private void btnnext_Click(object sender, RoutedEventArgs e) { var db = this.FindResource("Caffein") as ViewModel.Caffein; int totalPage; if (db.TotalPage != 0) { if (db.CurPage < db.TotalPage) { db.CurPage = db.CurPage + 1; if (cmbdsnv.SelectedIndex == 0) { db.ViewNhanVien = nv.LayViewNV(db.CurPage, ViewModel.Caffein.PageSize, out totalPage); dataGrid.DataContext = db.ViewNhanVien; } if (cmbdsnv.SelectedIndex == 1) { db.ViewNhanVienXoa = nv.LayViewNVXoa(db.CurPage, ViewModel.Caffein.PageSize, out totalPage); dataGrid.DataContext = db.ViewNhanVienXoa; } if (cmbdsnv.SelectedIndex == 2) { db.ViewNhanVienAll = nv.LayViewNVAll(db.CurPage, ViewModel.Caffein.PageSize, out totalPage); dataGrid.DataContext = db.ViewNhanVienAll; } } else { MessageBox.Show("Đã là trang cuối!"); } } else { MessageBox.Show("Không có trang để thay đổi!"); } }