private void butluuHD_Click(object sender, EventArgs e)
{
var HoaDon_BLL = new HoaDon_BLL();
string MaKH = comboBox1.SelectedValue.ToString();
string MaNV = cbnhanvien.SelectedValue.ToString();
datahoadon.DataSource = HoaDon_BLL.HoaDon_Insert(txtsoHD.Text, MaKH, MaNV, DateTime.Parse(dateTimePicker1.Value.ToString()), "Khó Quá", "Tiền Mặt");
datahoadon.DataSource = HoaDon_BLL.HoaDon_Select_Where(txtsoHD.Text);
foreach (DataRow dr in CTHD.Rows)
{
var CTHD_BLL = new CTHD_BLL();
dataCTHD.DataSource = CTHD_BLL.CTHD_Insert(txtsoHD.Text, dr[0].ToString(), int.Parse(txtsoluong.Text));
dataCTHD.DataSource = CTHD_BLL.CTHD_Select_Where(txtsoHD.Text);
}
CTHD.Clear();
CTHD_HOADON_Load(sender, e);
}