Arrow in LineSymbol WPF API

[foxfire]

Help please. I'm using ArcGis WPF API for paint schemes on the map. I need to draw lines with arrows. Is this possible and how to do it? For drawing I use ESRI.ArcGIS.Client.Draw.

[MichaelBranscomb]

Hi,

You could consider extending the Draw class - see this example: Custom Draw Tool‌

Cheers

Mike

[BrianLocke]

Pretty sure that I saw the new .net SDK come with an Arrow type?

[JenniferNery]

Hi,

I'm not sure if you simply want to update symbol template to include an arrow or if you wanted an arrow shape.

For custom symbols, you can try this SDK sample: ArcGIS API for Silverlight - Interactive Samples | ArcGIS for Developers  or symbol gallery: ArcGIS API for Silverlight - Symbol Gallery. Basically, you will need a LineSymbol and define a Control Template that includes an Arrow Shape.

If you want an arrow shape, you can try this SDK sample: ArcGIS API for Silverlight - Interactive Samples | ArcGIS for Developers click on the button with "Add an arrow" tooltip and then mouse down + drag + up to create this shape.

By default, this creates a Polygon but you can subscribe to DrawComplete and convert to Polyline.

        void Button_Click(object sender, RoutedEventArgs e)

        {

            var draw = new Draw(MyMap);

            draw.DrawMode = DrawMode.Arrow;

            draw.DrawComplete += draw_DrawComplete;

            draw.IsEnabled = true;

        }

        void draw_DrawComplete(object sender, DrawEventArgs e)

        {          

           ((Draw)sender).DrawComplete -= draw_DrawComplete;

            var polygon = (Polygon)e.Geometry;

            var polyline = new Polyline() { SpatialReference = polygon.SpatialReference };

            foreach (var r in polygon.Rings)

                polyline.Paths.Add(r);

            var layer = MyMap.Layers["MyLayer"] as GraphicsLayer;

            layer.Graphics.Add(new Graphic() { Geometry = polyline, Symbol = new SimpleLineSymbol() });           

        }