PageFunction<T>.Return Kejadian

Definisi

Ruang nama:

System.Windows.Navigation

Rakitan:

PresentationFramework.dll

Terjadi ketika yang disebut PageFunction<T> kembali, dan hanya dapat ditangani oleh halaman panggilan.

public:
 event System::Windows::Navigation::ReturnEventHandler<T> ^ Return;

public event System.Windows.Navigation.ReturnEventHandler<T> Return;

member this.Return : System.Windows.Navigation.ReturnEventHandler<'T> 

Public Custom Event Return As ReturnEventHandler(Of T) 

Jenis Acara

ReturnEventHandler<T>

Contoh

Contoh berikut menunjukkan cara menangani Return peristiwa.

void callPageFunctionButton_Click(object sender, RoutedEventArgs e)
{
    // Create page function object
    GetStringPageFunction pageFunction = new GetStringPageFunction();

    // Detect when page function returns
    pageFunction.Return += new ReturnEventHandler<String>(PageFunction_Return);

    // Call page function
    this.NavigationService.Navigate(pageFunction);
}

void PageFunction_Return(object sender, ReturnEventArgs<String> e)
{
    // Retrieve page function return value
    string returnValue = e.Result;
}

Private Sub callPageFunctionButton_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
    ' Create page function object
    Dim pageFunction As New GetStringPageFunction()

    ' Detect when page function returns
    AddHandler pageFunction.Return, AddressOf PageFunction_Return

    ' Call page function
    Me.NavigationService.Navigate(pageFunction)
End Sub

Private Sub PageFunction_Return(ByVal sender As Object, ByVal e As ReturnEventArgs(Of String))
    ' Retrieve page function return value
    Dim returnValue As String = e.Result
End Sub

Keterangan

Halaman panggilan mendeteksi kapan yang dipanggil PageFunction<T> kembali dengan menangani Return. Selain itu, halaman panggilan dapat mengambil PageFunction<T> nilai pengembalian dari Result properti ReturnEventArgs<T> yang diteruskan ke penanganan aktivitas.

Penggunaan Atribut XAML

<object Return="ReturnEventHandler"/>  

Lihat juga

• Start()
• RemoveFromJournal