private void txtMaSP_TextChanged(object sender, EventArgs e)
{
if (SanPhamBUS.DanhSachSPTheoMa(txtMaSP.Text).Rows.Count > 0)
{
foreach (DataRow row in SanPhamBUS.DanhSachSPTheoMa(txtMaSP.Text).Rows)
{
txtTenSP.Text = row["TenSanPham"].ToString();
}
}
else
{
txtTenSP.ResetText();
txtSoLuong.ResetText();
}
}