C# 无法使用c检索google文档中特定文件夹中的文档#

我正在尝试检索google文档中文件夹中的所有文档，使用下面的函数作为API文档中的give。。但该函数仍然返回所有文档的标题，而不仅仅是该特定文件夹的标题

public DocumentsFeed RetrieveDocsInFolder(DocumentsService service, string folder, string email)
        {
            AtomCategory folderCategory = new AtomCategory(folder,
            new AtomUri("http://schemas.google.com/docs/2007/folders/" + email));
            QueryCategory folderQueryCategory = new QueryCategory(folderCategory);
            DocumentsListQuery query = new DocumentsListQuery();
            query.Categories.Add(folderQueryCategory);
            query.CategoryQueriesAsParameter = true;
            return service.Query(query);
        }

---

请尝试以下代码：

public DocumentsFeed RetrieveDocsInFolder(DocumentsService service, string folder)
{
    string uri = String.Format(DocumentsListQuery.foldersUriTemplate, folder);
    DocumentsListQuery query = new DocumentsListQuery(uri);
    return service.Query(query);
}

我假设

folder

是要检索内容的文件夹的资源ID