private void toolStripButton2_Click(object sender, EventArgs e)
{
var qtht = bdsQTHT.Current as QTHT;
if (qtht != null)
{
var f = new frmQTHTChiTiet(qtht);
f.ShowDialog();
}
}
private void toolStripButton1_Click(object sender, EventArgs e)
{
frmQTHTChiTiet themqtht = new frmQTHTChiTiet();
themqtht.ShowDialog();
}