private void HienThiDSCTHDDatagrid()
{
List <CTHD_DTO> lstCTHD = CTHD_BLL.LayDSCTHD();
dataGridViewCTHD.DataSource = lstCTHD;
dataGridViewCTHD.Columns["SMaHD"].HeaderText = "Mã Hóa Đơn";
dataGridViewCTHD.Columns["SMaHang"].HeaderText = "Mã Hàng";
dataGridViewCTHD.Columns["SSoLuong"].HeaderText = "Số Lương";
dataGridViewCTHD.Columns["SDonGia"].HeaderText = "Đơn Giá Bán";
dataGridViewCTHD.Columns["SGiamGia"].HeaderText = "Giảm giá";
dataGridViewCTHD.Columns["SMaHD"].Width = 70;
dataGridViewCTHD.Columns["SMaHang"].Width = 100;
dataGridViewCTHD.Columns["SSoLuong"].Width = 100;
dataGridViewCTHD.Columns["SDonGia"].Width = 150;
dataGridViewCTHD.Columns["SGiamGia"].Width = 150;
}
private void btnLamLai_Click(object sender, EventArgs e)
{
List <CTHD_DTO> lstCTHD = CTHD_BLL.LayDSCTHD();
dataGridViewCTHD.DataSource = lstCTHD;
}