public void renewTD(timeData td)
        {
            timeData dbTD = selectTD(td.dataId);

            dbTD.ymd       = td.ymd;
            dbTD.dataId    = td.dataId;
            dbTD.startTime = td.startTime;
            dbTD.endTime   = td.endTime;
            dbTD.category  = td.category;
            dbTD.memo      = td.memo;
            db.SaveChanges();
        }
        public void add(timeData newTD, string userName, string startHour, string startMin, string endHour, string endMin)
        {
            if (getNewestTD(userName).Count == 0)
            {
                newTD.dataId    = userName + "0001";
                newTD.startTime = startHour + ":" + startMin;
                newTD.endTime   = endHour + ":" + endMin;
                db.timeDatas.Add(newTD);
                db.SaveChanges();
            }
            else
            {
                timeData qTd   = getNewestTD(userName).FirstOrDefault();
                int      count = Convert.ToInt32(qTd.dataId.Substring(userName.Length, 4));

                newTD.dataId    = userName + (count + 1).ToString().PadLeft(4, '0');
                newTD.startTime = startHour + ":" + startMin;
                newTD.endTime   = endHour + ":" + endMin;
                db.timeDatas.Add(newTD);
                db.SaveChanges();
            }
        }
 public void delete(timeData td)
 {
     db.timeDatas.Remove(td);
     db.SaveChanges();
 }