C# WP8 Getting page URL adress with parameter

Question

I am trying to get a parameter from the URL but I am getting an error. Here is my code:

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);
        string str = "";
        if (NavigationContext.QueryString.TryGetValue("data", out str))
        {
            MessageBox.Show("k");
        }
    }


private void aktualizuj(object sender, DateTimeValueChangedEventArgs e)
{
        var btndate = sender as DatePicker;
        NavigationService.Navigate(new Uri("dieta.xaml?data=" + btndate.Value.Value.Date.ToString(),UriKind.Relative));
}

The error I am receiving is as follows:

    A first chance exception of type 'System.MissingMethodException' occurred in mscorlib.ni.dll
If there is a handler for this exception, the program may be safely continued.

Answer 1

Hmmm, looks like your debugger is getting quirky.

NavigationService.Navigate(new Uri("dieta.xaml?data=" +
    btndate.Value.Value.Date.ToString(),UriKind.Relative));

Should throw the exception:

Navigation is only supported to relative URIs that are fragments, or begin with '/', or which contain ';component/'. Parameter name: uri

So you should change it to

NavigationService.Navigate(new Uri("/dieta.xaml?data=" +
    btndate.Value.Value.Date.ToString(),UriKind.Relative));

If you're going to use UriKind.Relative