2-1 Query function

GisDevelop_Exp/MainWindow.xaml

@@ -24,6 +24,11 @@
                 <MenuItem x:Name="Menu_Full_Extent" Header="全图" Click="Menu_Full_Extent_OnClick"></MenuItem>
                 <MenuItem x:Name="Menu_Wrap_Around" Header="开启漫游" Click="Menu_Wrap_Around_OnClick"></MenuItem>
             </MenuItem>
+            <MenuItem x:Name="Menu_Identify" Header="查询">
+                <MenuItem x:Name="Menu_Simple_Identify" Header="简单查询" Click="Menu_Simple_Identify_OnClick"></MenuItem>
+                <MenuItem x:Name="Menu_Click_Indentify" Header="点击查询" Click="Menu_Click_Indentify_OnClick"></MenuItem>
+                <MenuItem x:Name="Menu_Identify_Indentify" Header="Indentify查询" Click="Menu_Identify_Indentify_OnClick"></MenuItem>
+            </MenuItem>
         </Menu>
         <esri:MapView x:Name="MainMapView" Map="{Binding Map, Source={StaticResource MapViewModel}}" Margin="0,19,0,0" ViewpointChanged="MainMapView_OnViewpointChanged" GeoViewTapped="MainMapView_OnGeoViewTapped"/>
         <Border BorderBrush="#FF8B1D76" BorderThickness="2,2,2,2" HorizontalAlignment="Right" Height="180" Width="202" VerticalAlignment="Top" IsEnabled="False">

GisDevelop_Exp/MainWindow.xaml.cs

@@ -24,6 +24,14 @@ using Color = System.Drawing.Color;
 using Geometry = Esri.ArcGISRuntime.Geometry.Geometry;
 using Polygon = Esri.ArcGISRuntime.Geometry.Polygon;
 
+enum CURRENTOPERATION
+{
+    NullOpe = -1,
+    SelectQuery = 0,
+    IdentifyQuery,
+    PanMap,
+}
+
 namespace GisDevelop_Exp
 {
     /// <summary>
@@ -35,6 +43,7 @@ namespace GisDevelop_Exp
 
         private string _statesUrl =
             "https://services.arcgis.com/jIL9msH9OI208GCb/arcgis/rest/services/USA_Daytime_Population_2016/FeatureServer/0";
+
         private ServiceFeatureTable _featureTable;
 
         private readonly Dictionary<string, Basemap> _basemapOptions = new Dictionary<string, Basemap>()
@@ -51,9 +60,13 @@ namespace GisDevelop_Exp
             { "Navigation (Vector)", new Basemap(BasemapStyle.ArcGISNavigation) },
             { "OpenStreetMap (Raster)", new Basemap(BasemapStyle.OSMNavigation) }
         };
+
+        private CURRENTOPERATION m_CurOper;
+
         public MainWindow()
         {
             InitializeComponent();
+            m_CurOper = CURRENTOPERATION.NullOpe;
             Initialize();
             EagleMapView.Map = new Map(BasemapStyle.ArcGISImageryStandard);
         }
@@ -67,10 +80,11 @@ namespace GisDevelop_Exp
                 "AAPTxy8BH1VEsoebNVZXo8HurGPYSDOnAeIwA4pOmn4FxRfMsbp3zN7aIhAzuRolPS6JUAtf98pdWdQp1jjclJhIB-7QXbTXrBITqXti07DnOLsRnS9lGLYGImGh5vW_jSlnEBqxbbZQCs4S0y5-tHC0_kSFW9RD3Kv8hiDGt1IGSrs-96vwz6rycPenwu_cAwZHZyTahSAEHOR5A7j2y9sUsZ8HoYLcn2O9SI8OYw2tzr4xAAwqN1fcw6FMiVVpBSYWAT1_A4CN5Ivr";
             InitializeAuthenticationManagerWithToken(token);
         }
-        
+
         private void InitializeAuthenticationManagerWithToken(string token)
         {
-            AuthenticationManager.Current.AddCredential(new OAuthTokenCredential(new Uri("https://services3.arcgis.com/Po7vxnPH4Do7ht5I/arcgis/rest/services/test/MapServer"),token));
+            AuthenticationManager.Current.AddCredential(new OAuthTokenCredential(
+                new Uri("https://services3.arcgis.com/Po7vxnPH4Do7ht5I/arcgis/rest/services/test/MapServer"), token));
         }
 
         private void Menu_OpenShp_Click(object sender, RoutedEventArgs e)
@@ -104,10 +118,11 @@ namespace GisDevelop_Exp
             Geodatabase _localGeodatabase;
             System.Windows.Forms.OpenFileDialog fileDialog = new System.Windows.Forms.OpenFileDialog();
             fileDialog.Filter = "Geodatabase文件(*.geodatabase)|*.geodatabase";
-            if(fileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
+            if (fileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
             {
                 _slocalGeodatabasePath = fileDialog.FileName;
             }
+
             if (System.IO.File.Exists(_slocalGeodatabasePath))
             {
                 _localGeodatabase = await Geodatabase.OpenAsync(_slocalGeodatabasePath);
@@ -122,6 +137,7 @@ namespace GisDevelop_Exp
                     geodatabaseMap.OperationalLayers.Add(layer);
                     _featureLayer = layer;
                 }
+
                 Viewpoint geodatabaseViewPoint = new Viewpoint(_featureLayer.FullExtent);
                 geodatabaseMap.InitialViewpoint = geodatabaseViewPoint;
                 MainMapView.Map = geodatabaseMap;
@@ -139,7 +155,8 @@ namespace GisDevelop_Exp
             Esri.ArcGISRuntime.Geometry.Polygon vExtent = MainMapView.VisibleArea;
             Envelope eagleViewEnvelop = vExtent.Extent;
             Color lineColor = Color.FromArgb(255, 255, 0, 0);
-            SimpleLineSymbol lineSymbol = new Esri.ArcGISRuntime.Symbology.SimpleLineSymbol(SimpleLineSymbolStyle.Dash, lineColor,2.0);
+            SimpleLineSymbol lineSymbol =
+                new Esri.ArcGISRuntime.Symbology.SimpleLineSymbol(SimpleLineSymbolStyle.Dash, lineColor, 2.0);
             Color fillColor = Color.FromArgb(0, 0, 0, 0);
             SimpleFillSymbol fillSymbol = new SimpleFillSymbol(SimpleFillSymbolStyle.Solid, fillColor, lineSymbol);
             var graphicOverlay = new Esri.ArcGISRuntime.UI.GraphicsOverlay();
@@ -174,7 +191,6 @@ namespace GisDevelop_Exp
                 Console.WriteLine(exception);
                 throw;
             }
-            
         }
 
         private void Menu_Zoom_out_OnClick(object sender, RoutedEventArgs e)
@@ -200,7 +216,7 @@ namespace GisDevelop_Exp
         private async void OpenOnlineData()
         {
             Map pMap = new Map();
-            pMap.Basemap=new Basemap(BasemapStyle.ArcGISTopographicBase);
+            pMap.Basemap = new Basemap(BasemapStyle.ArcGISTopographicBase);
             _featureTable = new ServiceFeatureTable(new Uri(_statesUrl));
             _featureLayer = new FeatureLayer(_featureTable);
             _featureLayer.MaxScale = 1.0;
@@ -214,10 +230,12 @@ namespace GisDevelop_Exp
             if (_featureLayer.FeatureTable.GeometryType == GeometryType.Polygon)
             {
                 pRenderer.Symbol = pFillSymbol;
-            }else if (_featureLayer.FeatureTable.GeometryType == GeometryType.Point)
+            }
+            else if (_featureLayer.FeatureTable.GeometryType == GeometryType.Point)
             {
                 pRenderer.Symbol = pMarkerSymbol;
-            }else if (_featureLayer.FeatureTable.GeometryType == GeometryType.Polyline)
+            }
+            else if (_featureLayer.FeatureTable.GeometryType == GeometryType.Polyline)
             {
                 pRenderer.Symbol = pLineSymbol;
             }
@@ -225,6 +243,7 @@ namespace GisDevelop_Exp
             {
                 pRenderer.Symbol = pFillSymbol;
             }
+
             _featureLayer.Renderer = pRenderer;
             pMap.OperationalLayers.Add(_featureLayer);
             MainMapView.Map = pMap;
@@ -277,7 +296,7 @@ namespace GisDevelop_Exp
             ArcGISPortal portal = await ArcGISPortal.CreateAsync();
             // Create a portal item from the ArcGIS Portal object using a portal item string.
             PortalItem portalItem = await PortalItem.CreateAsync(portal, "29d7c59212ef479995f5b42bacc9de4c");
-            FeatureLayer featureLayer = new FeatureLayer(portalItem,0);
+            FeatureLayer featureLayer = new FeatureLayer(portalItem, 0);
             map.OperationalLayers.Add(featureLayer);
             MainMapView.Map = map;
         }
@@ -287,9 +306,146 @@ namespace GisDevelop_Exp
             MapPoint mapLocation = e.Location;
             Geometry myGeometry = mapLocation.Project(SpatialReferences.Wgs84);
             MapPoint projectedLocation = (MapPoint)myGeometry;
-            string mapLocationDescription = string.Format("纬度: {0:F3} 经度:{1:F3}", projectedLocation.Y, projectedLocation.X);
+            string mapLocationDescription =
+                string.Format("纬度: {0:F3} 经度:{1:F3}", projectedLocation.Y, projectedLocation.X);
             CalloutDefinition myCalloutDefinition = new CalloutDefinition("当前位置：", mapLocationDescription);
             MainMapView.ShowCalloutAt(mapLocation, myCalloutDefinition);
+            if (m_CurOper == CURRENTOPERATION.SelectQuery)
+            {
+                if (MainMapView.Map.OperationalLayers.Count > 0)
+                {
+                    FeatureLayer _featureLayer = MainMapView.Map.OperationalLayers.First() as FeatureLayer;
+                    if (_featureLayer != null)
+                    {
+                        FunClickQuery(e.Location, _featureLayer);
+                    }
+                }
+            }else if (m_CurOper == CURRENTOPERATION.IdentifyQuery)
+            {
+                if (MainMapView.Map.OperationalLayers.Count > 0)
+                {
+                    FeatureLayer _featureLayer = MainMapView.Map.OperationalLayers.First() as FeatureLayer;
+                    if (_featureLayer != null)
+                    {
+                        FunIndentifyQuery(e.Position, _featureLayer);
+                    }
+                }
+            }
+        }
+
+        private void Menu_Simple_Identify_OnClick(object sender, RoutedEventArgs e)
+        {
+            string sQueryFieldName = "Name";
+            string stateName = "New York";
+            FeatureLayer _featureLayer = MainMapView.Map.OperationalLayers[0] as FeatureLayer;
+            if (_featureLayer != null)
+            {
+                QueryStateFeature3(_featureLayer, sQueryFieldName, stateName);
+            }
+        }
+
+        private async Task QueryStateFeature3(FeatureLayer _featureLayer, string sQueryFieldName, string stateName)
+        {
+            try
+            {
+                QueryParameters pQueryP = new QueryParameters();
+                string sformat = stateName.Trim().ToUpper();
+                pQueryP.WhereClause = "upper(" + sQueryFieldName + ") LIKE '%" + sformat + "%'";
+                await _featureLayer.SelectFeaturesAsync(pQueryP, Esri.ArcGISRuntime.Mapping.SelectionMode.New);
+                FeatureQueryResult pQueryResult = await _featureLayer.GetSelectedFeaturesAsync();
+                List<Feature> pListFeatures = pQueryResult.ToList();
+                EnvelopeBuilder pEnvBuilder = new EnvelopeBuilder(_featureLayer.SpatialReference);
+                for (int i = 0; i < pListFeatures.Count; i++)
+                {
+                    pEnvBuilder.UnionOf(pListFeatures[i].Geometry.Extent);
+                }
+
+                await MainMapView.SetViewpointGeometryAsync(pEnvBuilder.ToGeometry(), 50);
+            }
+            catch (Exception ex)
+            {
+                System.Windows.MessageBox.Show("【程序出错】" + ex.Message);
+            }
+        }
+
+        private async void FunClickQuery(MapPoint pPoint, FeatureLayer _featureLayer)
+        {
+            double tol = 3; //容差设为3像素
+            double mapTol = tol * MainMapView.UnitsPerPixel;
+            MapPoint pNormalPoint = pPoint;
+            if (MainMapView.IsWrapAroundEnabled)
+            {
+                pNormalPoint = (MapPoint)GeometryEngine.NormalizeCentralMeridian(pPoint);
+            }
+
+            Envelope selEnv = new Envelope(pNormalPoint.X - mapTol, pNormalPoint.Y - mapTol, pNormalPoint.X + mapTol,
+                pNormalPoint.Y + mapTol, MainMapView.SpatialReference);
+            QueryParameters pQueryPara = new QueryParameters();
+            pQueryPara.Geometry = selEnv;
+            pQueryPara.SpatialRelationship = SpatialRelationship.Intersects;
+            await _featureLayer.SelectFeaturesAsync(pQueryPara, Esri.ArcGISRuntime.Mapping.SelectionMode.New);
+            
+            FeatureQueryResult pQueryResult = await _featureLayer.GetSelectedFeaturesAsync();
+            List<Feature> pListFeatures = pQueryResult.ToList();
+            if (pListFeatures.Count <= 0)
+            {
+                return;
+            }
+            EnvelopeBuilder pEnvBuilder = new EnvelopeBuilder(_featureLayer.SpatialReference);
+            for (int i = 0; i < pListFeatures.Count; i++)
+            {
+                pEnvBuilder.UnionOf(pListFeatures[i].Geometry.Extent);
+            }
+            await MainMapView.SetViewpointGeometryAsync(pEnvBuilder.ToGeometry(), 50);
+            Feature pFeature;
+            string sInfo = "";
+            IReadOnlyList<Field> pFields = pQueryResult.Fields;
+            for (int i = 0; i < pListFeatures.Count; i++)
+            {
+                pFeature = pListFeatures[i];
+                IDictionary<string,object> FeatureAttri = pFeature.Attributes;
+                string str;
+                object obj;
+                sInfo += "选中的第" + i.ToString() + "个要素的属性\n\r";
+                for (int j = 0; j < FeatureAttri.Count; j++)
+                {
+                    str = FeatureAttri.Keys.ElementAt(j);
+                    obj = FeatureAttri.Values.ElementAt(j);
+                    sInfo += str + ":" + obj.ToString() + "\r\n";
+                }
+                MessageBox.Show(sInfo);
+            }
+        }
+
+        private async void FunIndentifyQuery(System.Windows.Point pPoint, FeatureLayer pFLayer)
+        {
+            IdentifyLayerResult identifyLayerResult = await MainMapView.IdentifyLayerAsync(pFLayer,pPoint,20,false);
+            if (!identifyLayerResult.GeoElements.Any())
+            {
+                return;
+            }
+            Feature identifyFeature = (Feature)identifyLayerResult.GeoElements.First();
+            IDictionary<string,object> FeatureAttri = identifyFeature.Attributes;
+            string str;
+            string tempStr = "";
+            object obj;
+            for (int i = 0; i < FeatureAttri.Count; i++)
+            {
+                str = FeatureAttri.Keys.ElementAt(i);
+                obj = FeatureAttri.Values.ElementAt(i);
+                tempStr += str + ":" + obj.ToString() + "\r\n";
+            }
+            System.Windows.MessageBox.Show(tempStr);
+        }
+
+        private void Menu_Click_Indentify_OnClick(object sender, RoutedEventArgs e)
+        {
+            m_CurOper = CURRENTOPERATION.SelectQuery;
+        }
+
+        private void Menu_Identify_Indentify_OnClick(object sender, RoutedEventArgs e)
+        {
+            m_CurOper = CURRENTOPERATION.IdentifyQuery;
         }
     }
-}
+}