private void btn_htthem_Click(object sender, EventArgs e)
{
try
{
QLHS_DTO hs = new QLHS_DTO();
hs.MaKhoiLop = txt_makhoilop.Text;
hs.TenKhoiLop = txt_tenkhoilop.Text;
QLHS_BUS bus = new QLHS_BUS();
bus.ThemKhoiLop(hs);
MessageBox.Show("Thêm thành công khối lớp " + txt_tenkhoilop.Text + " !", "Thông báo");
LoadData();
btn_themkhoilop.Visible = true;
btn_capnhatkhoilop.Enabled = true;
btn_xoakhoilop.Enabled = true;
btn_htthem.Visible = false;
btn_themlop.Enabled = true;
btn_htcapnhat.Visible = false;
btn_htthem.Visible = false;
txt_makhoilop.Enabled = false;
txt_tenkhoilop.Enabled = false;
txt_makhoilop.DataBindings.Clear();
txt_makhoilop.DataBindings.Add("Text", dtgv_khoilop.DataSource, "MaKhoiLop");
txt_tenkhoilop.DataBindings.Clear();
txt_tenkhoilop.DataBindings.Add("Text", dtgv_khoilop.DataSource, "TenKhoiLop");
}
catch
{
MessageBox.Show("Đã tồn tại mã Khối!");
}
}