/// <summary>
        ///  根据老师查询临时成绩对象
        /// </summary>
        /// <param name="tea">老师对象</param>
        /// <param name="theid">themeid</param>
        /// <returns></returns>
        public GradeTemp GetGradeTempByTeacher(Teacher tea, int theid)
        {
            GradeTemp g = new GradeTemp();
            IQueryable <GradeTemp> iq = gratDal.GetEntities(grat => grat.Theme.Theme_Id == theid && grat.Teacher.Tea_Id == tea.Tea_Id);

            foreach (var item in iq)
            {
                g = item;
            }
            return(g);
        }
 /// <summary>
 /// 修改临时成绩对象
 /// </summary>
 /// <param name="g"></param>
 /// <param name="score"></param>
 public void ModifyGradeTemp(GradeTemp g, int score)
 {
     g.ScoreTemp = score;
     gratDal.UpdateEntity(g);
 }
 /// <summary>
 /// 添加一个临时成绩对象
 /// </summary>
 /// <param name="g"></param>
 public void AddGradeTemp(GradeTemp g)
 {
     gratDal.Add(g);
 }