Question

看看以下两个程序：

//Server

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;

namespace MyServerProgram
{
    class Program
    {
        static void Main(string[] args)
        {            
            IPAddress ip = IPAddress.Parse("127.0.0.1");
            int port = 2000;
            TcpListener listener = new TcpListener(ip, port);
            listener.Start();

            TcpClient client = listener.AcceptTcpClient();

            NetworkStream netStream = client.GetStream();

            BinaryReader br = new BinaryReader(netStream);

            try
            {
                while (client.Client.Connected)
                {
                    string str = br.ReadString();

                    Console.WriteLine(str);
                }
            }
            catch
            {
                br.Close();
                netStream.Close();
                client.Close();
                listener.Stop();
            }
        }
    }
}

//Client

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;

namespace MyClientProgram
{
    class Program
    {
        static void Main(string[] args)
        {
            int port = 2000;
            TcpClient client = new TcpClient("localhost", port);

            NetworkStream netStream = client.GetStream();

            BinaryWriter br = new BinaryWriter(netStream);

            try
            {
                int i=1;
                while (client.Client.Connected)
                {
                    br.Write(i.ToString());
                    br.Flush();
                    i++;

                    int milliseconds = 2000;
                    System.Threading.Thread.Sleep(milliseconds);
                }
            }
            catch
            {
                br.Close();
                netStream.Close();
                client.Close();
            }
        }
    }
}

这些程序运行正常。

假设在此程序的这一点上，我需要服务器在客户端连接到客户端后以及客户端断开连接时在屏幕上打印一条消息。

我该怎么做？

Answer 1

connected阻止执行并开始等待连接。因此，在此之后，您可以写消息该客户端TcpClient client = listener.AcceptTcpClient(); ShowMessage("Connected " + ((IPEndPoint)client.Client.RemoteEndPoint).Address);。您也可以编写连接的客户端地址。仅用于提供信息，但有时可能会有所帮助。

catch

要检测客户端断开连接，可以捕获异常。像这样更改您的catch (Exception ex) { var inner = ex.InnerException as SocketException; if (inner != null && inner.SocketErrorCode == SocketError.ConnectionReset) ShowMessage("Disconnected"); else ShowMessage(ex.Message); ...：

{{1}}

客户端连接到服务器后，如何使服务器打印通知？

1 个答案: