C#Arcengine通过坐标点生成面(环形)

来自：http://www.cnblogs.com/lee24789229/p/5481978.html

通过传入坐标点，返回几何图形，此代码部分可以生成环形面。 

方法一

        private IGeometry getGeometry(IPointCollection Points) { IPointCollection iPointCollection = new PolygonClass(); Ring ring = new RingClass(); object missing = Type.Missing; ring.AddPointCollection(Points); IGeometryCollection pointPolygon = new PolygonClass(); pointPolygon.AddGeometry(ring as IGeometry, ref missing, ref missing); IPolygon polyGonGeo = pointPolygon as IPolygon; //polyGonGeo.Close();  polyGonGeo.SimplifyPreserveFromTo(); return polyGonGeo as IGeometry; }

方法二：

        private IGeometry getGeometry1(IPointCollection Points) { //IPointCollection iPointCollection = new PolygonClass(); object pMissing = Type.Missing; //iPointCollection.AddPointCollection(Points);  IGeometryCollection pGeoColl = Points as IGeometryCollection; ISegmentCollection pRing = new RingClass(); pRing.AddSegmentCollection(pGeoColl as ISegmentCollection); object miss = Type.Missing; IGeometryCollection pPolygon = new PolygonClass(); pPolygon.AddGeometry(pRing as IGeometry, ref miss, ref miss); ITopologicalOperator topologicalOperator = pPolygon as ITopologicalOperator; topologicalOperator.Simplify(); return pPolygon as IGeometry; }