private async void Initialize()
{
// Hook up the DrawStatusChanged event.
MyMapView.DrawStatusChanged += OnDrawStatusChanged;
// Construct the map and set the MapView.Map property.
Map map = new Map(BasemapStyle.ArcGISLightGray);
MyMapView.Map = map;
try
{
// Create a ClosestFacilityTask using the San Diego Uri.
_task = await ClosestFacilityTask.CreateAsync(new Uri("https://sampleserver6.arcgisonline.com/arcgis/rest/services/NetworkAnalysis/SanDiego/NAServer/ClosestFacility"));
// List of facilities to be placed around San Diego area.
_facilities = new List <Facility> {
new Facility(new MapPoint(-1.3042129900625112E7, 3860127.9479775648, SpatialReferences.WebMercator)),
new Facility(new MapPoint(-1.3042193400557665E7, 3862448.873041752, SpatialReferences.WebMercator)),
new Facility(new MapPoint(-1.3046882875518233E7, 3862704.9896770366, SpatialReferences.WebMercator)),
new Facility(new MapPoint(-1.3040539754780494E7, 3862924.5938606677, SpatialReferences.WebMercator)),
new Facility(new MapPoint(-1.3042571225655518E7, 3858981.773018156, SpatialReferences.WebMercator)),
new Facility(new MapPoint(-1.3039784633928463E7, 3856692.5980474586, SpatialReferences.WebMercator)),
new Facility(new MapPoint(-1.3049023883956768E7, 3861993.789732541, SpatialReferences.WebMercator))
};
// Center the map on the San Diego facilities.
Envelope fullExtent = GeometryEngine.CombineExtents(_facilities.Select(facility => facility.Geometry));
await MyMapView.SetViewpointGeometryAsync(fullExtent, 50);
// Create a symbol for displaying facilities.
_facilitySymbol = new PictureMarkerSymbol(new Uri("https://static.arcgis.com/images/Symbols/SafetyHealth/Hospital.png"))
{
Height = 30,
Width = 30
};
// Incident symbol.
_incidentSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle.Cross, Color.FromArgb(255, 0, 0, 0), 30);
// Route to hospital symbol.
_routeSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.FromArgb(255, 0, 0, 255), 5.0f);
// Create Graphics Overlays for incidents and facilities.
_incidentGraphicsOverlay = new GraphicsOverlay();
_facilityGraphicsOverlay = new GraphicsOverlay();
// Create a graphic and add to graphics overlay for each facility.
foreach (Facility facility in _facilities)
{
_facilityGraphicsOverlay.Graphics.Add(new Graphic(facility.Geometry, _facilitySymbol));
}
// Add each graphics overlay to MyMapView.
MyMapView.GraphicsOverlays.Add(_incidentGraphicsOverlay);
MyMapView.GraphicsOverlays.Add(_facilityGraphicsOverlay);
}
catch (Exception e)
{
MessageBox.Show(e.ToString(), "Error");
}
}
private async void Initialize()
{
try
{
// Construct the map and set the MapView.Map property.
MyMapView.Map = new Map(Basemap.CreateLightGrayCanvasVector());
// Add a graphics overlay to MyMapView. (Will be used later to display routes)
MyMapView.GraphicsOverlays.Add(new GraphicsOverlay());
// Create a ClosestFacilityTask using the San Diego Uri.
_task = await ClosestFacilityTask.CreateAsync(_closestFacilityUri);
// Create a symbol for displaying facilities.
PictureMarkerSymbol facilitySymbol = new PictureMarkerSymbol(new Uri("https://static.arcgis.com/images/Symbols/SafetyHealth/FireStation.png"))
{
Height = 30,
Width = 30
};
// Incident symbol.
PictureMarkerSymbol incidentSymbol = new PictureMarkerSymbol(new Uri("https://static.arcgis.com/images/Symbols/SafetyHealth/esriCrimeMarker_56_Gradient.png"))
{
Height = 30,
Width = 30
};
// Create a list of line symbols to show unique routes. Different colors help make different routes visually distinguishable.
_routeSymbols = new List <SimpleLineSymbol>()
{
new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, System.Drawing.Color.FromArgb(125, 25, 45, 85), 5.0f),
new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, System.Drawing.Color.FromArgb(125, 35, 65, 120), 5.0f),
new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, System.Drawing.Color.FromArgb(125, 55, 100, 190), 5.0f),
new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, System.Drawing.Color.FromArgb(125, 75, 140, 255), 5.0f)
};
// Create a table for facilities using the FeatureServer.
_facilityTable = new ServiceFeatureTable(_facilityUri);
// Create a feature layer from the table.
_facilityLayer = new FeatureLayer(_facilityTable)
{
Renderer = new SimpleRenderer(facilitySymbol)
};
// Create a table for facilities using the FeatureServer.
_incidentTable = new ServiceFeatureTable(_incidentUri);
// Create a feature layer from the table.
_incidentLayer = new FeatureLayer(_incidentTable)
{
Renderer = new SimpleRenderer(incidentSymbol)
};
// Add the layers to the map.
MyMapView.Map.OperationalLayers.Add(_facilityLayer);
MyMapView.Map.OperationalLayers.Add(_incidentLayer);
// Wait for both layers to load.
await _facilityLayer.LoadAsync();
await _incidentLayer.LoadAsync();
// Zoom to the combined extent of both layers.
Envelope fullExtent = GeometryEngine.CombineExtents(_facilityLayer.FullExtent, _incidentLayer.FullExtent);
await MyMapView.SetViewpointGeometryAsync(fullExtent, 50);
// Enable the solve button.
SolveRoutesButton.IsEnabled = true;
}
catch (Exception exception)
{
await Application.Current.MainPage.DisplayAlert("Error", "An exception has occurred.\n" + exception.Message, "OK");
}
}
