AE遍历gdb的图层

可以使用IWorkspaceFactory接口打开gdb文件，然后使用IEnumDataset接口遍历其中的数据集，再使用IEnumFeatureClass接口遍历数据集中的要素类。代码示例如下：

public void TraverseGDBLayers(string gdbPath)
{
    IWorkspaceFactory workspaceFactory = new FileGDBWorkspaceFactoryClass();
    IWorkspace workspace = workspaceFactory.OpenFromFile(gdbPath, 0);
    IEnumDataset enumDataset = workspace.get_Datasets(esriDatasetType.esriDTAny);
    IDataset dataset = enumDataset.Next();
    while (dataset != null)
    {
        if (dataset is IFeatureDataset)
        {
            IEnumDataset enumSubDataset = dataset.Subsets;
            IDataset subDataset = enumSubDataset.Next();
            while (subDataset != null)
            {
                if (subDataset is IFeatureClass)
                {
                    IFeatureClass featureClass = subDataset as IFeatureClass;
                    // do something with the feature class
                }
                subDataset = enumSubDataset.Next();
            }
        }
        else if (dataset is IFeatureClass)
        {
            IFeatureClass featureClass = dataset as IFeatureClass;
            // do something with the feature class
        }
        dataset = enumDataset.Next();
    }
}