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从NetworkStream读取之前，我的程序冻结了

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你好，我是一名学生，我还不习惯c＃。我正在用服务器和客户机编写程序，它们通过套接字连接。我正在尝试使用while循环实现一种在数据可用时从流中读取的方法。如果在读取/写入流之前使用MessageBox.Show（）显示消息，则可以避免崩溃。我不知道为什么没有显示消息的程序无法正常工作... 

public partial class Form1 : Form
{
    const int port = 22222;
    const string ip = "127.0.0.1";
    IPAddress ipServer = IPAddress.Parse(ip);
    TcpListener server = null;
    TcpClient client = null;
    Thread thServer = null;
    Thread thClient = null;
    NetworkStream dataStream = null;
    const int a = 11;
    const int n = 251;
    string receivedMessage = "";
    bool? izbira = null;



    public Form1()
    {
        InitializeComponent();

        thServer = new Thread(new ThreadStart(startServer));
        thServer.IsBackground = true;
        thServer.Start();    
    }

    void startServer() {

        server = new TcpListener(ipServer,port);
        server.Start();
        textBox4.Invoke(new action(() => textBox4.AppendText("Strežnik: zagnan na: IP: " + ip + ",port:" + port)));
        client = new TcpClient();
        client = server.acceptTcpClient();
        NetworkStream dataStream = client.GetStream();
        textBox4.Invoke(new action(() => textBox4.AppendText(Environment.NewLine + "Strežnik: Sprejet nov uporabnik")));
        if (izbira == true)
        {
            byte[] message = new byte[1024];
            if(dataStream.DataAvailable)
                dataStream.Read(message,message.Length);
            receivedMessage = Encoding.UTF8.GetString(message);
            textBox4.Invoke(new action(() => textBox4.AppendText(Environment.NewLine + "Strežnik: Dobil sem sporočilo: " + receivedMessage)));

            message = new byte[1024];
            message = Encoding.UTF8.GetBytes("drugo sporocilo!");
            dataStream.Write(message,message.Length);
        }
        else {
            byte[] message = new byte[1024];
            message = Encoding.UTF8.GetBytes("serbus");
            dataStream.Write(message,message.Length);


        }

    }

    void button1_Click(object sender,EventArgs e) {
        if (izbira == null) {
            textBox4.Invoke(new action(() => textBox4.AppendText(Environment.NewLine + "Izbrati morate ali boste datoteko prenesli ali poslali!")));
            return;
        }
        this.button1.Enabled = false;
        client = new TcpClient();
        IPAddress insertedIp = IPAddress.Parse(textBox1.Text);

        client.Connect(insertedIp,Convert.ToInt32(textBox3.Text));
        dataStream = client.GetStream();


        if (izbira == true)
        {
            byte[] message = new byte[1024];
            message = Encoding.UTF8.GetBytes("hejj");

            dataStream.Write(message,message.Length);

            message = new byte[1024];

            MessageBox.Show("");
            while (true)
            {
                if (dataStream.DataAvailable)
                {

                    dataStream.Read(message,message.Length);
                    break;
                }
            }

            receivedMessage = Encoding.UTF8.GetString(message);
            textBox4.Invoke(new action(() => textBox4.AppendText(Environment.NewLine + "Strežnik: Dobil sem sporočilo: " + receivedMessage)));
        }
        else {

            byte[] message = new byte[1024];
            MessageBox.Show("Serbus");
            while (true)
            {
                if (dataStream.DataAvailable)
                {

                    dataStream.Read(message,message.Length);
                  break;
                }

            }
            receivedMessage = Encoding.UTF8.GetString(message);
            textBox4.Invoke(new action(() => textBox4.AppendText(Environment.NewLine + "Strežnik: Dobil sem sporočilo: " + receivedMessage)));
        }
    }

    void buttonUpload_Click(object sender,EventArgs e) {
        izbira = true;
        this.buttonDownload.Enabled = false;
    }
    void buttonDownload_Click(object sender,EventArgs e) {
        izbira = false;
        this.buttonUpload.Enabled = false;
        this.button2.Text = "Prenesi";
    }
wurui126 回答：从NetworkStream读取之前，我的程序冻结了

现在这主要是猜测，因为我们几乎没有足够的代码可以确定某些内容：

JiT编译器怎么样？

目的之一是死代码检测。它削减了它预计不会产生影响的代码。不幸的是，它仍然只是一个计算机程序，因此会发生误报。例如，尝试对x32 Framework安装强制实施OOM异常，我不得不竭尽全力以使 not 不能被JiT截断代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace OOM_32_forced
{
    class Program
    {
        static void Main(string[] args)
        {
            //each short is 2 byte big,Int32.MaxValue is 2^31.
            //So this will require a bit above 2^32 byte,or 2 GiB
            short[] Array = new short[Int32.MaxValue];

            /*need to actually access that array
            Otherwise JIT compiler and optimisations will just skip
            the array definition and creation */
            foreach (short value in Array)
                Console.WriteLine(value);
        }
    }
}

MessageBox将阻止整个功能被剪切为无效代码。向用户输出一些东西被假定为“具有效果”。但是，它的其他部分仍然有资格进行死代码检测。

很遗憾，您没有为我们提供一个简单完整的可验证示例。因此，我们真的无法帮助您进一步解决问题。

c#networkstreamtcp
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