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PageFunction<T>.Return Event

Occurs when a called PageFunction<T> returns, and can only be handled by the calling page.

Namespace:  System.Windows.Navigation
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

public event ReturnEventHandler<T> Return
<object Return="ReturnEventHandler"/>

A calling page detects when a called PageFunction<T> returns by handling Return. Additionally, the calling page can retrieve the PageFunction<T> return value from the Result property of the ReturnEventArgs<T> which is passed to the event handler.

The following example shows how to handle the Return event.

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;
}

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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