Find route

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
// Copyright 2017 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
// You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
// language governing permissions and limitations under the License.

using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.Symbology;
using Esri.ArcGISRuntime.Tasks.NetworkAnalysis;
using Esri.ArcGISRuntime.UI;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows;

namespace ArcGIS.WPF.Samples.FindRoute
{
    [ArcGIS.Samples.Shared.Attributes.Sample(
        name: "Find route",
        category: "Network analysis",
        description: "Display directions for a route between two points.",
        instructions: "For simplicity, the sample comes loaded with a start and end stop. You can click on the Find Route button to display a route between these stops. Once the route is generated, turn-by-turn directions are shown in a list.",
        tags: new[] { "directions", "driving", "navigation", "network", "network analysis", "route", "routing", "shortest path", "turn-by-turn" })]
    public partial class FindRoute
    {
        // List of stops on the route ('from' and 'to')
        private List<Stop> _routeStops;

        // Graphics overlay to display stops and the route result
        private GraphicsOverlay _routeGraphicsOverlay;

        // URI for the San Diego route service
        private Uri _sanDiegoRouteServiceUri = new Uri("https://sampleserver6.arcgisonline.com/arcgis/rest/services/NetworkAnalysis/SanDiego/NAServer/Route");

        // URIs for picture marker images
        private Uri _checkedFlagIconUri = new Uri("https://static.arcgis.com/images/Symbols/Transportation/CheckeredFlag.png");

        private Uri _carIconUri = new Uri("https://static.arcgis.com/images/Symbols/Transportation/CarRedFront.png");

        public FindRoute()
        {
            InitializeComponent();

            // Create the map, graphics overlay, and the 'from' and 'to' locations for the route
            Initialize();
        }

        private void Initialize()
        {
            // Define the route stop locations (points)
            MapPoint fromPoint = new MapPoint(-117.15494348793044, 32.706506537686927, SpatialReferences.Wgs84);
            MapPoint toPoint = new MapPoint(-117.14905088669816, 32.735308180609138, SpatialReferences.Wgs84);

            // Create Stop objects with the points and add them to a list of stops
            Stop stop1 = new Stop(fromPoint);
            Stop stop2 = new Stop(toPoint);
            _routeStops = new List<Stop> { stop1, stop2 };

            // Picture marker symbols: from = car, to = checkered flag
            PictureMarkerSymbol carSymbol = new PictureMarkerSymbol(_carIconUri);
            PictureMarkerSymbol flagSymbol = new PictureMarkerSymbol(_checkedFlagIconUri);

            // Add a slight offset (pixels) to the picture symbols.
            carSymbol.OffsetX = -carSymbol.Width / 2;
            carSymbol.OffsetY = -carSymbol.Height / 2;
            flagSymbol.OffsetX = -flagSymbol.Width / 2;
            flagSymbol.OffsetY = -flagSymbol.Height / 2;

            // Create graphics for the stops
            Graphic fromGraphic = new Graphic(fromPoint, carSymbol) { ZIndex = 1 };
            Graphic toGraphic = new Graphic(toPoint, flagSymbol) { ZIndex = 1 };

            // Create the graphics overlay and add the stop graphics
            _routeGraphicsOverlay = new GraphicsOverlay();
            _routeGraphicsOverlay.Graphics.Add(fromGraphic);
            _routeGraphicsOverlay.Graphics.Add(toGraphic);

            // Get an Envelope that covers the area of the stops (and a little more)
            Envelope routeStopsExtent = new Envelope(fromPoint, toPoint);
            EnvelopeBuilder envBuilder = new EnvelopeBuilder(routeStopsExtent);
            envBuilder.Expand(1.5);

            // Create a new viewpoint apply it to the map view when the spatial reference changes
            Viewpoint sanDiegoViewpoint = new Viewpoint(envBuilder.ToGeometry());
            MyMapView.SpatialReferenceChanged += (s, e) => MyMapView.SetViewpoint(sanDiegoViewpoint);

            // Add a new Map and the graphics overlay to the map view
            MyMapView.Map = new Map(BasemapStyle.ArcGISStreets);
            MyMapView.GraphicsOverlays.Add(_routeGraphicsOverlay);
        }

        private async void SolveRouteClick(object sender, System.Windows.RoutedEventArgs e)
        {
            try
            {
                // Create a new route task using the San Diego route service URI
                RouteTask solveRouteTask = await RouteTask.CreateAsync(_sanDiegoRouteServiceUri);

                // Get the default parameters from the route task (defined with the service)
                RouteParameters routeParams = await solveRouteTask.CreateDefaultParametersAsync();

                // Make some changes to the default parameters
                routeParams.ReturnStops = true;
                routeParams.ReturnDirections = true;

                // Set the list of route stops that were defined at startup
                routeParams.SetStops(_routeStops);

                // Solve for the best route between the stops and store the result
                RouteResult solveRouteResult = await solveRouteTask.SolveRouteAsync(routeParams);

                // Get the first (should be only) route from the result
                Route firstRoute = solveRouteResult.Routes.First();

                // Get the route geometry (polyline)
                Polyline routePolyline = firstRoute.RouteGeometry;

                // Create a thick purple line symbol for the route
                SimpleLineSymbol routeSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.Purple, 8.0);

                // Create a new graphic for the route geometry and add it to the graphics overlay
                Graphic routeGraphic = new Graphic(routePolyline, routeSymbol) { ZIndex = 0 };
                _routeGraphicsOverlay.Graphics.Add(routeGraphic);

                // Get a list of directions for the route and display it in the list box
                IReadOnlyList<DirectionManeuver> directionsList = firstRoute.DirectionManeuvers;
                DirectionsListBox.ItemsSource = directionsList;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString(), "Error");
            }
        }

        private void ResetClick(object sender, System.Windows.RoutedEventArgs e)
        {
            // Clear the list of directions
            DirectionsListBox.ItemsSource = null;

            // Remove the route graphic from the graphics overlay (only line graphic in the collection)
            int graphicsCount = _routeGraphicsOverlay.Graphics.Count;
            for (int i = graphicsCount; i > 0; i--)
            {
                // Get this graphic and see if it has line geometry
                Graphic g = _routeGraphicsOverlay.Graphics[i - 1];
                if (g.Geometry.GeometryType == GeometryType.Polyline)
                {
                    // Remove the graphic from the overlay
                    _routeGraphicsOverlay.Graphics.Remove(g);
                }
            }
        }
    }
}