NavigationService.Navigate Method (Uri, Object)


Navigate asynchronously to source content located at a uniform resource identifier (URI), and pass an object that contains data to be used for processing during navigation.

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

Public Function Navigate (
	source As Uri,
	navigationState As Object
) As Boolean


Type: System.Uri

A Uri object initialized with the URI for the desired content.

Type: System.Object

An object that contains data to be used for processing during navigation.

Return Value

Type: System.Boolean

true if a navigation is not canceled; otherwise, false.

Since navigations are asynchronous, it is possible for multiple navigations to be in progress at the same time. For example, if there are two child frames on a single page, both frames could be navigating. In this case, the various navigation events that are raised by NavigationService may be raised multiple times, one for each piece of content that is being navigated to, and not necessarily in order that the navigations were requested. Consequently, if a particular navigation request needs to process data that is specific to the individual request, it cannot use data that is available to all navigation requests. Instead, you can use navigationState to pass data for navigation processing that is specific to one navigation request.

The following event arguments provide access to navigation state:

The following example demonstrates navigating to a URI and passing navigation state.

Private Sub goButton_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
    Me.NavigationService.Navigate(New Uri(Me.addressTextBox.Text), Date.Now)
End Sub
Private Sub NavigationService_LoadCompleted(ByVal sender As Object, ByVal e As NavigationEventArgs)
    Dim requestDateTime As Date = CDate(e.ExtraData)
    Dim msg As String = String.Format("Request started {0}" & vbLf & "Request completed {1}", requestDateTime, Date.Now)
End Sub

.NET Framework
Available since 3.0
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