private void ShowGrade()
{
Person person = new Person();
DTeacher dTeacher = new DTeacher(person.people_id);
DataTable dtGrade = dTeacher.GetMasterGradeList();
grade_id.DataTextField = "GradeFullName";
grade_id.DataValueField = "grade_id";
grade_id.DataSource = dtGrade;
grade_id.DataBind();
}
