How can I access a page's content inside a frame?

Question

I have a frame inside mainwindow, inside it there\'s a page with panels and various contents. The mainwindow decides wich page to load, and then must interact with their content

Answer 1

OK. So first, I think you might be going about this the wrong way to start. Check out this project. http://www.wpfsharp.com/2011/04/05/navigation-and-pages-using-model-view-viewmodel-mvvm/

Try this example:

MainWindow.xaml

MainWindow.xaml.cs

using System;
using System.Windows;
using System.Windows.Controls;

namespace Test
{
    /// 

    /// Interaction logic for MainWindow.xaml
    /// 
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            var a = MainFrame.Content as Page;
            var grid = a.Content as Grid;
            var textBlock = grid.Children[0];
            // bla bla, you logged in
            MainFrame.Source = new Uri("/Home.xaml", UriKind.Relative);
            var b = MainFrame.Content as Page; // Still Login.xaml
            MainFrame.ContentRendered +=MainFrame_ContentRendered;
        }

        private void MainFrame_ContentRendered(object sender, EventArgs e)
        {
            var b = MainFrame.Content as Page; // Is now Home.xaml
        }
    }
}

Login.xaml

    
        This is a sample login page.