Latest Contributions by FreddieGibson

You'll want to use SpatialReference.create instead of new SpatialReference. Also, the spatial reference won't be set for the map until you set the extent of the map. Below is the logic I used on my end. public MainWindow() {     InitializeComponent();     MyMapView.LayerLoaded += (sender, args) =>     {         Debug.WriteLine(args.Layer);         Debug.WriteLine(args.LoadError);     };     MyMapView.ExtentChanged += (sender, args) => Debug.WriteLine(MyMapView.Extent);     MyMapView.Loaded += async (sender, args) =>     {         string srcPath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);         string mpkPath = Path.Combine(srcPath, @"data\MapPackage3857.mpk");         LocalMapService lms = new LocalMapService(mpkPath);         await lms.StartAsync();         ArcGISDynamicMapServiceLayer dmsLayer = new ArcGISDynamicMapServiceLayer(new Uri(lms.UrlMapService));         //ArcGISDynamicMapServiceLayer dmxLayer = new ArcGISDynamicMapServiceLayer(new Uri("http://services.arcgisonline.com/arcgis/rest/services/World_Topo_Map/MapServer"));         BackgroundGroupLayer grpLayer = new BackgroundGroupLayer();         //GroupLayer grpLayer = new GroupLayer();         grpLayer.ChildLayers.Add(dmsLayer);         Map map = new Map         {             SpatialReference = SpatialReference.Create(3857),             InitialViewpoint =                 new Viewpoint(new Envelope(-20037508, -12242956, 20037508, 12242956,                     SpatialReference.Create(3857)))         };                         //map.Layers.Add(dmxLayer);         map.Layers.Add(grpLayer);         MyMapView.Map = map;     }; } public class BackgroundGroupLayer : GroupLayer {              } ... View more

Have you tried extending the Editor class? I'm able to accomplish this with the logic shown below: public class MyEditor : Editor {     private VertexPosition _vertexPosition ;     public VertexPosition MyPosition { get { return this._vertexPosition; } set { this._vertexPosition = value; } }     public MyEditor()     {         _vertexPosition = null;     }     protected override Symbol OnGenerateSymbol(GenerateSymbolInfo generateSymbolInfo)     {         if (generateSymbolInfo.GenerateSymbolType == GenerateSymbolType.SelectedVertex)             _vertexPosition = generateSymbolInfo.VertexPosition;         return base.OnGenerateSymbol(generateSymbolInfo);     } } As a result of geometries being immutable I don't believe you would be able to modify an existing geometry's vertices. Instead, you should be able to use the builder to create a new line or polygon with your needed change. For example, I use this approach to move the vertices for polygons to the current gps location. I use the following line to get an array of the vertices for my selected polygon. var points = ((Polygon) EditGeometry).Parts[0].GetPoints().ToArray(); Once I have the array of points I then use the index of the selected vertex to manipulate this array prior to calling the PolygonBuilder and creating a new polygon with my needed geometry. ... View more