TcpClient已建立,但TcpClient.getStream()失败
本文关键字:TcpClient 失败 getStream 建立 | 更新日期: 2023-09-27 18:24:55
用于同步消息交换的My Client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;
}
}
如果我调试这个应用程序,发送的第一条消息和接收的响应都能很好地工作,但只要我想发送第二条消息,TcpClient.getStream()就会失败,并显示InvalidOperationException,这表示连接不再建立。
问题是我没有主动关闭任何地方的连接。如果我把连接。Connect(主机,端口)在调用getStream()
之前,它会失败,除非套接字仍然连接,即使是连接。Connected为false。
有什么解决这个问题的想法吗?
根据我的经验,Dispose关闭底层流。
因此,您关闭了Dispose上的连接。
我在这段代码中遇到了同样的问题,该代码按照MS文档中GetStream()的步骤进行复制:https://learn.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) 连接已建立。2) 消息永远不会到达。3) 当流。Close()语句执行时,服务器报告客户端关闭了连接。通过检查流的属性,我可以看到流拥有套接字。所以,当它关闭时,它也必须关闭它的插座。为什么???