public ActionResult Create(DataSubscriptions dataSubscriptions)
        {
            /**
             * 要注意的是:ModelState.IsValid的真假,是和model相关的,model中对属性的要求(非空、长度等等)必须和View中传过来一致
             * 如果model中定义某个属性非空,但是在View中绑定的model中压根没有这个属性的值,ModelState.IsValid一定是为假的!
             * */
            dataSubscriptions.BillCode = "9999999999";
            dataSubscriptions.BillType = "0008";
            dataSubscriptions.NextSendDate = DateTime.Now;
            if (ModelState.IsValid)
            {
                db.DataSubscriptions.Add(dataSubscriptions);
                db.SaveChanges();

                HttpPostedFileBase file = Request.Files["file"];
                if (file != null)
                {
                    string fileName = Path.Combine(Request.MapPath("~/files/tmp"), Path.GetFileName(file.FileName));
                    file.SaveAs(fileName);
                    using (ExcelPackage package = new ExcelPackage(new FileInfo(fileName)))
                    {
                        //注意!所有的起始位置都是1!所有的结束位置都是集合的元素长度值
                        ExcelWorksheet sheet = package.Workbook.Worksheets[1];

                        int colCount = sheet.Dimension.End.Column;
                        int rowCount = sheet.Dimension.End.Row;

                        for (ushort i = 2; i <= rowCount; i++)
                        {
                            BillStaffMapping mapping = new BillStaffMapping
                            {
                                BillType = dataSubscriptions.BillType,
                                BillNumber = dataSubscriptions.BillCode,
                                StaffNumber = sheet.GetValue(i,1).ToString(),    //从外部Excel表格获取员工工号
                                TelPhone = sheet.GetValue(i,3).ToString(),
                                Email = sheet.GetValue(i,4).ToString()
                            };
                            db.BillStaffMappings.Add(mapping);
                            db.SaveChanges();
                        }

                        if (!System.IO.File.Exists(fileName))
                            System.IO.File.Delete(fileName);
                    }
                }
            //    this.UploadFile(Request["Receiver"]);
                return RedirectToAction("Index");
            }

            return View(dataSubscriptions);
        }
 public ActionResult Edit(DataSubscriptions dataSubscriptions)
 {
     if (ModelState.IsValid)
     {
         db.Entry(dataSubscriptions).State = EntityState.Modified;
         db.SaveChanges();
         return RedirectToAction("Index");
     }
     return View(dataSubscriptions);
 }