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POHow are we supposed to draw polylines on Here maps with Windows Phone 8?
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  1. POHow are we supposed to draw polylines on Here maps with Windows Phone 8?
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    copied!<p>I'm trying to draw a polyline on Here Maps, and can't find any tutorial or decent documentation on that subject.</p> <p>Here's what I've been doing up to now.</p> <p>I create my map directly in the view:</p> <pre><code>&lt;maps:Map x:Name="map2" Grid.Row="1" Margin="0,0,0,0" Loaded="HereMap_Loaded"/&gt; </code></pre> <p>When the map is available, it calls this code:</p> <pre><code>private void HereMap_Loaded(object sender, RoutedEventArgs e) { initData(); map2.Center = new GeoCoordinate(0, 0); map2.ZoomLevel = 13; map2.LandmarksEnabled = true; //Shows 3D buildings when available. draw(); } </code></pre> <p>The call to draw does this:</p> <pre><code>public void draw() { Microsoft.Phone.Maps.Controls.MapPolyline polyline = this.createPolylineFromArray(arrayOfGeoCoordinates); polyline.StrokeThickness = 12; polyline.StrokeColor = Color.FromArgb(255, 189, 179, 217); MapOverlay overlay = new MapOverlay { Content = polyline }; Microsoft.Phone.Maps.Controls.MapLayer layer = new Microsoft.Phone.Maps.Controls.MapLayer(); layer.Add(overlay); map2.Layers.Add(layer); } </code></pre> <p>And I create my polyline from a list of GeoCoordinates:</p> <pre><code>public Microsoft.Phone.Maps.Controls.MapPolyline createPolylineFromArray(List&lt;GeoCoordinate&gt; pArray) { if (pArray.Capacity &gt; 1) { GeoCoordinateCollection path = new GeoCoordinateCollection(); foreach (GeoCoordinate coordinate in pArray) { path.Add(coordinate); } Microsoft.Phone.Maps.Controls.MapPolyline polyline = new Microsoft.Phone.Maps.Controls.MapPolyline { Path = path }; return polyline; } return null; } </code></pre> <p>Now, I tried to create a circle overlay instead of a polyline before, and it worked. I've done it this way:</p> <pre><code>Content = new Ellipse { Fill = new SolidColorBrush(Colors.Red), Width = 40, Height = 40 } </code></pre> <p>When I replaced the circle overlay with the polyline as shown above, it displays the following picture:</p> <p><img src="https://i.stack.imgur.com/feWQI.png" alt="Polyline error"></p> <p>You perfectly see the map, and the overlay appears as a texte line at the upper edge of the screen, displaying the overlay class package name.</p> <p>What am I missing? I'm expecting it to display a polyline that will follow the map movements.</p>
 

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