Question

因此，在过去4天中，我已经使用TCPListener和TCPClient进行了测试。我已经轻松创建了一个独立的服务器/侦听器和一个独立的发件人/客户端。现在，我试图在一个应用程序中完成所有操作，但是当我尝试启动服务器时，整个应用程序将挂起。我不明白为什么它与我在不同应用程序中几乎一样的代码。

我尝试了它的多种变体并观看了多个教程，但是由于实际上我已经使用过相同的代码，所以我不知道发生了什么。

一旦我单击开始按钮触发StartButton_Click方法，就会发生问题

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.IO;

namespace ChatTest2
{
    public partial class Form1 : Form
    {
        private TcpClient client;
        public StreamReader STR;
        public StreamWriter STW;
        public string recieve;
        public String TextToSend;
        public Form1()

        {
            InitializeComponent();

            IPAddress[] localIP = Dns.GetHostAddresses(Dns.GetHostName());

            foreach (IPAddress address in localIP)
            {
                if (address.AddressFamily == AddressFamily.InterNetwork)
                {
                    ServerIPtextBox.Text = address.ToString();
                }
            }

        }

        private void StartButton_Click(object sender, EventArgs e)
        {
            TcpListener listener = new TcpListener(IPAddress.Any, int.Parse(ServerPorttextBox.Text));
            listener.Start();
            client = listener.AcceptTcpClient();
            STR = new StreamReader(client.GetStream());
            STW = new StreamWriter(client.GetStream());
            STW.AutoFlush = true;

            backgroundWorker1.RunWorkerAsync();
            backgroundWorker2.WorkerSupportsCancellation = true;

        }

        private void ConnectButton_Click(object sender, EventArgs e)
        {
            client = new TcpClient();
            IPEndPoint IpEnd = new IPEndPoint(IPAddress.Parse(ClientIPtextBox.Text), int.Parse(ClientPorttextBox.Text));

            try
            {
                client.Connect(IpEnd);

                if (client.Connected)
                {
                    ChatScreentextBox.AppendText("Connected to server" + "\n");
                    STW = new StreamWriter(client.GetStream());
                    STR = new StreamReader(client.GetStream());
                    STW.AutoFlush = true;
                    backgroundWorker1.RunWorkerAsync();
                    backgroundWorker2.WorkerSupportsCancellation = true;

                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message.ToString());
            }
        }

        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            while (client.Connected)
            {
                try
                {
                    recieve = STR.ReadLine();
                    this.ChatScreentextBox.Invoke(new MethodInvoker(delegate ()
                    {
                        ChatScreentextBox.AppendText("You:" + recieve + "\n");
                    }));
                    recieve = "";
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message.ToString());
                }
            }
        }

        private void backgroundWorker2_DoWork(object sender, DoWorkEventArgs e)
        {
            if (client.Connected)
            {
                STW.WriteLine(TextToSend);
                this.ChatScreentextBox.Invoke(new MethodInvoker(delegate ()
                {
                    ChatScreentextBox.AppendText("Me:" + TextToSend + "\n");
                }));
            }
            else
            {
                MessageBox.Show("Sending failed");
            }
            backgroundWorker2.CancelAsync();
        }

        private void SendButton_Click(object sender, EventArgs e)
        {
            if (MessagetextBox.Text != "")
            {
                TextToSend = MessagetextBox.Text;
                backgroundWorker2.RunWorkerAsync();
            }
            MessagetextBox.Text = "";

        }
    }
}

Answer 1

DSLContext

此行阻止了您的UI线程。

我会尝试使用async和await。

client = listener.AcceptTcpClient();

希望对您有帮助。

启动服务器会使我的应用程序挂起

1 个答案: