**Error: the calling thread cannot access this object because a different thread owns it
**
Zdjęcie aplikacji: https://scr.hu/2pdc/uqc1n
Buduje sobie komunikator na WPF na UDP.
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;
namespace tutek_socket_1
{
public partial class MainWindow : Window
{
Socket sck;
EndPoint epLocal, epRemote;
public MainWindow()
{
InitializeComponent();
sck = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
sck.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
textBox_IP1.Text = GetLocalIP();
textBox_IP2.Text = GetLocalIP();
}
private string GetLocalIP()
{
IPHostEntry host;
host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
{
return ip.ToString();
}
}
return "127.0.0.1";
}
private void button_Send_Click(object sender, RoutedEventArgs e)
{
try
{
System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
byte[] msg = new byte [1500];
msg = enc.GetBytes(textBox_Message.Text);
sck.Send(msg);
listBox_Message.Items.Add("You: " + textBox_Message.Text);
textBox_Message.Clear();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString() + "send but");
}
}
private void button_Start_Click(object sender, RoutedEventArgs e)
{
try
{
epLocal = new IPEndPoint(IPAddress.Parse(textBox_IP1.Text), Convert.ToInt32(textBox_host1.Text));
sck.Bind(epLocal);
epRemote = new IPEndPoint(IPAddress.Parse(textBox_IP2.Text), Convert.ToInt32(textBox_host2.Text));
sck.Connect(epRemote);
byte[] buffer = new byte[1500];
sck.BeginReceiveFrom(buffer, 0, buffer.Length, SocketFlags.None, ref epRemote, new AsyncCallback(MessageCallBack), buffer);
button_Start.Content = "Connected";
button_Start.IsEnabled = false;
button_Send.IsEnabled = true;
textBox_Message.Focus();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString() + "start but");
}
}
private void MessageCallBack(IAsyncResult aResult)
{
try
{
int size = sck.EndReceiveFrom(aResult, ref epRemote);
if (size > 0)
{
byte[] receivedData = new byte[1464];
receivedData = (byte[])(aResult.AsyncState);
ASCIIEncoding eEncoding = new ASCIIEncoding();
string receivedMessage = eEncoding.GetString(receivedData);
listBox_Message.Items.Add("Friend: "+receivedMessage);
}
byte[] buffer = new byte[1500];
sck.BeginReceiveFrom(buffer, 0, buffer.Length, SocketFlags.None, ref epRemote, new AsyncCallback(MessageCallBack), buffer);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
}
}
}
}
Łapie try catcha przy funkcjii private void MessageCallBack(IAsyncResult aResult), jak temu zaradzić?
Na Stacku piszą coś o:
this.Dispatcher.Invoke((Action)(() =>
{
...// your code here.
}));
Ale jak tego użyć i gdzie w kodzie? przypomina mi to delegat :>
Z góry proszę dziękuję za każdy post !