Geodatabase - 打开要素类

 string dbPath = @"G:\doc\gis\1.400\data\pdb.mdb";
 ESRI.ArcGIS.Geodatabase.IWorkspaceFactory wsf = new ESRI.ArcGIS.DataSourcesGDB.AccessWorkspaceFactoryClass();
 ESRI.ArcGIS.Geodatabase.IWorkspace ws = wsf.OpenFromFile(dbPath, );
 ESRI.ArcGIS.Geodatabase.IEnumDataset eds = ws.get_Datasets(ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTAny);
 ESRI.ArcGIS.Geodatabase.IDataset ds = null;
 while ((ds = eds.Next()) != null) {
     //要素类.
     if (ds.Type == ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTFeatureClass)
         MessageBox.Show(ds.Name);
     //要素数据集.
     else if (ds.Type == ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTFeatureDataset) {
         ESRI.ArcGIS.Geodatabase.IEnumDataset subEDS = ds.Subsets;
         ESRI.ArcGIS.Geodatabase.IDataset sds;
         while ((sds = subEDS.Next()) != null) {
         MessageBox.Show("sub:" + sds.Name);
         }
     }
     else {

     }
 }