在 .NET SDK 中解析 PDF 以提取表单字段为 FDF

using Aspose.Pdf.Cloud.Sdk.Model;

namespace Parser
{
    public class ExportFormToFDF
    {
        public static async Task Extract(string documentName, string outputFdfName, 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]);
                }
                
                string fdfPath = Path.Combine(remoteFolder, outputFdfName);

                // Parse PDF to extract Form fields as FDF in cloud storage.
                AsposeResponse response = await pdfApi.PutExportFieldsFromPdfToFdfInStorageAsync(documentName, fdfPath, folder: remoteFolder);

                // Checks the response and logs the result.
                if (response == null)
                    Console.WriteLine("ExportFormToFDF(): Unexpected error!");
                else if (response.Code < 200 || response.Code > 299)
                    Console.WriteLine("ExportFormToFDF(): Failed to export Pdf document form fields.");
                else
                { // Downloads the updated file for local use.
                    Console.WriteLine("ExportFormToFDF(): Pdf document '{0}' form fields successfully exported to '{1} file.", documentName, outputFdfName);
                    Stream stream = pdfApi.DownloadFile(Path.Combine(remoteFolder, outputFdfName));
                    using var fileStream = File.Create(Path.Combine(localFolder, outputFdfName));
                    stream.Position = 0;
                    await stream.CopyToAsync(fileStream);
                    Console.WriteLine("ExportFormToFDF(): File '{0}' successfully downloaded.", outputFdfName);

                }
            }
        }
    }