/// <summary>
        /// 修改班级信息
        /// </summary>
        /// <param name="arg"></param>
        /// <returns></returns>
        public static int ModifyGroup(GroupClassInfo arg)
        {
            string sql =
                string.Format(
                    "update GroupClassTable set GroupName = '{0}', ClassTeacher = '{1}' where ID ={2}",
                    arg.GroupName, arg.ClassTeacher, arg.ID);

            return(SQLiteControl.ExecuteNonQuery(sql));
        }
        /// <summary>
        /// 创建班级
        /// </summary>
        /// <param name="arg"></param>
        /// <returns></returns>
        public static int CreateGroup(GroupClassInfo arg)
        {
            string sql =
                string.Format("insert into GroupClassTable values(NULL, '{0}', '{1}','{2}','{3}','{4}', 0)",
                              arg.GroupName, arg.CreatePerson, arg.CreateDate.ToString("yyyy-MM-dd"), arg.PersonID,
                              arg.ClassTeacher);

            return(SQLiteControl.ExecuteNonQuery(sql));
        }