在netframework v2中,套接字使用Invoke(BeginRead)方法调用方法(示例ReceiveMsg),如下所示:
client = new TcpClient();
client.Connect(SERVERIP,PORTNO);
data = new byte [client.ReceiveBufferSize];
SendMessage("hello\n");
client.GetStream() . BeginRead(data,0,System.Convert.ToInt32(client.ReceiveBufferSize),ReceiveMsg,null);
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此方法的ReceiveMsg套接字是否始终处于“自动模式”,以便它将等待接收SocketServer广播的消息?
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或者正在使用System.Threading.Thread.Sleep()使ReceiveMsg方法始终处于活动状态,以便它在SocketServer广播消息时处于就绪模式以响应?
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如何在Netframework v4或4.5套接字中为此ReceiveMsg方法执行此操作,因为不再需要BeginRead() .
谢谢 .
下面是netframework v4中socket的代码:http://msdn.microsoft.com/en-us/library/hh202858(v=vs.92).aspx(对于WP mango / Wp8)
Client.Connect(); Client.Send(); Client.Receive();
public string Receive()
{
//-- receive the reply from server
string response = "Receiving Operation Timeout";
// We are receiving over an established socket connection
if (_socket != null)
{
// Create SocketAsyncEventArgs context object
SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs();
socketEventArg.RemoteEndPoint = _socket.RemoteEndPoint;
// Setup the buffer to receive the data
socketEventArg.SetBuffer(new Byte[MAX_BUFFER_SIZE], 0, MAX_BUFFER_SIZE);
// Inline event handler for the Completed event.
// Note: This even handler was implemented inline in order to make this method self-contained.
socketEventArg.Completed += new EventHandler(delegate(object s, SocketAsyncEventArgs e)
{
if (e.SocketError == SocketError.Success)
{
// Retrieve the data from the buffer
response = Encoding.UTF8.GetString(e.Buffer, e.Offset, e.BytesTransferred);
response = response.Trim('\0');
}
else
{
response = e.SocketError.ToString();
}
_clientDone.Set();
});
// Sets the state of the event to nonsignaled, causing threads to block
_clientDone.Reset();
// Make an asynchronous Receive request over the socket
_socket.ReceiveAsync(socketEventArg);
// Block the UI thread for a maximum of TIMEOUT_MILLISECONDS seconds.
// If no response comes back within this time then proceed
_clientDone.WaitOne(TIMEOUT_MILLISECONDS);
}
else
{
response = "Socket is not initialized";
}
return response;
}