private void txtGiamgia_TextChanged(object sender, EventArgs e) { txtThanhtien.Text = ThucthiSQL.Thanhtien(txtSoluong.Text, txtDongia.Text, txtGiamgia.Text); }
private void txtGiamgia_TextChanged(object sender, EventArgs e) { txtThanhtien.Text = ThucthiSQL.Thanhtien(txtSoluong.Text, txtDongia.Text, txtGiamgia.Text); }