关于socket的简单问题？

Question

代码:
(服务器端)
byte[] mybyte=new byte[1024];
try
{
                            
//get ip address
IPAddress ipaddr=IPAddress.Parse(ip); IPEndPoint localend=new IPEndPoint(ipaddr,int.Parse(port));
slistener=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp); //bind socket
slistener.Bind(localend);

//start listening
slistener.Listen(10); while(true)
            {
if(handler==null)
{
slistener.BeginAccept(new AsyncCallback(Acceptcallback),slistener);
socketevent.WaitOne();


}
else
{
socketevent.Reset();
handler.BeginReceive(buffer,0,buffer.Length,0,new AsyncCallback(ReceiveCallback),handler);
socketevent.WaitOne(); }



}
}
catch(SocketException my)
{
MessageBox.Show(my.Message.ToString(),"error",System.Windows.Forms.MessageBoxButtons.OK,System.Windows.Forms.MessageBoxIcon.Hand); }

Answer 1

（客户端）
string data=this.richTextBox1.Text.Trim();
string a=data+"<the end>";
byte []bytedata=System.Text.Encoding.Default.GetBytes(a);

////////////
try
{
if(!sclient.Connected)
{
sclient.BeginConnect(endpoint,new AsyncCallback(this.connectcallback),sclient);
socketdone.WaitOne();//阻塞线程
MessageBox.Show("connect is ok!");
}


//send data
sclient.BeginSend(bytedata,0,bytedata.Length,0,new AsyncCallback(this.sendcallback),sclient);
socketdone.WaitOne();//阻塞线程

//receive
sclient.BeginReceive(buffer,0,buffer.Length,0,new AsyncCallback(this.receivecallback),sclient);
socketdone.WaitOne();//阻塞线程
sclient.Shutdown(SocketShutdown.Both);
sclient.Close();

}
catch(Exception my)
{
               socketdone.Reset();
return; }
            
}
public void connectcallback(IAsyncResult ar)
{
try
{
Socket sclient=(Socket)ar.AsyncState;
sclient.EndConnect(ar);
socketdone.Set();
}
catch(Exception my)
{
                    MessageBox.Show(my.Message.ToString(),"connectcallback(client)");
   return; }

} public void sendcallback(IAsyncResult ar)
{
try
{
Socket sclient=(Socket)ar.AsyncState;
int bytesend=sclient.EndSend(ar);

socketdone.Set();
}
catch(Exception my)
{
MessageBox.Show(my.Message.ToString(),"sendcallback(client)");
                       return;
}
} public void receivecallback(IAsyncResult ar)
{
try
{
Socket sclient=(Socket)ar.AsyncState;

int bytereceive=sclient.EndReceive(ar);
  

box+=System.Text.Encoding.Default.GetString(buffer,0,bytereceive);

MessageBox.Show(box);
socketdone.Set();
}

catch(Exception my)
{
MessageBox.Show(my.Message.ToString(),"receivecallback(client)");
return; }