public ActionResult Edit(int id = 0)
        {
            using (var db = new XkSystem.Models.DbContext())
            {
                var vm = new Models.ElectiveData.Edit();

                if (id != 0)
                {
                    var tb = (from p in db.Table <Entity.tbElectiveData>()
                              where p.Id == id
                              select new Dto.ElectiveData.Edit
                    {
                        Id = p.Id,
                        ElectiveOrgId = p.tbElectiveOrg.Id,
                        StudentId = p.tbStudent.Id,
                        IsFixed = p.IsFixed,
                        IsPreElective = p.IsPreElective
                    }).FirstOrDefault();
                    if (tb != null)
                    {
                        vm.ElectiveDataEdit = tb;
                    }
                }

                return(View(vm));
            }
        }
        public ActionResult Edit(Models.ElectiveData.Edit vm)
        {
            using (var db = new XkSystem.Models.DbContext())
            {
                var error = new List <string>();
                if (error.Count == decimal.Zero)
                {
                    if (vm.ElectiveDataEdit.Id == 0)
                    {
                        var tb = new Entity.tbElectiveData()
                        {
                            IsFixed       = vm.ElectiveDataEdit.IsFixed,
                            IsPreElective = vm.ElectiveDataEdit.IsPreElective,
                            tbElectiveOrg = db.Set <Entity.tbElectiveOrg>().Find(vm.ElectiveDataEdit.ElectiveOrgId),
                            tbStudent     = db.Set <Student.Entity.tbStudent>().Find(Code.Common.UserId),
                        };
                        db.Set <Entity.tbElectiveData>().Add(tb);
                        if (db.SaveChanges() > 0)
                        {
                            XkSystem.Areas.Sys.Controllers.SysUserLogController.Insert("添加了选课数据");
                        }
                    }
                    else
                    {
                        //var tb = (from p in db.Table<Entity.tbElectiveData>()
                        //          where p.Id == vm.ElectiveDataEdit.Id
                        //          select p).FirstOrDefault();
                        //if (tb != null)
                        //{
                        //    if (db.SaveChanges() > 0)
                        //    {
                        //        XkSystem.Areas.Sys.Controllers.SysUserLogController.Insert("修改了选课数据");
                        //    }
                        //}
                        //else
                        //{
                        //    error.AddError(Resources.LocalizedText.MsgNotFound);
                        //}
                    }
                }

                return(Code.MvcHelper.Post(error));
            }
        }