INavigationAware.NavigatingFrom(NavigatingEventArgs) Method

Called automatically when an application attempts to navigate from a View that implements the INavigationAware interface.

Namespace: DevExpress.Xpf.WindowsUI.Navigation

Assembly: DevExpress.Xpf.Controls.v24.2.dll

NuGet Package: DevExpress.Wpf.Controls

Declaration

C#

void NavigatingFrom(
    NavigatingEventArgs e
)

VB.NET

Sub NavigatingFrom(
    e As NavigatingEventArgs
)

Parameters

Name	Type	Description
e	DevExpress.Xpf.WindowsUI.Navigation.NavigatingEventArgs	A NavigatingEventArgs object that contains event data.

Remarks

INavigationAware is the interface that provides navigation methods for WindowsUI applications. To use these methods implement the INavigationAware interface for your application screens (Views) as illustrated in the following code:

C#

public partial class MainView : UserControl, DevExpress.Xpf.WindowsUI.Navigation.INavigationAware {
     public MainView() {
         InitializeComponent();
         . . .
     }
 }

VB.NET

Public Partial Class MainView
     Inherits UserControl
     Implements DevExpress.Xpf.WindowsUI.Navigation.INavigationAware
     Public Sub New()
          InitializeComponent()
          ...
     End Sub
 End Class

After that, implement the INavigationAware methods for your View. To do so, right-click the INavigationAware in Visual Studio and select the ‘Implement Interface’ item from the pop-up menu.

Along with the NavigatingFrom method, the INavigationAware.NavigatedTo and INavigationAware.NavigatedFrom method will also be implemented. The INavigationAware.NavigatedFrom method is called if the NavigatingFrom method’s Cancel parameter does not equal true.

If you do not wish to implement the INavigationAware interface manually, use the NavigationPage object for your application screens instead of standard UserControl objects. See the Navigation topic to learn more.