NavigationView.BackRequested 事件

定义

命名空间:

Microsoft.UI.Xaml.Controls

当后退按钮收到交互（如单击或点击）时发生。

// 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" />

事件类型

TypedEventHandler<NavigationView,NavigationViewBackRequestedEventArgs>

另请参阅

• NavigationViewBackRequestedEventArgs