C# 做tcp串口助手接收不到数据

private void Listen()
{

try
{
while (tcplistener == true)
{
MessageBox.Show("098877");
while (s.Available > 0)
{
string sTemp;
byte[] byRead = new byte[s.Available];
s.Receive(byRead ,0,s.Available , SocketFlags.None);
sTemp = BitConverter.ToString(byRead ,0,byRead.Length );

textBox3.Text = sTemp;

}

}
}
catch (Exception)
{
MessageBox.Show("侦听失败");
}
}
这是接收的程序，请高手指点

最好是做成异步的。要不然你这做法控件线程可能没有时间去绘制。然后又被你给挂起来了。总的来说会把UI界面挂得很惨，
public void StartAgent(IPEndPoint AgentSvr_EP)
{
if (agent_svr != null) return;

agent_svr = new System.Net.Sockets.Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
if (agent_svr.IsBound == false)
{
agent_svr.Bind(AgentSvr_EP);
}//
agent_svr.IOControl(IOControlCode.KeepAliveValues, KeepAliveSetting(1, 5000, 5000), null);

ThreadPool.QueueUserWorkItem((agentRECV) =>
{
agent_svr.Listen(1);
while (true)
{
agent = agent_svr.Accept();

while (true)
{
try
{
byte[] buffer = new byte[1024];
int len = agent.Receive(buffer);
if (len > 0)
{
byte[] DATA = (buffer.ToList<byte>().GetRange(0, len).ToArray());
if (Command_Requestion != null)
{
Command_Requestion(this, DATA);
}
}
Thread.Sleep(1);
}
catch
{
agent.Close();
agent.Dispose();
break;
}
}
}
});

}

C# 做tcp串口助手接收不到数据

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