ArcGIS Engine实现图层地物合并的简单方法

private IGeometry GetGeo(IFeatureLayer pFlyr)

        {

           IEnumGeometry pGeos = new EnumFeatureGeometryClass();

           IEnumGeometryBind pGeosBind = pGeos as IEnumGeometryBind;

           IFeatureSelection pflyrSelection = pFlyr as IFeatureSelection;

            pflyrSelection.SelectFeatures(null,esriSelectionResultEnum.esriSelectionResultNew, false);           pGeosBind.BindGeometrySource(null, pflyrSelection.SelectionSet);

           pGeos.Reset();

            IPolygonsPoly = new PolygonClass();

           ITopologicalOperator pTopo = sPoly as ITopologicalOperator;

           pTopo.ConstructUnion(pGeos);

           pTopo.Simplify();

            sPoly =pTopo as IPolygon;

           pflyrSelection.Clear();

            returnsPoly;

        }