Called just before a page is no longer the active page in a frame.
Assembly: System.Windows.Controls.Navigation (in System.Windows.Controls.Navigation.dll)
'Declaration Protected Overridable Sub OnNavigatingFrom ( _ e As NavigatingCancelEventArgs _ )
- Type: System.Windows.Navigation.NavigatingCancelEventArgs
An object that contains the event data.
You override the method to perform any actions on the page just before it becomes inactive.
Typically, you can use the method instead of creating an event handler for the Navigating event. Using the method is preferable because you do not have to remove the event handler from the NavigationService object to avoid object lifetime issues.
The following example shows how to override the method and use the NavigatingCancelEventArgs object to determine if a child window is displayed.
Partial Public Class About Inherits Page Public Sub New() InitializeComponent() End Sub Protected Overrides Sub OnNavigatingFrom(ByVal e As System.Windows.Navigation.NavigatingCancelEventArgs) If (e.Uri.ToString().Contains("/Home")) Then Dim surveyChildWindow As New SurveyWindow surveyChildWindow.Show() End If MyBase.OnNavigatingFrom(e) End Sub End Class
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.