private void btnTraCuuDiem_act_Click(object sender, EventArgs e) { groupBoxTraCuuTTDK.Visible = false; groupBoxTraCuuDiem.Visible = true; panelQT.Visible = false; panel_CapNhatSLLop.Visible = false; gbxCapNhatSLLop.Visible = false; panel_CapNhatSLSV_N.Visible = false; gbxCapNhatSLSV.Visible = false; panelThemDead.Visible = false; gbxThemDead.Visible = false; panel_CapNhatDead.Visible = false; gbxCapNhatDead.Visible = false; panel_KhaNang.Visible = false; gbxKhaNang.Visible = false; panel_TraCuuDiem.Visible = true; panelTraCuuTTDK.Visible = false; panelChinh.Visible = false; if (txtMaSV.Text == "") { BUSGiaoVien kq = new BUSGiaoVien(); DataTable dt = kq.LayKetQuaDiemKoSV(cbxMaCDDiem.Text); dataGridViewTraCuuDiem.DataSource = dt; } else { BUSGiaoVien kq = new BUSGiaoVien(); DataTable dt = kq.LayKetQuaDiem(txtMaSV.Text, cbxMaCDDiem.Text); dataGridViewTraCuuDiem.DataSource = dt; } }