Question

我有一个在系统托盘图标中连续运行的应用程序。它通过运行一些使用@Global互斥锁的代码来确保它是我的应用程序的唯一运行实例。

由于第三方供应商的限制，我可以与供应商应用程序的一部分集成的唯一（理智）方法是在配置文件中指定调用任意命令行可执行文件。我关心的参数会自动添加到我指定的可执行文件中。

所以我认为大多数与之集成的人运行一个单独的程序，它连接到主程序上的服务器套接字并发送一个数据包，让主程序知道命令行已被触发。

我想知道是否有办法可以做这个伪代码..

    static void Main(string[] args)
    {
        if (isrunningcommandLine)
        {
            ConnectToAlreadyRunningProcessAndPassInfo(args); // find already running process by its process name and somehow pass the command line params
            KillProgram();
        }
        else
        {
            CheckGlobalMutexAndStart();
        }
    }

基本上，如果我通过命令行运行连接到已经运行的全局进程并传递一些数据。

我控制的是客户端和服务器的代码，它们实际上是同一个项目。

Answer 1

您可以使用全局命名的互斥锁来检测您的应用是否已在运行。

如果否运行将接收和管理命令的服务器。
如果是运行客户端，只需将命令发送到服务器。

然后在localhost上使用TCP连接来交换消息。

    using System;
    using System.Net;
    using System.Net.Sockets;
    using System.Text;
    using System.Threading;

    namespace Test42
    {
        internal static class Program
        {
            private static int PORT = 1337;

            private static void Main()
            {
                bool ok;

                // Try to build a mutex.
                var mutex = new Mutex(true, @"Test42", out ok);

                // If build is ok, we run as a server. 
                // Otherwise, the server is already running, so we run as a client.
                if (ok)
                {
                    var server = new MyServer(PORT);
                    server.Start();
                }
                else
                {
                    var r = new Random();
                    var message = "Ho Hey : " + r.Next(50);

                    var client = new MyClient();
                    client.Send(PORT, message);
                }
            }
        }

        internal class MyClient
        {
            /// <summary>
            /// Send a message to localhost.
            /// </summary>
            /// <param name="port">The port to connect.</param>
            /// <param name="message">The message to send.</param>
            public void Send(int port, string message)
            {
                var client = new TcpClient();
                var serverEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), port);

                client.Connect(serverEndPoint);

                using (var stream = client.GetStream())
                {
                    var messageBuffer = Encoding.Unicode.GetBytes(message);
                    var lengthBuffer = BitConverter.GetBytes(messageBuffer.Length);

                    // Send message length.
                    stream.Write(lengthBuffer, 0, lengthBuffer.Length);

                    // Send message.
                    stream.Write(messageBuffer, 0, messageBuffer.Length);

                    stream.Flush();
                }

                client.Close();
            }
        }

        internal class MyServer
        {
            private readonly int _port;

            public MyServer(int port)
            {
                _port = port;
            }

            public void Start()
            {
                Console.WriteLine("wait for messages");
                var thread = new Thread(ThreadStart);
                thread.Start();
            }

            private void ThreadStart()
            {
                var listener = new TcpListener(IPAddress.Any, _port);
                listener.Start();
                while (true)
                {
                    var client = listener.AcceptTcpClient();
                    var clientThread = new Thread(ClientThreadStart);
                    clientThread.Start(client);
                }
            }

            private void ClientThreadStart(object obj)
            {
                var client = obj as TcpClient;
                if (client == null) return;

                using (var stream = client.GetStream())
                {
                    const int lengthLength = sizeof(int) / sizeof(byte);

                    // Read the message length.
                    var lengthBuffer = new byte[lengthLength];
                    stream.ReadAsync(lengthBuffer, 0, lengthLength).Wait();
                    var messageLength = BitConverter.ToInt32(lengthBuffer, 0);

                    // Read the message.
                    var messageBuffer = new byte[messageLength];
                    stream.ReadAsync(messageBuffer, 0, messageLength).Wait();
                    var message = Encoding.Unicode.GetString(messageBuffer);

                    Console.WriteLine("Client says: " + message);
                }

                client.Close();
            }
        }
    }

我可以在现有流程上执行代码吗？

1 个答案: