topic Re: how get vertices of polygon? in ArcGIS API for Silverlight Questions

how get vertices of polygon?

StefhanCampos — Mon, 29 Nov 2010 18:58:23 GMT

hi,
how I can getting vertices from polygon?another question how i can convert or get
polylines from polygon?

ps:version 9.3 and api 1.2...but i can use 2.1

Re: how get vertices of polygon?

JenniferNery — Sat, 11 Dec 2021 14:15:12 GMT

To get the vertices of a polygon, you need to go through the Rings of the polygon where each Ring is a PointCollection and each collection is composed of MapPoints (vertices).

Something like:

PointCollection vertices = new PointCollection();
for (int i = 0; i < polygon.Rings.Count; i++)
 foreach (var mp in polygon.Rings)
  vertices.Add(mp);

To convert this to a polyline geometry, you need to create a Path for every Ring where each Ring and Path contain the same PointCollection.

Re: how get vertices of polygon?

dotMorten_esri — Sat, 11 Dec 2021 14:15:15 GMT

To convert polygon to polyline, just move the rings over to the paths:

 
Polyline line = new Polyline();
foreach(var ring in myPolygon.Rings)
    line.Paths.Add(ring);