topic Measure Segments in ArcGIS API for Silverlight Questions

Measure Segments

PhilipThompson — Tue, 02 Aug 2011 14:24:44 GMT

Is it possible to report back segment lengths before calculating the entire length (or area)?

The DrawSurface_DrawComplete event gives the entire geometry.
DrawSurface_VertexAdded doesn't fire on the very first Map click.
DrawSurface_DrawBegin fires on the first Map click but doesn't give you that MapPoint.

Re: Measure Segments

PhilipThompson — Wed, 03 Aug 2011 08:21:10 GMT

This feels like a bug to me. DrawSurface_VertexAdded should fire after every Vertex is added.

Re: Measure Segments

JenniferNery — Wed, 03 Aug 2011 20:44:42 GMT

Thanks for your feedback. I have entered a work item for raising VertexAdded right after DrawBegin. We'll try to fix this bug in the future versions of the API.

If you need segment lengths, you can use MeasureAction http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#UtilityActions or write your own Measure tool using Draw.

Re: Measure Segments

PhilipThompson — Thu, 04 Aug 2011 07:55:04 GMT

Thanks Jennifer, knowing that VertexAdded not firing is recognized as a bug and will be fixed at a future release may be sufficient for my needs.

You mention "write your own Measure tool using Draw." I thought that's what I was doing - following the Utilities/Line Lengths sample but being hampered by the VertexAdded event not firing on the first map click. Did you mean something else?

Re: Measure Segments

ChrisTallman — Thu, 04 Aug 2011 11:43:46 GMT

Philip I'm in the same boat I thought I was writing my own measure tool but without a way to capture the first vertex I have not found a way to get a length of that first segment... Any ideas on a work around before the next API release would be helpful! The measure behavior isn't sufficient enough, if there was a way to capture the lengths from that utility it would be much more helpful. Maybe that's something that could be worked on also!

Chris

Thanks Jennifer, knowing that VertexAdded not firing is recognized as a bug and will be fixed at a future release may be sufficient for my needs.

You mention "write your own Measure tool using Draw." I thought that's what I was doing - following the Utilities/Line Lengths sample but being hampered by the VertexAdded event not firing on the first map click. Did you mean something else?