TcpListener 类

定义

public ref class TcpListener : IDisposable

public ref class TcpListener

public class TcpListener : IDisposable

public class TcpListener

type TcpListener = class
    interface IDisposable

type TcpListener = class

Public Class TcpListener
Implements IDisposable

Public Class TcpListener

继承

Object

TcpListener

实现

IDisposable

示例

下面的代码示例创建 。TcpListener

using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;

class MyTcpListener
{
  public static void Main()
  {
    TcpListener server = null;
    try
    {
      // Set the TcpListener on port 13000.
      Int32 port = 13000;
      IPAddress localAddr = IPAddress.Parse("127.0.0.1");

      // TcpListener server = new TcpListener(port);
      server = new TcpListener(localAddr, 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.
        // You could also use server.AcceptSocket() here.
        using TcpClient client = server.AcceptTcpClient();
        Console.WriteLine("Connected!");

        data = null;

        // Get a stream object for reading and writing
        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);

          // Process the data sent by the client.
          data = data.ToUpper();

          byte[] msg = System.Text.Encoding.ASCII.GetBytes(data);

          // Send back a response.
          stream.Write(msg, 0, msg.Length);
          Console.WriteLine("Sent: {0}", data);
        }
      }
    }
    catch(SocketException e)
    {
      Console.WriteLine("SocketException: {0}", e);
    }
    finally
    {
      server.Stop();
    }

    Console.WriteLine("\nHit enter to continue...");
    Console.Read();
  }
}

Imports System.IO
Imports System.Net
Imports System.Net.Sockets
Imports System.Text

Class MyTcpListener

    Public Shared Sub Main()

    Dim server As TcpListener
    server=nothing
        Try
            ' Set the TcpListener on port 13000.
         Dim port As Int32 = 13000
         Dim localAddr As IPAddress = IPAddress.Parse("127.0.0.1")

         server = New TcpListener(localAddr, port)
         
         ' Start listening for client requests.
         server.Start()
         
         ' Buffer for reading data
            Dim bytes(1024) As Byte
            Dim data As String = Nothing
         
         ' Enter the listening loop.
         While True
            Console.Write("Waiting for a connection... ")
            
            ' Perform a blocking call to accept requests.
            ' You could also use server.AcceptSocket() here.
            Dim client As TcpClient = server.AcceptTcpClient()
            Console.WriteLine("Connected!")
            
            data = Nothing
            
            ' Get a stream object for reading and writing
            Dim stream As NetworkStream = client.GetStream()
            
            Dim i As Int32
            
            ' Loop to receive all the data sent by the client.
            i = stream.Read(bytes, 0, bytes.Length)
            While (i <> 0) 
               ' Translate data bytes to a ASCII string.
               data = System.Text.Encoding.ASCII.GetString(bytes, 0, i)
                    Console.WriteLine("Received: {0}", data)
               
               ' Process the data sent by the client.
               data = data.ToUpper()
                    Dim msg As Byte() = System.Text.Encoding.ASCII.GetBytes(data)
               
               ' Send back a response.
               stream.Write(msg, 0, msg.Length)
                    Console.WriteLine("Sent: {0}", data)
              
               i = stream.Read(bytes, 0, bytes.Length)

            End While
            
            ' Shutdown and end connection
            client.Close()
         End While
      Catch e As SocketException
         Console.WriteLine("SocketException: {0}", e)
      Finally
         server.Stop()
      End Try
      
      Console.WriteLine(ControlChars.Cr + "Hit enter to continue....")
      Console.Read()
   End Sub

End Class

有关客户端示例，请参阅 TcpClient 。

注解

类 TcpListener 提供在阻止同步模式下侦听和接受传入连接请求的简单方法。 可以使用 TcpClient 或 Socket 来连接 TcpListener。 使用 TcpListenerIPEndPoint、本地 IP 地址和端口号或仅端口号Create 。 如果希望基础服务提供商为你分配这些值，请为本地 IP 地址指定 Any 0。 如果选择执行此操作，则可以在套接字连接后使用 LocalEndpoint 属性来标识分配的信息。

Start使用 方法开始侦听传入的连接请求。 Start 将排队传入连接，直到调用 Stop 方法或方法已 MaxConnections排队。 AcceptSocket使用 或 AcceptTcpClient 从传入的连接请求队列中拉取连接。 这两种方法将阻止。 如果要避免阻塞，可以先使用 Pending 方法来确定队列中是否有可用的连接请求。

Stop调用 方法以关闭 TcpListener。

另请参阅

• TcpClient