Question

我现在正在尝试将信息从子进程（即管道）传递到其父进程，而该父进程只是一种形式。当它们是独立的而不是子进程时，我已经使命名管道在彼此之间工作，但是当我尝试使用pipeServer作为子进程时，它（子pipeserver进程）启动，然后关闭，我无法确定搞清楚为什么。即使将其重定向到调试，它也不会产生任何输出。

我的管道服务器应在从pipeClient收到3条消息后关闭。目前，它似乎是从调用开始，然后在等待接收管道客户端消息的自动关闭几秒钟。

感谢您的帮助和指导。

这是我的代码：

从调用流程的表单中

private void pipeB_Button_Click(object sender, EventArgs e)
        {
            using (Process process = new Process())
            {
                process.StartInfo.FileName = @"\\Mac\Home\Desktop\myPathName\TestNamedPipeB\TestNamedPipeB\bin\Debug\TestNamedPipeB.exe";
                process.StartInfo.UseShellExecute = false; // needed somehow
                //process.StartInfo.RedirectStandardInput = true;
                process.StartInfo.RedirectStandardOutput = true;
                process.StartInfo.RedirectStandardError = true;

                process.Start(); // this is where it is starting and closing.

                process.WaitForExit();

                StreamReader reader = process.StandardOutput; 
                string s = process.StandardOutput.ReadToEnd();
                Debug.WriteLine("s: " + s);

                string output = reader.ReadToEnd(); // used

                pipeConversation.Append(output);
                Debug.WriteLine("pipeConversation: " + pipeConversation.ToString());

            }
        }

我的服务器管道代码

namespace TestNamedPipeB
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.SetWindowSize(100, 15);

            StartServer();
        }
        static void StartServer()
        {
            
            var server = new NamedPipeServerStream("test-pipe");

            if (server.IsConnected == false)
            {
                Console.WriteLine("Currently waiting for a client to connect...");
            }

            server.WaitForConnection();
            
            StreamReader reader = new StreamReader(server);
            StreamWriter writer = new StreamWriter(server);

            Console.Write("A client has connected, awaiting greeting from client... \n");

            string emptyArgsString = "PipeA sent an empty message. PipeB (this program) is assuming pipeA has no arugments and is closing";

            int readerCounter = 0;
            int readerMaxInt = 3; // edit me to an int greather than 1 if you want to test

            while (readerCounter < readerMaxInt) 
            {
                var line = reader.ReadLine();
                if (line == null)
                {
                    Console.WriteLine(emptyArgsString);
                    Debug.WriteLine(emptyArgsString);
                    MessageBox.Show(emptyArgsString, "M3dida", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    break;
                }
                
                Console.WriteLine("PipeA said: " + line);
                Debug.WriteLine("PipeA said: " + line);
                readerCounter++;
                if (readerMaxInt > 1)
                {
                    writer.WriteLine(Console.ReadLine()); //<-- needed to send a response back if sending multiple messages
                    writer.Flush(); // onus changes to other pipe
                }
            }
        }
    }
}

Answer 1

因此，这可能是我遇到过的最严重的错误，它是如此肮脏，以至于它的金钱使锈迹斑斑。我也不是受过正式训练的程序员，所以方程式就是这样。

此行：Console.SetWindowSize(100, 15);导致了该错误。一旦将其从子进程中删除，一切都会恢复正常。我不知道为什么。

为什么我的子进程管道会自动关闭？

1 个答案: