Pupli

1 – Using the query string
Navigating page:

page.NavigationService.Navigate(new Uri("/Views/Page.xaml?parameter=test", UriKind.Relative));

Destination page:

string parameter = string.Empty;
if (NavigationContext.QueryString.TryGetValue("parameter", out parameter)) {
    this.label.Text = parameter;
}

2 – Using NavigationEventArgs
Navigating page:

page.NavigationService.Navigate(new Uri("/Views/Page.xaml?parameter=test", UriKind.Relative));

// and ..

protected override void OnNavigatedFrom(NavigationEventArgs e)
{
    // NavigationEventArgs returns destination page
    Page destinationPage = e.Content as Page;
    if (destinationPage != null) {

        // Change property of destination page
        destinationPage.PublicProperty = "String or object..";
    }
}

Destination page:

// Just use the value of "PublicProperty"..

3 – Using Manual navigation
Navigating page:

page.NavigationService.Navigate(new Page("passing a string to the constructor"));

Destination page:

public Page(string value) {
    // Use the value in the constructor...
}

References
https://stackoverflow.com/questions/12444816/how-to-pass-values-parameters-between-xaml-pages

<Window x:Class="FrameSample.Window1"  
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
    Title="Window1" Height="300" Width="300">  
    <Grid>          
        <TextBlock>Outside area of frame</TextBlock>  
        <Frame Source="Page1.xaml">              
        </Frame>  
    </Grid>  
</Window>

navigate to a URI in a WPF Frame

<Window x:Class="FrameSample.Window1"  
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
    Title="Window1" Height="300" Width="300">  
    <Grid>  
        <TextBlock>Outside area of frame</TextBlock>  
        <Frame Name="FrameWithinGrid" >  
        </Frame>  
        <Button Height="23" Margin="114,12,25,0"   
                Name="button1" VerticalAlignment="Top" Click="button1_Click">Navigate to C# Corner  
        </Button>  
    </Grid>  
</Window>

private void button1_Click(object sender, RoutedEventArgs e)  
{  
    FrameWithinGrid.Navigate(new System.Uri("Page1.xaml",  
             UriKind.RelativeOrAbsolute));  
}

navigate to an external website URL and opens the ASPX page within a Frame

FrameWithinGrid.Source = new Uri("http://www.c-sharpcorner.com/Default.aspx", UriKind.Absolute);

this code first creates a NavigationWindow and then sets its Source to a URI

NavigationWindow window = new NavigationWindow();  
Uri source = new Uri("http://www.c-sharpcorner.com/Default.aspx", UriKind.Absolute);  
window.Source = source; window.Show();

private void NavigationViewItemHome_OnClick(object sender, RoutedEventArgs e)
{
    FrameMain.Navigate(new PageItems());
}

References
https://www.c-sharpcorner.com/UploadFile/mahesh/using-xaml-frame-in-wpf857/
https://www.youtube.com/watch?v=YoZcAx_0rNM