NavigationViewItem.MenuItemsSource Propriété

public:
 property Platform::Object ^ MenuItemsSource { Platform::Object ^ get(); void set(Platform::Object ^ value); };

/// [get: Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallback(enable=true)]
/// [set: Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallback(enable=true)]
IInspectable MenuItemsSource();

void MenuItemsSource(IInspectable value);

/// [Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallback(enable=true)]
/// [get: Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallback(enable=true)]
/// [set: Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallback(enable=true)]
IInspectable MenuItemsSource();

void MenuItemsSource(IInspectable value);

public object MenuItemsSource { [Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallback(enable=true)] get; [Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallback(enable=true)] set; }

[Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallback(enable=true)]
public object MenuItemsSource { [Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallback(enable=true)] get; [Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallback(enable=true)] set; }

var object = navigationViewItem.menuItemsSource;
navigationViewItem.menuItemsSource = object;

Public Property MenuItemsSource As Object

<NavigationViewItem MenuItemsSource="{x:Bind Object}" .../>

Valeur de propriété

Source de l’objet qui contient les enfants de l’objet NavigationViewItem.

Attributs

Microsoft.UI.Xaml.CustomAttributes.MUXPropertyChangedCallbackAttribute

Exemples

Cet exemple montre comment ajouter une hiérarchie en définissant le modèle d’élément comme étant un Objet NavigationViewMenuItem, avec son contenu défini comme étiquette de l’élément de menu et sa propriété MenuItemsSource liée au niveau suivant de la hiérarchie.

<DataTemplate x:Key="NavigationViewMenuItem" x:DataType="local:Category">
    <NavigationViewItem Content="{x:Bind Name}" MenuItemsSource="{x:Bind Children}"/>
</DataTemplate>

<NavigationView x:Name="navview" 
    MenuItemsSource="{x:Bind categories, Mode=OneWay}" 
    MenuItemTemplate="{StaticResource NavigationViewMenuItem}" 
    ItemInvoked="{x:Bind OnItemInvoked}" 
    Expanding="OnItemExpanding" 
    Collapsed="OnItemCollapsed" 
    PaneDisplayMode="Left">

    <StackPanel Margin="10,10,0,0">
        <TextBlock Margin="0,10,0,0" x:Name="ExpandingItemLabel" Text="Last Expanding: N/A"/>
        <TextBlock x:Name="CollapsedItemLabel" Text="Last Collapsed: N/A"/>
    </StackPanel>    
</NavigationView>

public class Category
{
    public String Name { get; set; }
    public String Icon { get; set; }
    public ObservableCollection<Category> Children { get; set; }
}

public sealed partial class HierarchicalNavigationViewDataBinding : Page
{
    public HierarchicalNavigationViewDataBinding()
    {
        this.InitializeComponent();
    }  

    public ObservableCollection<Category> Categories = new ObservableCollection<Category>()
    {
        new Category(){
            Name = "Menu Item 1",
            Icon = "Icon",
            Children = new ObservableCollection<Category>() {
               new Category(){
                    Name = "Menu Item 2",
                    Icon = "Icon",
                    Children = new ObservableCollection<Category>() {
                        new Category() { 
                            Name  = "Menu Item 2", 
                            Icon = "Icon",
                            Children = new ObservableCollection<Category>() {
                                new Category() { Name  = "Menu Item 3", Icon = "Icon" },
                                new Category() { Name  = "Menu Item 4", Icon = "Icon" }
                            }
                        }
                    }
                }
            }
        },
        new Category(){
            Name = "Menu Item 5",
            Icon = "Icon",
            Children = new ObservableCollection<Category>() {
                new Category(){
                    Name = "Menu Item 6",
                    Icon = "Icon",
                    Children = new ObservableCollection<Category>() {
                        new Category() { Name  = "Menu Item 7", Icon = "Icon" },
                        new Category() { Name  = "Menu Item 8", Icon = "Icon" }
                    }
                }
            }
        },
        new Category(){ Name = "Menu Item 9", Icon = "Icon" }
    };

    private void OnItemInvoked(object sender, NavigationViewItemInvokedEventArgs e)
    {
        var clickedItem = e.InvokedItem;
        var clickedItemContainer = e.InvokedItemContainer;
    }

    private void OnItemExpanding(object sender, NavigationViewItemExpandingEventArgs e)
    {
        var nvib = e.ExpandingItemContainer;
        var name = "Last Expanding: " + nvib.Content.ToString();
        ExpandingItemLabel.Text = name;
    }

    private void OnItemCollapsed(object sender, NavigationViewItemCollapsedEventArgs e)
    {
        var nvib = e.CollapsedItemContainer;
        var name = "Last Collapsed: " + nvib.Content;
        CollapsedItemLabel.Text = name;
    }
}

public sealed class NavigationViewItemExpandingEventArgs
{
    public NavigationViewItemExpandingEventArgs() {}

    public object ExpandingItem { get; }
    public NavigationViewItemBase ExpandedItemContainer { get; }
    public bool IsSettingsInvoked { get; }
    public NavigationTransitionInfo RecommendedNavigationTransitionInfo { get; }
}

public sealed class NavigationViewItemCollapsedEventArgs
{
    public NavigationViewItemCollapsedEventArgs() {}

    public object CollapsedItem { get; }
    public NavigationViewItemBase CollapsedItemContainer { get; }
    public bool IsSettingsInvoked { get; }
    public NavigationTransitionInfo RecommendedNavigationTransitionInfo { get; }
}

S’applique à