ArcEngine判断要素（feature）是否为multipart feature及分解（炸开）代码

转自原文 ArcEngine判断要素（feature）是否为multipart feature及分解（炸开）代码

#region 校验合法性
ArrayList pFeatureArray = null;
pFeatureArray = Application.Editor.FeatureSelection();
int count=pFeatureArray.Count;
if (count<)
{
    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 = ;
    for (int i = ; 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 > )
        {
            multipartcount++;
            for (int k = ; 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();
            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 == )
    {
        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();
}