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Sharing resources between threads (ListBox)

shared resources; threads;

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#1 FrancoAti


    CC Regular

  • Member
  • PipPipPip
  • 32 posts

Posted 23 May 2015 - 02:06 PM

Whatsupp guys,a have a tcp server and when it receive a message from any client connected he should add a TextBlock in a ListBox but i receive the following error message:


The calling thread cannot access this object because a different thread owns it.


When i will change a text block status information and when i add any item in the list box.

The following code.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Net;
using System.Net.Sockets;
using System.Threading;

namespace ServerChat
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window

        private void escuta()

                Socket sd = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

                IPEndPoint ipe = new IPEndPoint(IPAddress.Any, 555);



                Socket txrx = sd.Accept();

                lock (status) {
                    status.Text = "Conectado a " + txrx.RemoteEndPoint.ToString();

                while (true)
                    byte[] buffer = new byte[1000];




            catch (Exception ex)


        public MainWindow()

        private void Button_Click(object sender, RoutedEventArgs e)
            new Thread(escuta).Start();


I know that theres a problem in WPF forms and access on it from threads,but i dont now how solve this.

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