C# Socket.ReceiveFrom方法代碼示例

public static void ReceiveFrom1()
{
    IPHostEntry hostEntry = Dns.GetHostEntry(Dns.GetHostName());
    IPEndPoint endPoint = new IPEndPoint(hostEntry.AddressList[0], 11000);

    Socket s = new Socket(endPoint.Address.AddressFamily,
        SocketType.Dgram,
        ProtocolType.Udp);
  
    // Creates an IPEndPoint to capture the identity of the sending host.
    IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
    EndPoint senderRemote = (EndPoint)sender;
    
    // Binding is required with ReceiveFrom calls.
    s.Bind(endPoint);
    
    byte[] msg = new Byte[256];
    Console.WriteLine ("Waiting to receive datagrams from client...");
    
    // This call blocks. 
    s.ReceiveFrom(msg, ref senderRemote);
    s.Close();
}

public static void ReceiveFrom2()
{
    IPHostEntry hostEntry = Dns.GetHostEntry(Dns.GetHostName());
    IPEndPoint endPoint = new IPEndPoint(hostEntry.AddressList[0], 11000);

    Socket s = new Socket(endPoint.Address.AddressFamily,
        SocketType.Dgram,
        ProtocolType.Udp);
    
    // Creates an IpEndPoint to capture the identity of the sending host.
    IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
    EndPoint senderRemote = (EndPoint)sender;
    
    // Binding is required with ReceiveFrom calls.
    s.Bind(endPoint);
    
    byte[] msg = new Byte[256];
    Console.WriteLine ("Waiting to receive datagrams from client...");
    // This call blocks. 
    s.ReceiveFrom(msg, SocketFlags.None, ref senderRemote);
    s.Close();
}

public static void ReceiveFrom3()
{
    IPHostEntry hostEntry = Dns.GetHostEntry(Dns.GetHostName());
    IPEndPoint endPoint = new IPEndPoint(hostEntry.AddressList[0], 11000);

    Socket s = new Socket(endPoint.Address.AddressFamily,
        SocketType.Dgram,
        ProtocolType.Udp);
  
    // Creates an IPEndPoint to capture the identity of the sending host.
    IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
    EndPoint senderRemote = (EndPoint)sender;
    
    // Binding is required with ReceiveFrom calls.
    s.Bind(endPoint);
    
    byte[] msg = new Byte[256];
    Console.WriteLine ("Waiting to receive datagrams from client...");
    // This call blocks. 
    s.ReceiveFrom(msg, msg.Length, SocketFlags.None, ref senderRemote);
    s.Close();
}

public static void ReceiveFrom4()
{
    IPHostEntry hostEntry = Dns.GetHostEntry(Dns.GetHostName());
    IPEndPoint endPoint = new IPEndPoint(hostEntry.AddressList[0], 11000);

    Socket s = new Socket(endPoint.Address.AddressFamily,
        SocketType.Dgram,
        ProtocolType.Udp);
        
    // Creates an IpEndPoint to capture the identity of the sending host.
    IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
    EndPoint senderRemote = (EndPoint)sender;
    
    // Binding is required with ReceiveFrom calls.
    s.Bind(endPoint);
    byte[] msg = new Byte[256];
    Console.WriteLine ("Waiting to receive datagrams from client...");
    // This call blocks.  
    s.ReceiveFrom(msg, 0, msg.Length, SocketFlags.None, ref senderRemote);
    s.Close();
}

/*
C# Network Programming 
by Richard Blum

Publisher: Sybex 
ISBN: 0782141765
*/
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class SimpleUdpClient
{
   public static void Main()
   {
      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.Dgram, ProtocolType.Udp);


      string welcome = "Hello, are you there?";
      data = Encoding.ASCII.GetBytes(welcome);
      server.SendTo(data, data.Length, SocketFlags.None, ipep);

      IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
      EndPoint Remote = (EndPoint)sender;

      data = new byte[1024];
      int recv = server.ReceiveFrom(data, ref Remote);

      Console.WriteLine("Message received from {0}:", Remote.ToString());
      Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));

      while(true)
      {
         input = Console.ReadLine();
         if (input == "exit")
            break;
         server.SendTo(Encoding.ASCII.GetBytes(input), Remote);
         data = new byte[1024];
         recv = server.ReceiveFrom(data, ref Remote);
         stringData = Encoding.ASCII.GetString(data, 0, recv);
         Console.WriteLine(stringData);
      }
      Console.WriteLine("Stopping client");
      server.Close();
   }
}