我想承认我不是c＃中最强的，我通过查看几个教程开发了这个程序，如果你能在答案中详细说明，我将非常感激。
我希望我的TCP服务器始终监听传入的连接，当新的TCP客户端连接时，我希望它丢弃旧的连接并使用新的连接。
我试图实现这个答案; https://stackoverflow.com/a/19387431/3540143
但我的问题是，当我模拟TCP客户端时，但不知何故，上面的答案只会收到一条消息（我当前的代码收到所有发送的消息），我也尝试转换数据，所以我收到它与下面的代码相同但没有任何成功。
我相信上面的代码只是接受新客户，而不会丢弃以前连接的客户端。
我当前的代码，一旦断开连接就可以处理连接并搜索新连接，我想这样做，所以我一直在寻找新的连接，如果新的客户端要连接我就丢弃目前让新人通过
public class TCPListener
{
public static void Listener()
{
TcpListener server = null;
try
{
// Set the TcpListener on carPort.
Int32 port = 5002;
// TcpListener server = new TcpListener(port);
server = new TcpListener(IPAddress.Any, port);
// Start listening for client requests.
server.Start();
// Buffer for reading data
Byte[] bytes = new Byte[256];
String data = null;
// Enter the listening loop.
while (true)
{
Console.Write("Waiting for a connection... ");
// Perform a blocking call to accept requests.
TcpClient client = server.AcceptTcpClient();
Console.WriteLine("Connected!");
// Get a stream object for reading
NetworkStream stream = client.GetStream();
int i;
// Loop to receive all the data sent by the client.
while ((i = stream.Read(bytes, 0, bytes.Length)) != 0)
{
// Translate data bytes to a ASCII string.
data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
Console.WriteLine("Received: {0}", data);
}
// Shutdown and end connection
Console.WriteLine("Client close");
client.Close();
}
}
catch (SocketException e)
{
Console.WriteLine("SocketException: {0}", e);
}
finally
{
// Stop listening for new clients.
Console.WriteLine("Stop listening for new clients.");
server.Stop();
}
}
}
编辑：如果有人需要我的问题的解决方案那么这就是我应用Cecilio Pardo建议的代码的样子，这非常棒！
public class TCPListener
{
Form form = new Form();
public static void Listener()
{
TcpListener server = null;
try
{
// Set the TcpListener on carPort.
Int32 port = 5002;
// TcpListener server = new TcpListener(port);
server = new TcpListener(IPAddress.Any, port);
// Start listening for client requests.
server.Start();
// Buffer for reading data
Byte[] bytes = new Byte[256];
String data = null;
// Enter the listening loop.
while (true)
{
Console.Write("Waiting for a connection... ");
// Perform a blocking call to accept requests.
TcpClient client = server.AcceptTcpClient();
Console.WriteLine("Connected!");
data = null;
bool dataAvailable = false;
// Get a stream object for reading
NetworkStream stream = client.GetStream();
int i;
while (true)
{
if (!dataAvailable)
{
dataAvailable = stream.DataAvailable;
//Console.WriteLine("Data Available: "+dataAvailable);
if (server.Pending())
{
Console.WriteLine("found new client");
break;
}
}
if (dataAvailable)
{
// Loop to receive all the data sent by the client.
i = stream.Read(bytes, 0, bytes.Length);
data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
Console.WriteLine("Received: {0}", data);
dataAvailable = false;
}
if (server.Pending())
{
Console.WriteLine("found new client");
break;
}
}
Console.WriteLine("Client close");
// Shutdown and end connection
client.Close();
}
}
catch (SocketException e)
{
Console.WriteLine("SocketException: {0}", e);
}
finally
{
// Stop listening for new clients.
Console.WriteLine("Stop listening for new clients.");
server.Stop();
}
}
}
答案 0 :(得分：0)
当您处于内部while循环中时，无法检查新连接。所以你必须在循环中添加这样的东西：
if ( server.Pending() ) break;
一旦另一个连接等待，它就会退出你的循环。
另一个问题是stream.Read将阻塞，直到某些数据可用，因此如果活动连接空闲，则不会处理新连接。所以你必须改变它，除非有一些数据，否则不要使用Read
stream.DataAvailable
答案 1 :(得分：0)
这是我正在使用的，到目前为止，它的运行情况还不错，我才刚刚开始处理这种类型的应用程序。如果我对此代码进行了重大更改或发现错误，则将更新：
class ClientListener
{
const int PORT_NO = 4500;
const string SERVER_IP = "127.0.0.1";
private TcpListener listener;
public async Task Listen()
{
IPAddress localAddress = IPAddress.Parse(SERVER_IP);
listener = new TcpListener(localAddress, PORT_NO);
Console.WriteLine("Listening on: " + SERVER_IP + ":" + PORT_NO);
listener.Start();
while (true)
{
// Accept incoming connection that matches IP / Port number
// We need some form of security here later
TcpClient client = await listener.AcceptTcpClientAsync();
if (client.Connected)
{
// Get the stream of data send by the server and create a buffer of data we can read
NetworkStream stream = client.GetStream();
byte[] buffer = new byte[client.ReceiveBufferSize];
int bytesRead = stream.Read(buffer, 0, client.ReceiveBufferSize);
// Convert the data recieved into a string
string data = Encoding.ASCII.GetString(buffer, 0, bytesRead);
Console.WriteLine("Recieved Data: " + data);
}
}
}
public void StopListening()
{
listener.Stop();
}
}