CODEWITHSUNDEEP
c#wpf
Coffeeman
Coffeeman

Reputation: 295

How to remove form's NavigationService?

I've created a frame with a few pages. The frame has its own journal:

JournalOwnership="OwnsJournal"

When I pass 2 pages, I want to clean the frame NavigationService:

Frame parent_frame = (Frame)Application.Current.MainWindow.FindName("content_frame");

JournalEntry remove = parent_frame.RemoveBackEntry();

while (parent_frame.NavigationService.CanGoBack) {
    parent_frame.NavigationService.RemoveBackEntry();
    MessageBox.Show("Remove");
}

But after cleaning NavigationService I can go back.

Upvotes: 0

Views: 478

Answers (2)

Manoj Pedvi
Manoj Pedvi

Reputation: 169

The easiest way to do that is to handle the frame Navigated event:

frame.Navigated += frame_Navigated;

void frame_Navigated(object sender, NavigationEventArgs e)
{
    frame.NavigationService.RemoveBackEntry();
}

Upvotes: 1

Coffeeman
Coffeeman

Reputation: 295

I've removed all possible pages in NavigationService.BackStack and added event when I remove the last page.

Frame root = (Frame)Application.Current.MainWindow.FindName("content_frame");
int i = 0;

while (root.NavigationService.CanGoBack) {
    i++;
    root.NavigationService.RemoveBackEntry();
}
root.NavigationService.RemoveBackEntry();
MessageBox.Show("Deleted - " + i);


NavigatedEventHandler navigated_handle = null;
navigated_handle = (o, e) => {
    ((Frame)o).RemoveBackEntry();
    MessageBox.Show("Do and remove itself!");
    root.Navigated -= navigated_handle;
};
root.Navigated += navigated_handle;

Upvotes: 0

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