public bool TestHierarchicalSchema(Datasource datasource)
{
   if (datasource == null)
   {
       System.Console.WriteLine("数据源为空");
       return false;
   }
   String datasetName = "SrcNet";
   DatasetVector datasetNet = datasource.Datasets[datasetName] as DatasetVector;
   if (datasetNet == null)
   {
       System.Console.WriteLine("获取网络数据集失败");
       return false;
   }
   datasetNet.Open();
   Recordset recordset = datasetNet.GetRecordset(false, CursorType.Static);
   if (recordset == null)
   {
      System.Console.WriteLine("查询记录集失败");
       return false;
   }
   // 获取网络弧段标识信息
   String edgeIDField = datasetNet.GetFieldNameBySign(FieldSign.EdgeID);
   String fromNodeIDField = datasetNet.GetFieldNameBySign(FieldSign.FNode);
   String toNodeIDField = datasetNet.GetFieldNameBySign(FieldSign.TNode);
   NetworkEdgeID[] networkEdgeIDs = new NetworkEdgeID[recordset.RecordCount];
   int i=0;
   while (!recordset.IsEOF)
   {
       NetworkEdgeID networkEdgeID = new NetworkEdgeID();
       networkEdgeID.EdgeID = recordset.GetInt32(edgeIDField);
       networkEdgeID.FromNodeID = recordset.GetInt32(fromNodeIDField);
       networkEdgeID.ToNodeID = recordset.GetInt32(toNodeIDField);
       networkEdgeIDs[i++] = networkEdgeID;
       recordset.MoveNext();
   }
   recordset.Dispose();

   TopologicalHierarchicalSchema hierarchicalSchema = new TopologicalHierarchicalSchema();
   hierarchicalSchema.OutputDatasetName = datasource.Datasets.GetAvailableDatasetName("ResultSchema");
   hierarchicalSchema.OutputDatasource = datasource;
   DatasetVector resultDt = hierarchicalSchema.Build(networkEdgeIDs);
   // 等级拓扑图对象释放
   hierarchicalSchema.Dispose();
   return resultDt != null;
}