Partilhar via

  • Artigo

NavigationService.GoForward Method

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Navigates to the most recent entry in the forward navigation history, or throws an exception if no entry exists in forward navigation.

Namespace:  System.Windows.Navigation
Assembly:  System.Windows.Controls.Navigation (in System.Windows.Controls.Navigation.dll)

Syntax

'Declaration
Public Sub GoForward

public void GoForward()

Exceptions

Exception Condition
InvalidOperationException

There are no entries in the forward navigation history.

Remarks

Before calling the GoForward method, check the value of the CanGoForward property to determine if an entry exists in the forward navigation history.

Examples

The following example shows buttons within a Silverlight page that allow forward and back navigation. The page uses the NavigationService property of the Page class to access the navigation service used by the hosting frame.

Private Sub BackNavButton_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
    If (NavigationService.CanGoBack) Then
        NavigationService.GoBack()
    End If
End Sub

Private Sub ForwardNavButton_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
    If (NavigationService.CanGoForward) Then
        NavigationService.GoForward()
    End If
End Sub

private void BackNavButton_Click(object sender, RoutedEventArgs e)
{
    if (NavigationService.CanGoBack)
    {
        NavigationService.GoBack();
    }
}

private void ForwardNavButton_Click(object sender, RoutedEventArgs e)
{
    if (NavigationService.CanGoForward)
    {
        NavigationService.GoForward();
    }
}

Version Information

Silverlight

Supported in: 5, 4, 3

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.