CEDTS_SystemOverview ICedts_NoticeRepository.GetSystemInfo()
        {
            var item = db.CEDTS_SystemOverview.FirstOrDefault();

            if (item == null)
            {
                CEDTS_SystemOverview so = new CEDTS_SystemOverview();
                so.Content          = string.Empty;
                so.Intro            = string.Empty;
                so.Time             = DateTime.Now;
                so.SystemOverviewID = 1;
                db.AddToCEDTS_SystemOverview(so);
                db.SaveChanges();
                item = so;
            }
            return(item);
        }
        void ICedts_NoticeRepository.EditSystem(string content, string intro)
        {
            var system = db.CEDTS_SystemOverview.FirstOrDefault();

            if (system != null)
            {
                var tempSystem = system;
                tempSystem.Content = content;
                tempSystem.Intro   = intro;
                tempSystem.Time    = DateTime.Now;
                db.ApplyCurrentValues(system.EntityKey.EntitySetName, tempSystem);
            }
            else
            {
                system         = new CEDTS_SystemOverview();
                system.Content = content;
                system.Intro   = intro;
                system.Time    = DateTime.Now;
                db.AddToCEDTS_SystemOverview(system);
            }
            db.SaveChanges();
        }