Silverlight Editing: Add Polygon to a feature layer

Question

I want to add the capability of adding a polygon to a layer in an ArcGIS server Silverlight application.  The only way I have found is using the editor toolkit.  It has a command "ADD" that I can bind to an icon and it allows to draw a polygon on the map.  What I want is to find out what commands this toolkit is based on and use them to send a set of points from another command or click event and get the polygon on the map through code.  I have seen some solutions out there (honestly only one) that does that which is a proof that this is doable.

Any suggestions?

Thanks in advance.

JenniferNery · Answer

Reading back to your question, I think what you want to do is AutoComplete against existing features? If yes, you can try this sample: http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#EditToolsExplicitSave. Check AutoSelect and AutoComplete, before you add a Polygon that will overlap existing features. After adding the feature, you will see by selecting (using Select) or moving it (using EditVertices), that it completed the draw against neighboring features.

The same properties AutoComplete and AutoSelect are available in EditorWidget and TemplatePicker.

OrlandoCarvajal · Answer

You should be able to use a Draw object with any shape to obtain a polygon or a rectangle, then add a Graphic object to the layer and save it. Something like this:
                graphic = new Graphic();
                graphic.Attributes.Add("USER", Application.Current.GetUserName());
                // Set other attributes
                ESRI.ArcGIS.Client.Geometry.Polygon poly = new ESRI.ArcGIS.Client.Geometry.Polygon();
                poly.Rings.Add(new ESRI.ArcGIS.Client.Geometry.PointCollection());
                poly.Rings[0].Add(new MapPoint(rect.XMin, rect.YMin));
                poly.Rings[0].Add(new MapPoint(rect.XMin, rect.YMax));
                poly.Rings[0].Add(new MapPoint(rect.XMax, rect.YMax));
                poly.Rings[0].Add(new MapPoint(rect.XMax, rect.YMin));
                graphic.Geometry = poly;
                featureLayer.Graphics.Add(graphic);
                featureLayer.SaveEdits();

Cheers

JenniferNery · Answer

Editor has EditorActivated and EditCompleted events, which you can use to do the additional operation you wish to do.

If you want these commands triggered in code-behind, you can do:
if(editor.Cut.CanExecute(null))
     editor.Cut.Execute(null); //where null is the Command parameter