public List <Dictionary <string, object> > GetAllForminfo(string formid)
        {
            var pdffile = Path.Combine(pdfroot, formid + ".pdf");

            if (System.IO.File.Exists(pdffile))
            {
                var pdfDoc = new PdfParser(pdffile);
                return(pdfDoc.GetFieldsInfo());
            }
            else
            {
                return(null);
            }
        }
        public ActionResult <Stream> GetFile(string formid, int pageid)
        {
            //var configfile = Path.Combine(pdfroot,string.Format("{0}.{1}.json",formid,pageid));
            var db      = new DbHelper();
            var jsonObj = db.LoadFormData(formid, pageid);

            if (jsonObj.Count > 0)
            {
                var pdffile = Path.Combine(pdfroot, formid + ".pdf");
                var pdfDoc  = new PdfParser(pdffile);
                if (pageid > pdfDoc.GetPageNumber() || pageid < 1)
                {
                    return(null);
                }
                var newpdf      = Path.Combine(pdfroot, string.Format("{0}.{1}.pdf", formid, pageid));
                var downpdfname = string.Format("myform.{0}.{1}.pdf", formid, pageid);
                if (pdfDoc.PageToNewPdf(pageid, newpdf))
                {
                    var pdfDocForm = new PdfParser(newpdf);
                    if (pdfDocForm.GetFieldsInfo().Count < 1)
                    {
                        return(null);
                    }
                    // edit post content
                    pdfDocForm.SetFieldsValues(jsonObj, Path.Combine(pdfroot, downpdfname));
                    // edit finished
                }

                string localFilePath = Path.Combine(pdfroot, downpdfname);
                string fileName      = Path.GetFileName(localFilePath);
                //long fileSize = (new FileInfo(localFilePath)).Length;
                var dataBytes  = System.IO.File.ReadAllBytes(localFilePath);
                var dataStream = new MemoryStream(dataBytes);
                return(dataStream);

                // HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
                // response.Content = new StreamContent(dataStream);
                // response.Content.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("attachment");
                // response.Content.Headers.ContentDisposition.FileName = fileName;
                // response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");

                //return response;
            }
            else
            {
                return(null);
            }
        }