public IActionResult UploadEditLetterCharts(string pageBaseId, int id, int letterChartsPageNumber)
        {
            Guid   PageBaseId = Guid.Parse(pageBaseId);
            string message    = "";
            bool   result     = false;


            try
            {
                long   size       = 0;
                var    files      = Request.Form.Files;
                string ServerPath = "";

                foreach (var file in files)
                {
                    var filename = ContentDispositionHeaderValue
                                   .Parse(file.ContentDisposition)
                                   .FileName
                                   .Trim('"');
                    var editfilename = filename.Replace("zip", "htm");
                    ServerPath = "/pageletterchart/" + editfilename;
                    filename   = _webHostEnvironment.WebRootPath + "\\pageletterchart" + $@"\{filename}";

                    var filePath = _webHostEnvironment.WebRootPath + "\\pageletterchart";
                    size += file.Length;

                    string startPath   = filePath;
                    string zipPath     = filePath + "\\" + file.FileName;
                    string extractPath = filePath;

                    using (FileStream fs = System.IO.File.Create(filename))
                    {
                        file.CopyTo(fs);
                        fs.Flush();
                    }
                    ZipFile.ExtractToDirectory(zipPath, extractPath, true);
                }

                LetterChart lC = _context.LetterCharts.Where(C => C.Id == id).FirstOrDefault();


                lC.ServerPath = ServerPath;

                _context.LetterCharts.Update(lC);

                _context.SaveChanges();
                result = true;
            }
            catch (Exception)
            {
                message = "عملیات ذخیره با شکست روبرو شد";
                result  = false;
            }

            return(Json(new { result = result, message = message }));
        }
 // GET: Letter
 public LetterController()
 {
     chart            = new LetterChart();
     chart2           = new LetterChart2();
     letterRepository = new EfLetterRepository();
 }