public ucHoaDonNhapHang()
 {
     InitializeComponent();
     _HoaDonNhapHang = new HoaDonNhapHangBUS();
     _HoaDonDatHang = new HoaDonDatHangBUS();
     _NhaCungCapBUS = new NhaCungCapBUS();
     _ChiTietHoaDonDatHangBUS = new ChiTietHoaDonDatHangBUS();
     _MatHangBUS = new MatHangBUS();
     tongtien = 0;
 }
 public ucHoaDonDatHang()
 {
     InitializeComponent();
     _NhaCungCapBUS      = new NhaCungCapBUS();
     _MatHangBUS         = new MatHangBUS();
     _HoaDonDatHangBUS   = new HoaDonDatHangBUS();
     _ChiTietHoaDonDatHangBUS = new ChiTietHoaDonDatHangBUS();
     _ThamSoBUS = new ThamSoBUS();
     ThamSo ts =new ThamSo();
     ts.TenThamSo = "SoSanPhamTonToiDaDeDatHang";
     QuyDinhSoSanPhamToiThieu = (int)Convert.ToDecimal(_ThamSoBUS.LayGiaTriThamSo(ts));
     leftselection   = -1;
     rightselection  = -1;
     tongtien        = 0;
     TenNhanVienLap  = StaticVariables.nhanVien.TenNhanVien;
 }