[Wpf]在C#中添加 collectionViewSource

Products = new ObservableCollection<Product>(products);

ProductOptions = new ObservableCollection<ProductOption>(options);

ProductsView = CollectionViewSource.GetDefaultView(Products);    ProductsView.GroupDescriptions.Add(new PropertyGroupDescription("Group"));
    ProductsView.SortDescriptions.Add(
        new SortDescription("Name", ListSortDirection.Ascending));
 
ProductOptionsView = CollectionViewSource.GetDefaultView(ProductOptions);    ProductOptionsView.SortDescriptions.Add(
        new SortDescription("Option", ListSortDirection.Ascending));
 
<ListBox Grid.Row="1" ItemsSource="{Binding Products}"
            DisplayMemberPath="Name">
    <ListBox.GroupStyle>
        <GroupStyle>
            <GroupStyle.HeaderTemplate>
                <DataTemplate>
                    <TextBlock Foreground="DarkGreen" Text="{Binding Name}"
                               FontStyle="Italic"/>
                </DataTemplate>
            </GroupStyle.HeaderTemplate>
        </GroupStyle>
    </ListBox.GroupStyle>