简单的TCP聊天应用程序c＃

Question

我尝试使局域网聊天应用程序，使用C＃中的Send（）和Receive（）函数来发送和接收消息。但问题是，当消息用户类型到控制台，然后按Enter键键盘，这种内容突然出现在控制台屏幕的WriteLine我的形式出现之前（例如：我的预期是你：你好）

我怎么能删除线“你好”。我希望是：
客户：您好
你：你好

代码服务器：

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

namespace SimpleTcpSrvr 
{ 
    class Program 
    { 
     static void Main(string[] args) 
     { 
      Console.OutputEncoding = Encoding.UTF8; 

      int recv; 

      byte[] data = new byte[1024]; 

      IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"),9050); 

      Socket newsock = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp); 

      newsock.Bind(ipep); 

      newsock.Listen(10); 

      Console.WriteLine("Waiting for a client..."); 

      Socket client = newsock.Accept(); 

      IPEndPoint clientep = (IPEndPoint)client.RemoteEndPoint; 

      Console.WriteLine("Connected with {0} at port {1}",clientep.Address,clientep.Port); 

      string welcome = "Welcome to my test server"; 

      data = Encoding.UTF8.GetBytes(welcome); 

      client.Send(data,data.Length,SocketFlags.None); 

      string input; 

      while (true) 
      { 

       data = new byte[1024]; 

       recv = client.Receive(data); 

       if (recv == 0) 

        break; 

       Console.WriteLine("Client: "+Encoding.UTF8.GetString(data, 0, recv)); 

       input = Console.ReadLine(); 

       Console.WriteLine("You: " + input); 

       client.Send(Encoding.UTF8.GetBytes(input)); 
      } 

      Console.WriteLine("Disconnected from {0}", clientep.Address); 

      client.Close(); 

      newsock.Close(); 

      Console.ReadLine(); 

     } 
    } 
} 

代码客户端：

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

namespace SimpleTcpClient 
{ 
    class Program 
    { 
     static void Main(string[] args) 
     { 
      Console.OutputEncoding = Encoding.UTF8; 

      byte[] data = new byte[1024]; 

      string input, stringData; 

      IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"),9050); 

      Socket server = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp); 

      try 
      { 
       server.Connect(ipep); 

      } 
      catch(SocketException e) 
      { 
       Console.WriteLine("Unable to connect to server."); 

       Console.WriteLine(e.ToString()); 

       return; 
      } 

      int recv = server.Receive(data); 

      stringData = Encoding.UTF8.GetString(data, 0, recv); 

      Console.WriteLine(stringData); 

      while (true) 
      { 
       input = Console.ReadLine(); 

       if (input == "exit") 

        break; 

       Console.WriteLine("You: " + input); 

       server.Send(Encoding.UTF8.GetBytes(input)); 

       data = new byte[1024]; 

       recv = server.Receive(data); 

       stringData = Encoding.UTF8.GetString(data, 0, recv); 

       byte[] utf8string = System.Text.Encoding.UTF8.GetBytes(stringData); 

       Console.WriteLine("Server: "+stringData); 
      } 

      Console.WriteLine("Disconnecting from server..."); 

      server.Shutdown(SocketShutdown.Both); 

      server.Close(); 

      Console.WriteLine("Disconnected!"); 

      Console.ReadLine(); 

     } 
    } 
} 

谢谢大家！

Answer 1

您可以试试这个，将光标位置设置回ReadLine &之后的上一行的开头，然后用您的文本覆盖该行 - 在您的情况下，因为您正在预先设置“您：”您的输出字符串将长于输入字符串 - 如果它较小，可以用空格覆盖以清除多余的字符。

input = Console.ReadLine(); 
    Console.SetCursorPosition(0, Console.CursorTop-1); 
    Console.WriteLine("You: " + input);