3.4 Open online map

GisDevelop_Exp/MainWindow.xaml

@@ -15,8 +15,12 @@
             <MenuItem x:Name="Menu_File" Header="文件">
                 <MenuItem x:Name="Menu_OpenShp" Header="打开Shp" Click="Menu_OpenShp_Click"/>
                 <MenuItem x:Name="Menu_OpenGeodatabase" Header="打开Geodatabase" Click="Menu_OpenGeodatabase_Click"/>
+                <MenuItem x:Name="Menu_OpenOnlineMap" Header="打开在线地图" Click="Menu_OpenOnlineMap_OnClick"></MenuItem>
+            </MenuItem>
+            <MenuItem x:Name="Menu_View" Header="视图">
+                <MenuItem x:Name="Menu_Zoom_in" Header="放大" Click="Menu_Zoom_in_OnClick"></MenuItem>
+                <MenuItem x:Name="Menu_Zoom_out" Header="缩小" Click="Menu_Zoom_out_OnClick"></MenuItem>
             </MenuItem>
-            <MenuItem x:Name="Menu_View" Header="视图"/>
         </Menu>
         <esri:MapView x:Name="MainMapView" Map="{Binding Map, Source={StaticResource MapViewModel}}" Margin="0,19,0,0" ViewpointChanged="MainMapView_OnViewpointChanged"/>
         <Border BorderBrush="#FF8B1D76" BorderThickness="2,2,2,2" HorizontalAlignment="Right" Height="180" Width="202" VerticalAlignment="Top" IsEnabled="False">

GisDevelop_Exp/MainWindow.xaml.cs

@@ -16,7 +16,9 @@ using System.Windows.Navigation;
 using System.Windows.Shapes;
 using Esri.ArcGISRuntime.Geometry;
 using Esri.ArcGISRuntime.Symbology;
+using Esri.ArcGISRuntime.UI;
 using Color = System.Drawing.Color;
+using Polygon = Esri.ArcGISRuntime.Geometry.Polygon;
 
 namespace GisDevelop_Exp
 {
@@ -26,6 +28,10 @@ namespace GisDevelop_Exp
     public partial class MainWindow : Window
     {
         private FeatureLayer _featureLayer;
+
+        private string _statesUrl =
+            "https://services.arcgis.com/jIL9msH9OI208GCb/arcgis/rest/services/USA_Daytime_Population_2016/FeatureServer/0";
+        private ServiceFeatureTable _featureTable;
         public MainWindow()
         {
             InitializeComponent();
@@ -106,5 +112,87 @@ namespace GisDevelop_Exp
             graphicOverlay.Graphics.Add(envGraphic);
             EagleMapView.GraphicsOverlays.Add(graphicOverlay);
         }
+
+        private double GetDistance(MapPoint p1, MapPoint p2)
+        {
+            double dx = p2.X - p1.X;
+            double dy = p2.Y - p1.Y;
+            return Math.Sqrt(dx * dx + dy * dy);
+        }
+
+        private double GetAngle(MapPoint p1, MapPoint p2)
+        {
+            double dx = p2.X - p1.X;
+            double dy = p2.Y - p1.Y;
+            return Math.Atan2(dy, dx) * 180 / Math.PI;
+        }
+
+        private void Menu_Zoom_in_OnClick(object sender, RoutedEventArgs e)
+        {
+            try
+            {
+                Viewpoint initViewpoint = MainMapView.GetCurrentViewpoint(ViewpointType.CenterAndScale);
+                MainMapView.SetViewpointScaleAsync(initViewpoint.TargetScale / 2.0);
+            }
+            catch (Exception exception)
+            {
+                Console.WriteLine(exception);
+                throw;
+            }
+            
+        }
+
+        private void Menu_Zoom_out_OnClick(object sender, RoutedEventArgs e)
+        {
+            try
+            {
+                Viewpoint initViewpoint = MainMapView.GetCurrentViewpoint(ViewpointType.CenterAndScale);
+                MainMapView.SetViewpointScaleAsync(initViewpoint.TargetScale * 2.0);
+            }
+            catch (Exception exception)
+            {
+                Console.WriteLine(exception);
+                throw;
+            }
+        }
+
+        private void Menu_OpenOnlineMap_OnClick(object sender, RoutedEventArgs e)
+        {
+            OpenOnlineData();
+        }
+
+        private async void OpenOnlineData()
+        {
+            Map pMap = new Map();
+            pMap.Basemap=new Basemap(BasemapStyle.ArcGISTopographicBase);
+            _featureTable = new ServiceFeatureTable(new Uri(_statesUrl));
+            _featureLayer = new FeatureLayer(_featureTable);
+            _featureLayer.MaxScale = 1.0;
+            await _featureLayer.LoadAsync();
+            Viewpoint pVP = new Viewpoint(_featureLayer.FullExtent);
+            pMap.InitialViewpoint = pVP;
+            SimpleMarkerSymbol pMarkerSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle.Circle, Color.Blue, 5.0);
+            SimpleLineSymbol pLineSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.Red, 5.0);
+            SimpleFillSymbol pFillSymbol = new SimpleFillSymbol(SimpleFillSymbolStyle.Solid, Color.Pink, pLineSymbol);
+            SimpleRenderer pRenderer = new SimpleRenderer();
+            if (_featureLayer.FeatureTable.GeometryType == GeometryType.Polygon)
+            {
+                pRenderer.Symbol = pFillSymbol;
+            }else if (_featureLayer.FeatureTable.GeometryType == GeometryType.Point)
+            {
+                pRenderer.Symbol = pMarkerSymbol;
+            }else if (_featureLayer.FeatureTable.GeometryType == GeometryType.Polyline)
+            {
+                pRenderer.Symbol = pLineSymbol;
+            }
+            else
+            {
+                pRenderer.Symbol = pFillSymbol;
+            }
+            _featureLayer.Renderer = pRenderer;
+            pMap.OperationalLayers.Add(_featureLayer);
+            MainMapView.Map = pMap;
+            MainMapView.SelectionProperties.Color = Color.Cyan;
+        }
     }
 }

GisDevelop_Exp/MapViewModel.cs

@@ -26,7 +26,6 @@ namespace GisDevelop_Exp
             _map = new Map(SpatialReferences.WebMercator)
             {
                 InitialViewpoint = new Viewpoint(new Envelope(-180, -85, 180, 85, SpatialReferences.Wgs84)),
-#warning To use ArcGIS location services (including basemaps) specify your API Key access token or require the user to sign in using a valid ArcGIS account.
                 Basemap = new Basemap(BasemapStyle.ArcGISTopographic)
             };
         }