private void Form_HoaDon_Load(object sender, EventArgs e)
{
BUS_HoaDon hd = new BUS_HoaDon();
DataTable tbl = hd.DSMatHang();
dataGridView2.DataSource = tbl;
for (int i = 0; i < dataGridView2.Rows.Count; i++)
{
cmbList.Items.Add(dataGridView2.Rows[i].Cells["tenmathang"].Value.ToString());
}
CloseTextBox();
}
