Question

How to access textBlock from another xaml window?
I have the Main Page and there is the event handler xmppClient_OnMessage. I want to do something like this:

void xmppClient_OnMessage(object sender, MessageEventArgs e)
        {
            this.NavigationService.Navigate(new Uri("/message.xaml", UriKind.Relative));

            message.textBlock1.Text += e.Message.From + ": " + e.Message.Body;
        }

Answer 1

you can pass the data using query parameters just like in html.

 this.NavigationService.Navigate(new Uri("/message.xaml?messageid=1", UriKind.Relative));

and retrive it like this on next page

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
    if (this.NavigationContext.QueryString.ContainsKey("messageid"))
    {
        //your code here
    }

    base.OnNavigatedTo(e);
}