轉自原文 ArcEngine判斷要素（feature）是否為multipart feature及分解（炸開）代碼

#region 校驗合法性 ArrayList pFeatureArray = null; pFeatureArray = Application.Editor.FeatureSelection(); int count=pFeatureArray.Count; if (count<1) { MessageBox.Show("最少必須選擇1個要素才能進行要素分解！", "提示"); return; } #endregion try { //啟動編輯操作 Application.Editor.StartOperation(); #region 對選中的要素進行多部件測試及分解 int multipartcount = 0; for (int i = 0; i < count; i++) { IFeature pFeature = pFeatureArray as IFeature; if (pFeature.ShapeCopy.IsEmpty) continue; IGeometry pGeometry = pFeature.ShapeCopy; IGeometryCollection pGeocoll = pGeometry as IGeometryCollection; int geomcount = pGeocoll.GeometryCount; if (geomcount > 1) { multipartcount++; for (int k = 1; k < geomcount; k++) { IFeature newFeaturte = (pFeature.Class as IFeatureClass).CreateFeature(); IFeatureEdit pFeatureEdit = pFeature as IFeatureEdit; pFeatureEdit.SplitAttributes(newFeaturte); IGeometry newGeom = pGeocoll.get_Geometry(k); if (pFeature.ShapeCopy.GeometryType == esriGeometryType.esriGeometryPolygon) newGeom=GeometryHelper.ConstructPolygon(newGeom); else newGeom = GeometryHelper.ConstructPolyline(newGeom); newGeom.SpatialReference = pFeature.ShapeCopy.SpatialReference; newFeaturte.Shape = newGeom; newFeaturte.Store(); } IGeometry newGeom2 = pGeocoll.get_Geometry(0); if (pFeature.ShapeCopy.GeometryType == esriGeometryType.esriGeometryPolygon) newGeom2 = GeometryHelper.ConstructPolygon(newGeom2); else newGeom2 = GeometryHelper.ConstructPolyline(newGeom2); newGeom2.SpatialReference = pFeature.ShapeCopy.SpatialReference; pFeature.Shape = newGeom2; pFeature.Store(); Application.Editor.StopOperation("分解多部件要素"); } else { continue; } } if (multipartcount == 0) { MessageBox.Show("未選擇多部件要素！", "分解要素"); return; } #endregion } catch (Exception ex) { Application.Editor.AbortOperation(); MessageHelper.WriteLog("分解多部件要素", ex); } finally { Application.ActiveView.Refresh(); FlashFeatures(); }

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