C#_TCPClient异步连接和接收消息

//c#不愧是全能型的语言，异步连线程都省了

class State
{

public byte[] bufferCache;

public TcpClient tcpClient;

}

...

private TcpClient tcpServer;

private TcpListener TCPListener;

TCPListener = new TcpListener(IPAddress.Parse(TCPIP), Convert.ToInt32(TCPPORT));

TCPListener.BeginAcceptTcpClient(new AsyncCallback(requestCallBack), TCPListener);

private void requestCallBack(IAsyncResult iar)
{

TcpListener listener = (TcpListener)iar.AsyncState;

tcpServer = listener.EndAcceptTcpClient(iar);

ConsoleUserColor.SetColorText(WhichWindow.LOGWindow, Color.Green, "连接成功!");

State state = new State();

state.tcpClient = tcpServer;

NetworkStream stream = tcpServer.GetStream();

if (stream.CanRead)

{

state.bufferCache = new byte[tcpServer.ReceiveBufferSize];

stream.BeginRead(state.bufferCache, 0, state.bufferCache.Length, new AsyncCallback(AsyncReadCallBack), state);

}

}

private void AsyncReadCallBack(IAsyncResult iar)//异步读取消息
{

State state = (State)iar.AsyncState;

if (state.tcpClient == null || !state.tcpClient.Connected)

return;

int ByteReads;

NetworkStream ns = state.tcpClient.GetStream();

ByteReads = ns.EndRead(iar);

if (ByteReads > 0)

{

string message = System.Text.Encoding.Default.GetString(state.bufferCache).Replace("\0", "");//得到消息

}

...