PageFunction<T>.Return 事件

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) 

事件类型

示例

以下示例演示如何处理 Return 事件。

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

注解

调用页通过处理 Return来检测被调用PageFunction<T>的 何时返回。 此外，调用页可以从的 属性检索 PageFunction<T> 返回值 Result ，该属性 ReturnEventArgs<T> 将传递给事件处理程序。

XAML 属性用法

<object Return="ReturnEventHandler"/>

另请参阅

• Start()
• RemoveFromJournal