Como: Get the Return Value of a Page Function
This example shows how to get the result that is returned by a page function.
Exemplo
To get the result that is returned from a page function, you need to handle Return of the page function you are calling.
<Page x:Class="UsingPageFunctionsSample.CallingPage"
xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
Title="CallingPage"
>
<Hyperlink Name="callPageFunctionHyperlink" Click="callPageFunctionHyperlink_Click">Call Page Function</Hyperlink>
</Page>
Private Sub callPageFunctionAndReturnHyperlink_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
' Call a page function and hook up page function's return event to get result
Dim pageFunction As New GetStringPageFunction()
AddHandler pageFunction.Return, AddressOf GetStringPageFunction_Returned
Me.NavigationService.Navigate(pageFunction)
End Sub
Private Sub GetStringPageFunction_Returned(ByVal sender As Object, ByVal e As ReturnEventArgs(Of String))
' Get the result, if a result was passed.
If e.Result IsNot Nothing Then
Console.WriteLine(e.Result)
End If
End Sub
void callPageFunctionAndReturnHyperlink_Click(object sender, RoutedEventArgs e)
{
// Call a page function and hook up page function's return event to get result
GetStringPageFunction pageFunction = new GetStringPageFunction();
pageFunction.Return += new ReturnEventHandler<String>(GetStringPageFunction_Returned);
this.NavigationService.Navigate(pageFunction);
}
void GetStringPageFunction_Returned(object sender, ReturnEventArgs<String> e)
{
// Get the result, if a result was passed.
if (e.Result != null)
{
Console.WriteLine(e.Result);
}
}