protected void Page_Load(object sender, EventArgs e)
{
int mamon = int.Parse(Session["mamh"].ToString());
int malop = int.Parse(Session["tenlop"].ToString());
gridBangDiem.DataSource = gvDAL.GetXemDiemTheoMonHoc(malop, mamon);
gridBangDiem.DataBind();
lblmonhoc.Text = malop.ToString();
}