public async Task <IHttpActionResult> LargeFile() { HttpContext _context = HttpContext.Current; string root = _context.Server.MapPath("~/App_Data"); FileUploadHelper uploadFileService = new FileUploadHelper(root); try { UploadProcessingResult uploadResult = await uploadFileService.HandleRequest(Request); } catch (Exception ex) { return(Json(new { success = false, message = ex.Message, stack = ex.StackTrace })); } return(Json(new { success = true, message = "file uploaded successfully" })); }