将连接的套接字保存在字典中

Question

我正在尝试将连接的套接字保存在字典中，这样我的API就不必每次都创建新的连接。我的问题是插座被丢弃了。因此，当我调用GetConnection((时，第二次socket.connected为false，并且是socket。可获得的消息是"；无法访问已释放的对象。对象名称：'System。网插座。插座&"；。

public static class ModbusSocket
{
private static Dictionary<IPAddress, Socket> socketList;

public static Socket GetConnection(string server, int port)
{
if (socketList is null)
{
socketList = new Dictionary<IPAddress, Socket>();
}
IPAddress iPAddress = IPAddress.Parse(server);
if (socketList.ContainsKey(iPAddress))
{
var socket = socketList[iPAddress];
if (socket.Connected)
{
return socket;
}
else
{
socketList.Remove(iPAddress);                    
socket = new Socket(iPAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ipe = new IPEndPoint(iPAddress, port);
socket.Connect(ipe);
socketList.Add(iPAddress, socket);
return socket;
}
}
else
{
Socket socket = new Socket(iPAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ipe = new IPEndPoint(iPAddress, port);
socket.Connect(ipe);
socketList.Add(iPAddress, socket);
return socket;
}
}
}

Answer 1

OMG我发现了问题。。。我调用它使用：

using (Socket s = ModbusSocket.GetConnection(hostIp, port))
{
var telegram = new Telegram();
telegram.Set(0, AddressConst.PositionWindow, 4);
var response = telegram.SendAndReceive(s);
var result = BitConverter.ToInt32(new byte[] { response.Byte19, response.Byte20, response.Byte21, response.Byte22 }, 0);
return result;
}