/*更新学生信息实现*/
        public static bool EditStudent_(ENTITY.Student_ student_)
        {
            string sql = "update Student_ set studentName=@studentName,sex=@sex,classInfo=@classInfo,birthday=@birthday,zhengzhimianmao=@zhengzhimianmao,telephone=@telephone,address=@address where studentNumber=@studentNumber";

            /*构建sql参数信息*/
            SqlParameter[] parm = new SqlParameter[] {
                new SqlParameter("@studentName", SqlDbType.VarChar),
                new SqlParameter("@sex", SqlDbType.VarChar),
                new SqlParameter("@classInfo", SqlDbType.VarChar),
                new SqlParameter("@birthday", SqlDbType.DateTime),
                new SqlParameter("@zhengzhimianmao", SqlDbType.VarChar),
                new SqlParameter("@telephone", SqlDbType.VarChar),
                new SqlParameter("@address", SqlDbType.VarChar),
                new SqlParameter("@studentNumber", SqlDbType.VarChar)
            };
            /*为参数赋值*/
            parm[0].Value = student_.studentName;
            parm[1].Value = student_.sex;
            parm[2].Value = student_.classInfo;
            parm[3].Value = student_.birthday;
            parm[4].Value = student_.zhengzhimianmao;
            parm[5].Value = student_.telephone;
            parm[6].Value = student_.address;
            parm[7].Value = student_.studentNumber;
            /*执行更新*/
            return((DBHelp.ExecuteNonQuery(sql, parm) > 0) ? true : false);
        }
        /*添加学生信息实现*/
        public static bool AddStudent_(ENTITY.Student_ student_)
        {
            string sql = "insert into Student_(studentNumber,studentName,sex,classInfo,birthday,zhengzhimianmao,telephone,address) values(@studentNumber,@studentName,@sex,@classInfo,@birthday,@zhengzhimianmao,@telephone,@address)";

            /*构建sql参数*/
            SqlParameter[] parm = new SqlParameter[] {
                new SqlParameter("@studentNumber", SqlDbType.VarChar),
                new SqlParameter("@studentName", SqlDbType.VarChar),
                new SqlParameter("@sex", SqlDbType.VarChar),
                new SqlParameter("@classInfo", SqlDbType.VarChar),
                new SqlParameter("@birthday", SqlDbType.DateTime),
                new SqlParameter("@zhengzhimianmao", SqlDbType.VarChar),
                new SqlParameter("@telephone", SqlDbType.VarChar),
                new SqlParameter("@address", SqlDbType.VarChar)
            };
            /*给参数赋值*/
            parm[0].Value = student_.studentNumber;   //学号
            parm[1].Value = student_.studentName;     //学生姓名
            parm[2].Value = student_.sex;             //性别
            parm[3].Value = student_.classInfo;       //所在班级
            parm[4].Value = student_.birthday;        //出生日期
            parm[5].Value = student_.zhengzhimianmao; //政治面貌
            parm[6].Value = student_.telephone;       //联系电话
            parm[7].Value = student_.address;         //家庭地址

            /*执行sql进行添加*/
            return((DBHelp.ExecuteNonQuery(sql, parm) > 0) ? true : false);
        }
        /*根据studentNumber获取某条学生信息记录*/
        public static ENTITY.Student_ getSomeStudent_(string studentNumber)
        {
            /*构建查询sql*/
            string        sql      = "select * from Student_ where studentNumber='" + studentNumber + "'";
            SqlDataReader DataRead = DBHelp.ExecuteReader(sql, null);

            ENTITY.Student_ student_ = new ENTITY.Student_();
            /*如果查询存在记录,就包装到对象中返回*/
            if (DataRead.Read())
            {
                student_.studentNumber   = DataRead["studentNumber"].ToString();
                student_.studentName     = DataRead["studentName"].ToString();
                student_.sex             = DataRead["sex"].ToString();
                student_.classInfo       = DataRead["classInfo"].ToString();
                student_.birthday        = Convert.ToDateTime(DataRead["birthday"].ToString());
                student_.zhengzhimianmao = DataRead["zhengzhimianmao"].ToString();
                student_.telephone       = DataRead["telephone"].ToString();
                student_.address         = DataRead["address"].ToString();
            }
            return(student_);
        }