private void LoadcmbHang()
        {
            LoaiXeControl lxctr = new LoaiXeControl();

            cbbHangXe.DataSource    = lxctr.GetData();
            cbbHangXe.DisplayMember = "HangXe";
            cbbHangXe.ValueMember   = "HangXe";
            cbbHangXe.SelectedIndex = 0;
        }
        private void LoadcmbNguonNhap()
        {
            LoaiXeControl lxctr = new LoaiXeControl();

            cbbNguonNhap.DataSource    = lxctr.GetData();
            cbbNguonNhap.DisplayMember = "NguonNhap";
            cbbNguonNhap.ValueMember   = "NguonNhap";
            cbbNguonNhap.SelectedIndex = 0;
        }
        private void LoadcmbPhanKhoi()
        {
            LoaiXeControl lxctr = new LoaiXeControl();

            cbbPhanKhoi.DataSource    = lxctr.GetData();
            cbbPhanKhoi.DisplayMember = "PhanKhoi";
            cbbPhanKhoi.ValueMember   = "PhanKhoi";
            cbbPhanKhoi.SelectedIndex = 0;
        }
        private void LoadcmbKhachHang()
        {
            LoaiXeControl lxctr = new LoaiXeControl();

            cbbLoaiXe.DataSource    = lxctr.GetData();
            cbbLoaiXe.DisplayMember = "TenThuongGoi";
            cbbLoaiXe.ValueMember   = "MaLX";
            cbbLoaiXe.SelectedIndex = 0;
        }