public Student SelectStudentByNum(string Num)
{
string sql = "select * from student where Num='" + Num + "'";
Student stu = facade.QueryFirst <Student>(sql, null);
return(stu);
}
public Teacher SelectTeacherByNum(string Num)
{
string sql = "select * from teacher where Num='" + Num + "'";
Teacher tch = facade.QueryFirst <Teacher>(sql, null);
return(tch);
}
