ArcStache.VectorCache.GetIdsOfContainedFeatureCentroids C# (CSharp) Метод

        private List<int> GetIdsOfContainedFeatureCentroids(IRecordSet recordset, IPolygon tilePolygon)
        {
            List<int> ids = new List<int>();
            IFeatureCursor cursor = recordset.get_Cursor(true) as IFeatureCursor;
            IFeature feature = cursor.NextFeature();
            if (feature == null)
            {
                return ids;
            }

            if (feature.ShapeCopy.GeometryType != esriGeometryType.esriGeometryMultipoint && feature.ShapeCopy.GeometryType != esriGeometryType.esriGeometryPolygon)
            {
                throw new ArgumentException("Only multipoint and polygon geometry types are supported by this method.");
            }

            this.tracePolygon(tilePolygon);

            IRelationalOperator2 relationalOperator = tilePolygon as IRelationalOperator2;

            try
            {
                // Envelope must contain centriod
                IPoint centroid = null;
                while (feature != null)
                {
                    centroid = (feature.ShapeCopy as IArea).Centroid;
                    if (relationalOperator.Contains(centroid))
                    {
                        this.tracePolygonContainsPoint(tilePolygon, centroid, feature.OID);
                        ids.Add(feature.OID);
                    }
                    feature = cursor.NextFeature();
                }
                if (ids.Count > 0)
                {
                    System.Diagnostics.Debug.WriteLine("OIDs with centroids contained:  " + ids.ToDelimitedString<int>(","));
                }
                return ids;
            }
            finally
            {
                this.ReleaseComObject(cursor);
                cursor = null;
            }
        }