#region 校验合法性
ArrayList pFeatureArray = null;
pFeatureArray = Application.Editor.FeatureSelection();
int count=pFeatureArray.Count;
if (count<1)
{  MessageBox.Show("最少必须选择1个要素才能进行要素分解！", "提示");  return;
}  #endregion
try
{  //启动编辑操作
    Application.Editor.StartOperation();  #region 对选中的要素进行多部件测试及分解  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("未选择多部件要素！", "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();
}