Socket 服务器数据接收混乱

Question

编写一个小的 c# 应用程序，它可以接受客户端连接并进行相应的处理。我为此使用异步 tcp 套接字，因为我想允许多个客户端同时向服务器发送数据。现在我不确定如何处理回调函数中收到的数据。下面是数据接收回调的代码。每次接收数据时，它都会打开输出文件并将数据附加到其中。我想在保存文件之前获取一些文件名/说一些客户名。我怎么做。我正在发送以“|”结尾的客户端名称字符以区别于其他数据，但如何处理并将其保存到数据接收回调的变量中？任何帮助都会非常有用。

public void OnDataReceived(IAsyncResult ar)
{
  StateObject state = (StateObject)ar.AsyncState;
  Socket clientSocket = state.m_currentSocket;
  BinaryWriter writer;

  string fileSavePath = m_strCurrFolder[m_currClientNumber] + "File";
  int bytesRead = clientSocket.EndReceive(ar);
  if (bytesRead > 0)
  {
    //If the file doesn't exist, create a file with the filename got from server. If the file exists, append to the file. 
    if (!File.Exists(fileSavePath))
    {
      writer = new BinaryWriter(File.Open(fileSavePath, FileMode.Create));
    }
    else
    {
      writer = new BinaryWriter(File.Open(fileSavePath, FileMode.Append));
    }

    writer.Write(state.dataBuffer, 0, bytesRead);
    writer.Flush();
    writer.Close();

    // Recursively receive the rest file. 
    try
    {
      clientSocket.BeginReceive(state.dataBuffer, 0, StateObject.BufferSize, 0, new AsyncCallback(OnDataReceived), state);
    }
    catch
    {
      if (!clientSocket.Connected)
      {
        //MessageBox.Show(Properties.Resources.DisconnectMsg);
        MessageBox.Show("Catched from OnDataReceived!");
      }
    }
  }
  else
  {
    // Signal if all the file received. 
  }
}

Answer 1

我已经为带有客户端和服务器的 TCP 网络制作了一个 dll。 http://the7skulls.blogspot.com/2015/03/how-to-tcp-with-server-and-client-in-c.html