ArcGIS读取gdb内要素

 IWorkspaceFactory workspaceFactory = new FileGDBWorkspaceFactoryClass();
            IWorkspace workspace = workspaceFactory.OpenFromFile(@"F:/testData/test.gdb", 0);
            IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workspace;

            IFeatureDataset featureDataset = featureWorkspace.OpenFeatureDataset("topo");
            IFeatureClass cxghFC = featureWorkspace.OpenFeatureClass("cxghph");

            IFeatureClass tdlyFC = featureWorkspace.OpenFeatureClass("tdly");