView.UnitsPerPixel;
// Define the selection envelope.
Envelope selectionEnvelope = new Envelope(e.Location.X - tolerance, e.Location.Y - tolerance, e.Location.X + tolerance, e.Location.Y + tolerance);
// Define query parameters for feature selection.
QueryParameters query = new QueryParameters()
{
Geometry = selectionEnvelope
};
// Track whether any selections were made.
bool selectedFeature = false;
// Select the feature in all applicable tables.
foreach (FeatureLayer layer in MyMapView.Map.OperationalLayers)
{
FeatureQueryResult res = await layer.SelectFeaturesAsync(query, SelectionMode.New);
selectedFeature = selectedFeature || res.Any();
}
// Only update state if a feature was selected.
if (selectedFeature)
{
// Set the edit state.
_readyForEdits = EditState.Editing;
// Update the help label.
MyHelpLabel.Text = "3. Tap on the map to move the point";
}
}
}
catch (Exception ex)
{
ShowStatusMessage(ex.ToString());
}
}