c# socket通信实例

服务器端

主要代码

csharp 复制代码

//服务器socket
private Socket serverSocket;
private void InitServerSocket()
{
    //创建终结点（EndPoint）
    IPAddress ip = IPAddress.Any;
    IPEndPoint ipe = new IPEndPoint(ip, 10030);

    //创建 socket 并开始监听
    serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    serverSocket.Bind(ipe);
    //开始监听
    serverSocket.Listen(10);

    //接受连接线程
    Task.Run(() =>
    {
        AcceptThread(serverSocket);
    });



}

private void AcceptThread(Socket serverSocket)
{
    while (true)
    {
        try
        {
            //接受到client连接，为此连接建立新的socket，并接受信息
            Socket tempSock = serverSocket.Accept();//为新建连接创建新的socket

            //用线程来处理通信
            Task.Run(() =>
            {
                //处理Accept后通信
                HandleAccept(tempSock);
            });
        }
        catch (Exception err)
        {
        }
    }
}

/// <summary>
/// 处理Socket服务器接收连接线程函数
/// </summary>
/// <param name="sock">服务器连接socket</param>
private void HandleAccept(Socket sock)
{
    while (true)
    {
        try
        {
            //如果连接断开，则退出线程
            //if (!sock.Connected)
            //{
            //    sock.Close();
            //    break;
            //}

            if (sock.Poll(-1, SelectMode.SelectRead))
            {
                //接收
                byte[] buffer = new byte[4096];
                int num = sock.Receive(buffer);

                if (num == 0)
                {
                    //连接断开了

                    sock.Close();
                    break;

                }

                //瘵缓冲区字节转换为字符串
                string sCmd = Encoding.UTF8.GetString(buffer, 0, num);

                //如果是空字符串，不处理
                if (sCmd.Trim() == "") continue;

                //命令包
                var cmd = JsonConvert.DeserializeObject<CmdPackage>(sCmd);

                //处理命令
                HandleCmd(sock, cmd);
            }


        }
        catch (Exception err)
        {
        }
    }
}

 /// <summary>
 /// 处理命令
 /// </summary>
 /// <param name="sock">服务器socket</param>
 /// <param name="cmd">命令包</param>
private void HandleCmd(Socket sock, CmdPackage cmd)
{
    if (cmd.Cmd == "Start")
    {
        //启动

        string ip = cmd.Parameters["ip"];
        info("Start,ip:" + ip);
        int ret = NrClientSDK.NrClientSDK_NewReader(ip);

        //开始标志
        startFlag = true;

        //返回包
        CmdPackage retCmd = new CmdPackage();
        retCmd.Cmd = "Return";
        retCmd.Parameters.Add("ret", ret.ToString());

        //发送
        var sRet = JsonConvert.SerializeObject(retCmd);
        byte[] ba = Encoding.UTF8.GetBytes(sRet);
        sock.Send(ba);
    }
}

CmdPackage 类

csharp 复制代码

class CmdPackage
    {
        public string Cmd { get; set; }
        public Dictionary<string, string> Parameters { get; set; }= new Dictionary<string, string>();
    }

客户端

csharp 复制代码

/// <summary>
/// 发送命令
/// </summary>
/// <param name="cmd">命令包对象</param>
/// <returns>接收到返回的字符串</returns>
private string SendCmd(CmdPackage cmd)
{
    IPAddress iP = IPAddress.Parse(serverIP);
    IPEndPoint iPEndPoint = new IPEndPoint(iP, serverPort);
    Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

    //创建与远程主机的连接
    clientSocket.Connect(iPEndPoint);

    //发送命令
    var sCmd = JsonConvert.SerializeObject(cmd);
    byte[] buffer = Encoding.UTF8.GetBytes(sCmd);
    clientSocket.Send(buffer);

    //接收返回
    byte[] bufRcv = new byte[4096];
    int num = clientSocket.Receive(bufRcv);

    //返回传为字符串
    string sRcv = Encoding.UTF8.GetString(bufRcv, 0, num);

    //关闭连接
    clientSocket.Close();

    //返回
    return sRcv;
}