命名管道的示例

时间:2012-12-10 17:37:58

标签: c# ipc named-pipes

我如何编写一个简单的 - 最简单的工作 - 测试应用程序,说明如何使用IPC /命名管道?

例如,如何编写一个控制台应用程序,程序1将“Hello World”写入程序2,程序2接收消息并将“Roger That”回复给程序1。

4 个答案:

答案 0 :(得分:150)

using System;
using System.IO;
using System.IO.Pipes;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            StartServer();
            Task.Delay(1000).Wait();


            //Client
            var client = new NamedPipeClientStream("PipesOfPiece");
            client.Connect();
            StreamReader reader = new StreamReader(client);
            StreamWriter writer = new StreamWriter(client);

            while (true)
            {
                string input = Console.ReadLine();
                if (String.IsNullOrEmpty(input)) break;
                writer.WriteLine(input);
                writer.Flush();
                Console.WriteLine(reader.ReadLine());
            }
        }

        static void StartServer()
        {
            Task.Factory.StartNew(() =>
            {
                var server = new NamedPipeServerStream("PipesOfPiece");
                server.WaitForConnection();
                StreamReader reader = new StreamReader(server);
                StreamWriter writer = new StreamWriter(server);
                while (true)
                {
                    var line = reader.ReadLine();
                    writer.WriteLine(String.Join("", line.Reverse()));
                    writer.Flush();
                }
            });
        }
    }
}

答案 1 :(得分:20)

对于那些不熟悉IPC和命名管道的人,我发现以下NuGet包是一个很好的帮助。

GitHub: Named Pipe Wrapper for .NET 4.0

首先使用安装包:

var server = new NamedPipeServer<SomeClass>("MyServerPipe");
server.ClientConnected += delegate(NamedPipeConnection<SomeClass> conn)
    {
        Console.WriteLine("Client {0} is now connected!", conn.Id);
        conn.PushMessage(new SomeClass { Text: "Welcome!" });
    };

server.ClientMessage += delegate(NamedPipeConnection<SomeClass> conn, SomeClass message)
    {
        Console.WriteLine("Client {0} says: {1}", conn.Id, message.Text);
    };

server.Start();

然后是一个示例服务器(从链接复制):

var client = new NamedPipeClient<SomeClass>("MyServerPipe");
client.ServerMessage += delegate(NamedPipeConnection<SomeClass> conn, SomeClass message)
    {
        Console.WriteLine("Server says: {0}", message.Text);
    };

client.Start();

客户端示例:

grunt.cmd

对我而言最好的事情是,与此处接受的答案不同,它支持多个客户端与单个服务器通信。

答案 2 :(得分:11)

您实际上可以使用其名称btw。

写入命名管道

以管理员身份打开命令shell以绕过默认的“访问被拒绝”错误:

echo Hello > \\.\pipe\PipeName

答案 3 :(得分:1)

Linux上的FYI dotnet核心并不支持namedpipes,如果你在Linux上,请尝试使用tcplistener

此代码有一个客户端往返一个字节。

  • 客户端写字节
  • 服务器读取字节
  • 服务器写入字节
  • 客户端读取字节

DotNet Core 2.0 Server ConsoleApp

using System;
using System.IO.Pipes;
using System.Threading.Tasks;

namespace Server
{
    class Program
    {
        static void Main(string[] args)
        {
            var server = new NamedPipeServerStream("A", PipeDirection.InOut);
            server.WaitForConnection();

            for (int i =0; i < 10000; i++)
            {
                var b = new byte[1];
                server.Read(b, 0, 1); 
                Console.WriteLine("Read Byte:" + b[0]);
                server.Write(b, 0, 1);
            }
        }
    }
}

DotNet Core 2.0 Client ConsoleApp

using System;
using System.IO.Pipes;
using System.Threading.Tasks;

namespace Client
{
    class Program
    {
        public static int threadcounter = 1;
        public static NamedPipeClientStream client;

        static void Main(string[] args)
        {
            client = new NamedPipeClientStream(".", "A", PipeDirection.InOut, PipeOptions.Asynchronous);
            client.Connect();

            var t1 = new System.Threading.Thread(StartSend);
            var t2 = new System.Threading.Thread(StartSend);

            t1.Start();
            t2.Start(); 
        }

        public static void StartSend()
        {
            int thisThread = threadcounter;
            threadcounter++;

            StartReadingAsync(client);

            for (int i = 0; i < 10000; i++)
            {
                var buf = new byte[1];
                buf[0] = (byte)i;
                client.WriteAsync(buf, 0, 1);

                Console.WriteLine($@"Thread{thisThread} Wrote: {buf[0]}");
            }
        }

        public static async Task StartReadingAsync(NamedPipeClientStream pipe)
        {
            var bufferLength = 1; 
            byte[] pBuffer = new byte[bufferLength];

            await pipe.ReadAsync(pBuffer, 0, bufferLength).ContinueWith(async c =>
            {
                Console.WriteLine($@"read data {pBuffer[0]}");
                await StartReadingAsync(pipe); // read the next data <-- 
            });
        }
    }
}