NavigationView.BackRequested Ereignis

Definition

Namespace:

Windows.UI.Xaml.Controls

Tritt auf, wenn die Zurück-Schaltfläche eine Interaktion empfängt, z. B. ein Klick oder Tippen.

Entsprechende WinUI 2-API für UWP: Microsoft.UI.Xaml.Controls.NavigationView.BackRequested (informationen zu WinUI in der Windows App SDK finden Sie im Windows App SDK Namespaces).

// Register
event_token BackRequested(TypedEventHandler<NavigationView, NavigationViewBackRequestedEventArgs const&> const& handler) const;

// Revoke with event_token
void BackRequested(event_token const* cookie) const;

// Revoke with event_revoker
NavigationView::BackRequested_revoker BackRequested(auto_revoke_t, TypedEventHandler<NavigationView, NavigationViewBackRequestedEventArgs const&> const& handler) const;

public event TypedEventHandler<NavigationView,NavigationViewBackRequestedEventArgs> BackRequested;

function onBackRequested(eventArgs) { /* Your code */ }
navigationView.addEventListener("backrequested", onBackRequested);
navigationView.removeEventListener("backrequested", onBackRequested);
- or -
navigationView.onbackrequested = onBackRequested;

Public Custom Event BackRequested As TypedEventHandler(Of NavigationView, NavigationViewBackRequestedEventArgs) 

<NavigationView BackRequested="eventhandler" />

Ereignistyp

TypedEventHandler<NavigationView,NavigationViewBackRequestedEventArgs>

Windows-Anforderungen

Gerätefamilie	Windows 10, version 1803 (eingeführt in 10.0.17134.0)
API contract	Windows.Foundation.UniversalApiContract (eingeführt in v6.0)

Weitere Informationen

• NavigationViewBackRequestedEventArgs