[英]Client And Server Socket Connection using C#
我创建了两个项目,一个与客户端,另一个与服务器,以在两个项目之间交换文本;我在同一台计算机上运行这些exe。 我的客户端连接代码连接看起来:
using (SocketClient sa = new SocketClient(host, port))
{
sa.Connect();
Console.WriteLine(sa.SendReceive("Message #" + i.ToString()));
}
sa.Disconnect();
而socketclient是我的类,其中包含以下方法和构造函数:
internal SocketClient(String hostName, Int32 port)
{
IPHostEntry host = Dns.GetHostEntry(hostName);
IPAddress[] addressList = host.AddressList;
this.hostEndPoint = new IPEndPoint(addressList[addressList.Length - 1], port);
this.clientSocket = new Socket(this.hostEndPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
}
internal void Connect()
{
SocketAsyncEventArgs connectArgs = new SocketAsyncEventArgs();
connectArgs.UserToken = this.clientSocket;
connectArgs.RemoteEndPoint = this.hostEndPoint;
connectArgs.Completed += new EventHandler<SocketAsyncEventArgs>(OnConnect);
clientSocket.ConnectAsync(connectArgs);
autoConnectEvent.WaitOne();
SocketError errorCode = connectArgs.SocketError;
if (errorCode != SocketError.Success)
{
throw new SocketException((Int32)errorCode);
}
}
internal void Disconnect()
{
clientSocket.Disconnect(false);
}
private void OnConnect(object sender, SocketAsyncEventArgs e)
{
autoConnectEvent.Set();
this.connected = (e.SocketError == SocketError.Success);
}
internal String SendReceive(String message)
{
if (this.connected)
{
Byte[] sendBuffer = Encoding.ASCII.GetBytes(message);
SocketAsyncEventArgs completeArgs = new SocketAsyncEventArgs();
completeArgs.SetBuffer(sendBuffer, 0, sendBuffer.Length);
completeArgs.UserToken = this.clientSocket;
completeArgs.RemoteEndPoint = this.hostEndPoint;
completeArgs.Completed += new EventHandler<SocketAsyncEventArgs>(OnSend);
clientSocket.SendAsync(completeArgs);
AutoResetEvent.WaitAll(autoSendReceiveEvents);
return Encoding.ASCII.GetString(completeArgs.Buffer, completeArgs.Offset,completeArgs.BytesTransferred);
}
else
{
throw new SocketException((Int32)SocketError.NotConnected);
}
}
而在服务器端,代码如下所示:
SocketListener sl = new SocketListener(numConnections, bufferSize);
sl.Start(port);
Console.WriteLine("Server listening on port {0}.
Press any key to terminate the server process...", port);
Console.Read();
sl.Stop();
套接字侦听器是我的类,其中包含以下方法和构造函数:
internal SocketListener(Int32 numConnections, Int32 bufferSize)
{
this.numConnectedSockets = 0;
this.numConnections = numConnections;
this.bufferSize = bufferSize;
this.readWritePool = new SocketAsyncEventArgsPool(numConnections);
this.semaphoreAcceptedClients = new Semaphore(numConnections, numConnections);
for (Int32 i = 0; i < this.numConnections; i++)
{
SocketAsyncEventArgs readWriteEventArg = new SocketAsyncEventArgs();
readWriteEventArg.Completed += new EventHandler<SocketAsyncEventArgs> (OnIOCompleted);
readWriteEventArg.SetBuffer(new Byte[this.bufferSize], 0, this.bufferSize);
this.readWritePool.Push(readWriteEventArg);
}
}
internal void Start(Int32 port)
{
IPAddress[] addressList = Dns.GetHostEntry(Environment.MachineName).AddressList;
IPEndPoint localEndPoint = new IPEndPoint(addressList[addressList.Length - 1], port);
this.listenSocket = new Socket(localEndPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
this.listenSocket.ReceiveBufferSize = this.bufferSize;
this.listenSocket.SendBufferSize = this.bufferSize;
if (localEndPoint.AddressFamily == AddressFamily.InterNetworkV6)
{
this.listenSocket.SetSocketOption(SocketOptionLevel.IPv6, (SocketOptionName)27, false);
this.listenSocket.Bind(new IPEndPoint(IPAddress.IPv6Any, localEndPoint.Port));
}
else
{
this.listenSocket.Bind(localEndPoint);
}
this.listenSocket.Listen(this.numConnections);
this.StartAccept(null);
mutex.WaitOne();
}
我已经对路由器进行端口转发,因为服务器端exe没有端口转发就无法监听。
在家里的同一台PC和同一端口上发送和接收都可以正常工作。
当我尝试在我的办公计算机上运行这两个代码exe时,它将在以下行引发异常:
任何人都可以指导我什么问题以及如何解决吗?
谢谢
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