private void bind()
        {
            User user = (User)Session["user"];

            TeacherBLL teachBll = new TeacherBLL();
            Teacher teacher = teachBll.getByUserId(user.Id);
            CommonBLL commonBll = new CommonBLL();
            // 根据教师ID得到课程信息
            string filter = "1=1";
            filter += weekId.SelectedIndex == 0 ? "" : " and week='" + weekId.SelectedValue + "'";
            DataTable dt = PageUtil.getProcessedDataTable(commonBll.getWorkAttendanceByTeachID(teacher.Id), filter);

            AspNetPager1.RecordCount = dt.Rows.Count;

            int from = (AspNetPager1.CurrentPageIndex - 1) * AspNetPager1.PageSize + 1;
            int to = from + AspNetPager1.PageSize - 1 > AspNetPager1.RecordCount ? AspNetPager1.RecordCount : from + AspNetPager1.PageSize - 1;

            GridView1.DataSource = PageUtil.getPaged(dt, from, to);
            GridView1.DataBind();
        }