public bool TestTreeSchema(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;
   }
   TopologicalTreeSchema treeSchema = new TopologicalTreeSchema();
   treeSchema.NodeSpacing = 20;
   treeSchema.LevelSpacing = 50;
   treeSchema.OutputDatasetName = datasource.Datasets.GetAvailableDatasetName("ResultSchema");
   treeSchema.OutputDatasource = datasource;
   DatasetVector resultDt = treeSchema.Build(datasetNet);
   // 树形拓扑图对象释放
   treeSchema.Dispose();
   return resultDt!=null;
}