Lấy dấu trang từ PDF trong .NET SDK

    using Aspose.Pdf.Cloud.Sdk.Model;

    namespace Bookmarks
    {
        public class BookmarksExtract
        {
            public static async Task ShowInfo(string documentName, string localFolder, string remoteFolder)
            {
		// Get your AppSid and AppSecret from https://dashboard.aspose.cloud (free registration required). 
		pdfApi = new PdfApi(AppSecret, AppSid);

                using (var file = File.OpenRead(Path.Combine(localFolder, documentName)))
		{ // Upload the local PDF to cloud storage folder name.
                    FilesUploadResult uploadResponse = await pdfApi.UploadFileAsync(Path.Combine(remoteFolder, documentName), documentName);
                    Console.WriteLine(uploadResponse.Uploaded[0]);
                }

                // Extract bookmarks from the PDF on cloud storage.
                BookmarksResponse response = await pdfApi.GetDocumentBookmarksAsync(documentName, folder: remoteFolder);

                // Checks the response and logs the result.
                if (response == null)
                    Console.WriteLine("BookmarksExtract(): Unexpected error!");
                else if (response.Code < 200 || response.Code > 299)
                    Console.WriteLine("BookmarksExtract(): Failed to receive bookmarks from the document.");
                else if (response.Bookmarks == null || response.Bookmarks.List == null || response.Bookmarks.List.Count == 0)
                    Console.WriteLine("BookmarksExtract(): bookmarks not found in the document.");
                else
                {  // Show bookmarks from PDF documents
                    Console.WriteLine("BookmarksExtract(): all bookmarks successfully received from the document '{0}.", documentName);
                    foreach (Bookmark bookmark in response.Bookmarks.List) {
                        Console.WriteLine("BookmarksExtract(): ID = {0}", bookmark.Links[0].Href);
                        Console.WriteLine(bookmark.ToString());
                    }
                }
            }
        }
    }