private void BtnHoaDon_Click(object sender, EventArgs e)
{
try
{
ExportToExcel excel = new ExportToExcel();
HoaDonBAL bal = new HoaDonBAL();
DataTable dt = bal.DTDS();
excel.ExportHoaDon(dt, "Hóa đơn", "Danh sách hóa đơn");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
