我仍在尝试改善我之前写的内容。
现在,我在接收数据时遇到了问题。我有一个程序,可以使用tcpClient将字符串发送到程序,在该程序中,我在指定端口上进行监听。它工作正常,所以我决定再发送一次数据
public static void receiveThread()
{
while (true)
{
TcpListener tcpListener = new TcpListener(IPAddress.Any, port);
tcpListener.Start();
Console.WriteLine("Waiting for connection...");
TcpClient tcpClient = tcpListener.AcceptTcpClient();
Console.WriteLine("Connected with {0}", tcpClient.Client.RemoteEndPoint);
while (!(tcpClient.Client.Poll(20, SelectMode.SelectRead)))
{
NetworkStream networkStream = tcpClient.GetStream();
StreamReader streamReader = new StreamReader(networkStream);
data = streamReader.ReadLine();
if (data != null)
{
Console.WriteLine("Received data: {0}", data);
send(data); // Here Im using send Method
}
}
Console.WriteLine("Dissconnected...\n");
tcpListener.Stop();
}
}
/// <summary>
/// Sending data
/// </summary>
/// <param name="data">Data to send</param>
public static void send(string data)
{
TcpClient tcpClient = new TcpClient();
try
{
tcpClient.Connect(ipAddress, sendPort);
Console.WriteLine("Connected with {0}", tcpClient.Client.RemoteEndPoint);
}
catch (Exception e)
{
Console.WriteLine(e);
}
if (tcpClient.Connected)
{
NetworkStream networkStream = tcpClient.GetStream();
StreamWriter streamWriter = new StreamWriter(networkStream);
Console.WriteLine("Messege {0} to {1}", data, tcpClient.Client.RemoteEndPoint);
streamWriter.WriteLine(data);
streamWriter.Flush();
tcpClient.Close();
}
}
有时它可以正常工作,但更常见的是,让它称为接收器,而无法获得Im试图发送的内容。我真的不知道这是怎么回事。看起来send方法可能有问题。这是接收器输出的示例
Waiting for connection...
Connected with 127.0.0.1:52449
Dissconnected...
Waiting for connection...
Connected with 127.0.0.1:52450
Received data: qweqwe
Dissconnected...
Waiting for connection...
Connected with 127.0.0.1:52451
Dissconnected...
Waiting for connection...
Connected with 127.0.0.1:52452
Dissconnected...
Waiting for connection...
Connected with 127.0.0.1:52453
Received data: zxczx
Dissconnected...
Waiting for connection...
Connected with 127.0.0.1:52454
Dissconnected...
Waiting for connection...
Connected with 127.0.0.1:52455
Received data: aasd
Dissconnected...
Waiting for connection...
Connected with 127.0.0.1:52457
Received data: www
Dissconnected...
最佳答案
这里有几个问题:
StreamReader
具有4kB的缓冲区,在第一次调用ReadLine()
时将尝试读取尽可能多的内容。结果是您可能已经在StreamReader中存储了数据,并且在没有更多可用数据(因为已经被读取)时进入Poll()。 Poll()
需要微秒。除非等待调用Poll()
之前已有数据,否则等待 0.02ms 传入的数据很可能返回false。 如果您只是想读取行并想要超时和
StreamReader
,我将执行以下操作:delegate string ReadLineDelegate ();
...
using (NetworkStream networkStream = tcpClient.GetStream()) {
StreamReader reader = new StreamReader(networkStream);
ReadLineDelegate rl = new ReadLineDelegate (reader.ReadLine);
while (true) {
IAsyncResult ares = rl.BeginInvoke (null, null);
if (ares.AsyncWaitHandle.WaitOne (100) == false)
break; // stop after waiting 100ms
string str = rl.EndInvoke (ares);
if (str != null) {
Console.WriteLine ("Received: {0}", str);
send (str);
}
}
}
关于c# - 用C#接收和发送数据,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/1836811/