private void btnXoa_Click(object sender, EventArgs e)
{
KetNoi_CSDL.XoaDL_Khoa(txtMaKhoa.Text);
Load_Dulieu(null, null);
}
private void btnLuu_Click(object sender, EventArgs e)
{
KetNoi_CSDL.LuuDL_Khoa(txtMaKhoa.Text, txtTenKhoa.Text);
Load_Dulieu(null, null);
}
