private void Show()
 {
     DataLayer dl = new DataLayer();
     DataTable dt = dl.GetTimeTableDatabyGradeId(Request["grade_id"]);
     DataList1.DataSource = dt;
     DataList1.DataBind();
 }
 private void Show()
 {
     DataLayer dl = new DataLayer();
     DStudent dStudent = new DStudent((new Person()).people_id);
     string ID = dStudent.GradeID;
     DataTable dt = dl.GetTimeTableDatabyGradeId(ID);
     DataList1.DataSource = dt;
     DataList1.DataBind();
 }