How to convert IGeometry to IPolyline

[InsuHong1]

Hi,

I'm trying to convert IGeometry object to IPolyline. Specifically, IGeometry, that is polygon, and convert its boundary to IPolyline object.

I tried

   IPolyline plObject = (IPolyline)IGeometryobject;

but it was failed.



How can I do that?



Thanks.


Insu

[NeilClemmons · Accepted solution]

You can't cast a polygon to a polyline because they aren't the same thing.  You need to extract the polygon boundary.  You can do this via ITopologicalOperator.Boundary.

[InsuHong1]

Thanks. It works!!

Thank you. It's great help for me.