public ActionResult Create(StaffSkill staffSkill)
 {
     if (ModelState.IsValid)
     {
         /*先保存员工技能固定的字段(为了生成主键Id)*/
         db.StaffSkills.Add(staffSkill);
         db.SaveChanges();
         /*查找员工技能预留字段(name)*/
         var fieldList = (from p in db.ReserveFields where p.TableName == "StaffSkills" select p).ToList();
         ViewBag.fieldList = fieldList;
         /*遍历,保存员工技能变化的字段*/
         foreach (var temp in fieldList) {
             StaffSkillReserve ssr = new StaffSkillReserve();
             ssr.Number=staffSkill.Id;
             ssr.FieldId=temp.Id;
             ssr.Value=Request[temp.FieldName];
             /*占位,为了在Index中显示整齐的格式*/
             if (ssr.Value == null) ssr.Value = " ";
             db.StaffSkillReserves.Add(ssr);
             db.SaveChanges();
         }
         return RedirectToAction("Index");
     }
     return View(staffSkill);
 }
        public ActionResult Edit(StaffSkill staffSkill)
        {
            if (ModelState.IsValid)
            {
                StaffSkill ss = db.StaffSkills.Find(staffSkill.Id);
                /*查找员工技能预留字段(value)*/
                var fieldValueList = (from ssr in db.StaffSkillReserves
                                      join rf in db.ReserveFields on ssr.FieldId equals rf.Id
                                      where ssr.Number == staffSkill.Id
                                      select new StaffSkillView { Id = ssr.Id, Description = rf.Description,Value=ssr.Value }).ToList();
                //ViewBag.fieldValueList = fieldValueList;
                /*给预留字段赋值*/
                foreach (var temp in fieldValueList) {
                    StaffSkillReserve ssr = db.StaffSkillReserves.Find(temp.Id);
                    ssr.Value = Request[temp.Description];
                    db.SaveChanges();
                }

                ss.StaffNumber = staffSkill.StaffNumber;
                ss.StaffName = staffSkill.StaffName;
                ss.SkillRemark = staffSkill.SkillRemark;
                ss.SkillNumber = staffSkill.SkillNumber;
                ss.SkillName = staffSkill.SkillName;
                ss.SkillGrade = staffSkill.SkillGrade;
                ss.BillType = staffSkill.BillType;
                ss.BillNumber = staffSkill.BillNumber;

                db.SaveChanges();
                return RedirectToAction("Index");
            }
            return View(staffSkill);
        }