Latest Contributions by ThadTilton

Hi Jerome - The world cities in the sample-data folder are in geographic coordinates. Like most available basemaps, the OpenStreetMap data are in Web Mercator and shapefiles won't reproject to conform with a different coordinate system. To display the world-cities layer correctly, you can either: 1) add it to a map view that is in geographic coordinates (as the only layer, or with other WGS84 datasets, for example) or 2) reproject the shapefile into Web Mercator so it will overlay with most available basemaps. I used ArcMap to reproject the world-cities.shp dataset to Web Mercator and enclosed the result here. You should be able to add these data to your app and have them display correctly. Thad ... View more

Hi Ron - The problem is that elements inside the MapView are not contained in the Page's control hierarchy. If you set a data context for the Page (or Window) it won't be available on things like Map and Layer. Since those things don't inherit from FrameworkElement, they won't be able to use the data context of elements that "contain" them. If you define the data source explicitly with the binding, it should work as expected. Here's an example of binding a layer's ServiceUri to a property in a ViewModel. The ViewModel has been defined as a static resource in App.xaml. <esri:ArcGISTiledMapServiceLayer ID="Basemap" ServiceUri="{Binding Source={StaticResource myVM}, Path=BaseMapUri}"/> ... View more

Hi Mike - I gave this a try on my end, and experienced the same issue. I took a closer look and I think I've found the problem. Background: When you add a feature layer from a feature service, a local table is created for working with the features on the client. The user can make edits to this table and you can push those edits back up when you want to commit edits to the parent feature service. Attempting to add a new feature with M-values fails when calling FeatureTable.AddAsync. This is an edit to the table on the client. Without successfully making those edits, you can't push the edits to the service (FeatureTable.ApplyEditsAsync, ie). Cause: I cracked open the local (SqlLite) table and found that the shape field was not configured to use M values for feature coordinates. When looking at the traffic in Fiddler when the service is accessed (and used to create the local table), I can see the request for features does not include "returnM=true", so the features come back without those values. For display efficiency, it's better to exclude extra coordinate information for features (Z or M values, ie) if it's not needed. Unfortunately, there is no way to request that information be included when you need it. I've created an issue (bug) for this, and we can start to address it for a future release. The fix will likely include the ability to specify M or Z values be returned when you need them. By default, these values will probably continue to be excluded for performance reasons. Workaround: One way you can work around the problem is to make the edits directly to the feature service by sending a REST request straight to the service. The service expects features defined as JSON and fortunately, the Graphic class has "FromJson" and "ToJson" methods that greatly simplify that. After a feature is successfully added to the feature service, you can refresh your (local) ServiceFeatureTable to see the update on the client. If you need to manage a set of edits on the client and push them to the feature service later, you might use a GraphicsLayer locally to manage those edits. I've enclosed a project that uses a helper class ("RestRequest") to apply edits to the feature service and then refreshes the local table to see the edit. Give it a look when you have a chance, hopefully this will be a viable solution for you. Thad Tilton, Product Engineer, ArcGIS Runtime SDK for .NET ... View more

Hi Michael - One way to accomplish this would be to display the lines as graphics. Unlike other types of layers, a GraphicsOverlay (or GraphicsLayer) will allow you to assign individual symbols to each graphic (as opposed to assigning a renderer for the entire layer, ie). You could perform a hit test on the graphics (on MapViewTapped, eg.) and update the symbol (color) for the line that the user selects. Here's an example (including a button handler for creating the lines): XAML: <Grid> <esri:MapView x:Name="MyMapView" LayerLoaded="MyMapView_LayerLoaded">         <esri:MapView.GraphicsOverlays>             <esri:GraphicsOverlay ID="MyLineGraphics">                 <esri:GraphicsOverlay.Renderer>                     <esri:SimpleRenderer>                         <esri:SimpleLineSymbol Color="DarkGray" Width="2" Style="Dash"/>                     </esri:SimpleRenderer>                 </esri:GraphicsOverlay.Renderer>             </esri:GraphicsOverlay>         </esri:MapView.GraphicsOverlays>         <esri:Map>             <esri:ArcGISTiledMapServiceLayer ID="Basemap" ServiceUri="http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer"/> </esri:Map> </esri:MapView>     <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Top">                            <Button x:Name="AddLineButton"                 Content="Add Line ..."                                 Click="AddLineButton_Click"/>         <RadioButton Content="Red" IsChecked="True" Checked="RadioButton_Checked"/>         <RadioButton Content="Blue" Checked="RadioButton_Checked"/>         <RadioButton Content="Green" Checked="RadioButton_Checked"/>     </StackPanel> </Grid> Code behind (C#): public partial class MainWindow : Window {     private SimpleLineSymbol _lineSymbol;     public MainWindow()     {         InitializeComponent();         MyMapView.MapViewTapped += MyMapView_MapViewTapped;     }     // Do a hit test when the map view is tapped     // change the color of the selected graphic (polyline)     async void MyMapView_MapViewTapped(object sender, MapViewInputEventArgs e)     {         var graphicsOverlay = MyMapView.GraphicsOverlays["MyLineGraphics"];         var graphic = await graphicsOverlay.HitTestAsync(MyMapView, e.Position);         if (graphic != null)         {             // Line symbol color is controlled by a radio button choice             graphic.Symbol = _lineSymbol;         }     }     // Button click handler to add lines (with the default gray symbol)     private async void AddLineButton_Click(object sender, RoutedEventArgs e)     {         var newLine = await MyMapView.Editor.RequestShapeAsync(DrawShape.Polyline);         var newGraphic = new Graphic(newLine);         var graphicsOverlay = MyMapView.GraphicsOverlays["MyLineGraphics"];         graphicsOverlay.Graphics.Add(newGraphic);     }     // Radio button handler to determine the line color when a line is clicked     private void RadioButton_Checked(object sender, RoutedEventArgs e)     {         _lineSymbol = new SimpleLineSymbol             {                 Style = SimpleLineStyle.Solid,                 Width = 2             };         var rb = sender as RadioButton;         switch (rb.Content.ToString())         {             case "Red":                 _lineSymbol.Color = Colors.Red;                 break;             case "Green":                 _lineSymbol.Color = Colors.Green;                 break;             case "Blue":                 _lineSymbol.Color = Colors.Blue;                 break;             default:                 break;         }     } } ... View more