我的同步消息交换客户端类:
public class AsClient
{
private TcpClient connection;
public AsClient(int serverPort, String ip)
{
connection = new TcpClient(ip, port);
}
public AsMessage sendMessage(AsMessage message)
{
System.Diagnostics.Debug.WriteLine("Connected: " + connection.Connected);
NetworkStream ns = connection.GetStream();
StreamReader reader = new StreamReader(ns);
StreamWriter writer = new StreamWriter(ns);
// Send Message:
String msgToSendEncoded = message.encode();
writer.WriteLine(msgToSendEncoded);
writer.WriteLine("\n"); // each message is terminated by a paragraph
writer.Flush();
// Receive Message:
String msgReceivedRaw = reader.ReadLine();
AsMessage response = AsMessage.decode(msgReceivedRaw);
reader.Dispose();
writer.Dispose();
ns.Close();
return response;
}
}
如果我调试此应用程序,发送的第一条消息和收到的响应工作得非常好,但是一旦我想发送第二条消息,TcpClient.getStream()就会失败,并显示InvalidOperationException,该条件表明连接未建立了。
问题是我没有在任何地方主动关闭连接。如果我在调用getStream()
之前放入connection.Connect(host,port),它会失败,但套接字仍然连接,即使connection.Connected为false。
有什么想法可以解决这个问题吗?
答案 0 :(得分:1)
根据我的经验,Dispose关闭基础流。
所以你关闭Dispose上的连接。
答案 1 :(得分:0)
我在这段代码中遇到了同样的问题,该代码复制遵循MS文档中关于GetStream()的步骤:https://docs.microsoft.com/en-us/dotnet/api/system.net.sockets.tcpclient.getstream?view=netframework-4.8
public void Send(String message)
{
try
{
// Translate the passed message into ASCII and store it as a Byte array.
Byte[] data = Encoding.ASCII.GetBytes(message);
// Get a client stream for reading and writing.
NetworkStream stream = Client.GetStream();
stream.Write(data, 0, data.Length);
stream.Close(); // this also closses the connection the server!
}
catch (Exception e)
{
LogException(e);
}
}
我们在服务器端看到的是: 1)建立连接。 2)消息永远不会到达。 3)执行stream.Close()语句时,服务器报告客户端关闭了连接。 检查流的属性,我可以看到流拥有套接字。因此,它关闭时也必须关闭其插座。怎么了???