private void OnReceiveCompleted(object sender, SocketAsyncEventArgs e)
{
if (e.SocketError == SocketError.OperationAborted)
{
return;
}
Socket socket = sender as Socket;
if (e.SocketError == SocketError.Success && e.BytesTransferred > 0)
{
string ipAdress = socket.RemoteEndPoint.ToString();
int lengthBuffer = e.BytesTransferred;
byte[] receiveBuffer = e.Buffer;
byte[] buffer = new byte[lengthBuffer];
Buffer.BlockCopy(receiveBuffer, 0, buffer, 0, lengthBuffer);
//string msg = Encoding.Unicode.GetString(buffer);
//Console.WriteLine("Client : receive message[ {0} ],from Server[ {1} ]", msg, ipAdress);
OnReceiveHandle?.Invoke(buffer);
socket.ReceiveAsync(e);
}
else if (e.SocketError == SocketError.ConnectionReset && e.BytesTransferred == 0)
{
Console.WriteLine("Client: 伺服器斷開連接 ");
}
else
{
return;
}
}
/// <summary>
/// This method is invoked when an asynchronous receive operation completes.
/// If the remote host closed the connection, then the socket is closed.
/// If data was received then the data is echoed back to the client.
/// </summary>
/// <param name="e"></param>
private void ProcessReceive(SocketAsyncEventArgs e)
{
AsyncUserToken token = e.UserToken as AsyncUserToken;
// e.BytesTransferred获取套接字操作中传输的字节数。
if (e.BytesTransferred > 0 && e.SocketError == SocketError.Success)
{
token.ActiveDateTime = DateTime.Now;
int lengthBuffer = e.BytesTransferred;
byte[] receiveBuffer = e.Buffer;
byte[] buffer = new byte[lengthBuffer];
Buffer.BlockCopy(receiveBuffer, e.Offset, buffer, 0, lengthBuffer);
OnReceiveHandle?.Invoke(token.ID, buffer);
bool willRaiseEvent = token.AcceptSocket.ReceiveAsync(e);
if (!willRaiseEvent)
{
ProcessReceive(e);
}
}
else
{
CloseClientSocket(e);
}
}