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C# Foreach冻结表_C#_Foreach_Scripting - Fatal编程技术网

C# Foreach冻结表

C# Foreach冻结表,c#,foreach,scripting,C#,Foreach,Scripting,我知道每种冷冻形式都有很多东西,但我找不到解决问题的办法。我已经让这个程序的服务器部分工作了,我正在尝试使客户端连接到服务器时,这个代码将被执行txtConn.AppendText(“尝试连接”) 这是我的套接字连接代码 private static Socket ConnectSocket(string server, int port, RichTextBox txtConn, BackgroundWorker backgroundWorker1) { Socket

我知道每种冷冻形式都有很多东西,但我找不到解决问题的办法。我已经让这个程序的服务器部分工作了,我正在尝试使客户端连接到服务器时,这个代码将被执行
txtConn.AppendText(“尝试连接”)

这是我的套接字连接代码

private static Socket ConnectSocket(string server, int port, RichTextBox txtConn, BackgroundWorker backgroundWorker1)
    {
        Socket s = null;
        IPHostEntry hostEntry = null;

        // Get host related information.
        hostEntry = Dns.GetHostEntry(server);

        // Loop through the AddressList to obtain the supported AddressFamily. This is to avoid
        // an exception that occurs when the host IP Address is not compatible with the address family
        // (typical in the IPv6 case).
        backgroundWorker1.RunWorkerAsync();
        foreach (IPAddress address in hostEntry.AddressList)
        {
            IPEndPoint ipe = new IPEndPoint(address, port);
            Socket tempSocket =
                new Socket(address.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
            Console.WriteLine(ipe);
            try
            {
                attempt++;
                txtConn.Select(txtConn.TextLength, 0);
                txtConn.SelectionColor = Color.Aqua;
                if (attempt == 1)
                {
                    txtConn.AppendText("Attempting connection.");
                }
                else if (attempt > 1)
                {
                    txtConn.AppendText("\r" + "Attempting connection.");
                }
                txtConn.SelectionColor = txtConn.ForeColor;
                tempSocket.Connect(ipe);
            }
            catch (ArgumentNullException ane)
            {
                Console.WriteLine("ArgumentNullException : {0}", ane.ToString());
                txtConn.Select(txtConn.TextLength, 0);
                txtConn.SelectionColor = Color.Red;
                txtConn.AppendText("\r\n" + "Connection could not be established.");
                txtConn.SelectionColor = txtConn.ForeColor;
            }
            catch (SocketException se)
            {
                Console.WriteLine("SocketException : {0}", se.ToString());
                txtConn.Select(txtConn.TextLength, 0);
                txtConn.SelectionColor = Color.Red;
                txtConn.AppendText("\r\n" + "Connection could not be established.");
                txtConn.SelectionColor = txtConn.ForeColor;
            }
            catch (Exception e)
            {
                Console.WriteLine("Unexpected exception : {0}", e.ToString());
                txtConn.Select(txtConn.TextLength, 0);
                txtConn.SelectionColor = Color.Red;
                txtConn.AppendText("\r\n" + "Connection could not be established.");
                txtConn.SelectionColor = txtConn.ForeColor;
            }

            if (tempSocket.Connected)
            {
                Console.WriteLine("Connected");
                s = tempSocket;
                break;
            }
            else
            {
                continue;
            }
        }
        return s;
    }


当我运行程序并连接到错误的端口时,它会检查我计算机上所有可能的IP,并等待foreach语句后显示错误或任何内容。如何使其主动显示此内容?

您需要在不同的线程中运行代码,以便UI在执行时仍能更新

最简单的方法是将连接循环添加到线程池中的新任务中

ThreadPool.QueueUserWorkItem(i => {
    // Connection loop goes here.
});

如果需要,还可以使用任务、BackgroundWorker等。

使用应该使用
Socket
类中的
Async
方法,或者在另一个线程中运行这些东西。你也可以使用BackgroundWorker来做这件事。

我刚才回答了一个类似的问题,但为了针对你的具体情况展开讨论,看起来你实际上并没有使用backgroundWorker1。foreach应该在backgroundWorker1.DoWork事件引用的方法中完成。您还需要为backgroundWorker1.ProgressChanged事件创建一个方法。您可以使用ReportProgress传递字符串,然后将该消息附加到文本框:

从Worker_DoWork方法中的foreach循环中,您将报告进度,而不是直接更新RichTextBox:

worker.ReportProgress(0, "Connection could not be established.");
然后在Worker_ProgressChanged方法中,您将使用类似以下内容来更新RichTextBox:

txtConn.AppendText(e.UserState.ToString());

每种冷冻形式?你是说这个程序没有反应吗?听起来你需要仔细阅读
Thread
s。我知道你已经有了一个后台工作人员。它执行什么代码?为什么不将for循环放在后台work DoWork事件处理程序中?如何将字符串附加到richtextbox?在foreach循环中,您将使用消息调用worker.ReportProgress,而不是直接更新richtextbox。因此,在Worker_ProgressChanged方法中,您将执行类似于txtConn.AppendText(e.UserState.ToString())的操作。我会更新答案以反映这一点。谢谢你,这比其他任何事情都有帮助。谢谢你,蒂姆。