public DashboardWindow()
{
InitializeComponent();
Global.Books = SachBUS.loadAll();
Global.Categories = TheLoaiBUS.loadAllAndConvertToFillCombobox();
Global.BookCategories = TheLoaiBUS.loadAll();
Global.Customers = KhachHangBUS.loadAll();
KiemTraQuyDinh kt = QuyDinhBUS.loadKiemTraQuyDinh();
Global.ControlRules = kt;
var rules = QuyDinhBUS.loadQuyDinh();
Global.quyDinh = rules;
Global.BookBoughtBills = new List <ChiTietHoaDonBanSachDTO>();
}