基于UDP协议的程序设计

1 　　　　　　　UdpClient udpClient = new UdpClient();
2             IPAddress remoteAddress = IPAddress.Parse("127.0.0.1");
3             IPEndPoint iep = new IPEndPoint(remoteAddress, 8000);

1 byte[] sendBytes = System.Text.Encoding.Unicode.GetBytes("Hello C#");
2 udpClient.Send(sendBytes,sendBytes.Length,iep);

1 IPEndPoint iep2 = new IPEndPoint(IPAddress.Any, 0);
2 byte[] receiveBytes = udpClient.Receive(ref iep2);
3 string getData = System.Text.Encoding.Unicode.GetString(receiveBytes);

1 udpClient.Close();

1 UdpClient udpClient2 = new UdpClient("127.0.0.1",8000);
2 udpClient2.Send(sendBytes, sendBytes.Length);

 1 class Program
 2     {
 3         static void Main(string[] args)
 4         {
 5             StartListener();
 6             Console.ReadLine();
 7         }
 8 
 9         private static void StartListener()
10         {
11             UdpClient udpServer = new UdpClient(8000); //服务器方的端口号为8000
12 
13             IPEndPoint myHost = null;
14 
15             try
16             {
17                 while(true)
18                 {
19                     Console.WriteLine("等待接收...");
20                     byte[] getBytes = udpServer.Receive(ref myHost);
21                     string getString = Encoding.Unicode.GetString(getBytes, 0, getBytes.Length);
22                     Console.WriteLine("接收信息:{0}",getString);
23                     if (getString == "quit")
24                         break;
25                     
26                         //向客户端回送消息
27                         string sendString = "你好，Client";
28                         Console.WriteLine("发送消息:{0}", sendString);
29                         byte[] sendBytes = Encoding.Unicode.GetBytes(sendString);
30                         udpServer.Send(sendBytes, sendBytes.Length, "127.0.0.1", 8001);
31                         
32                 }
33 
34                 udpServer.Close();
35                 Console.WriteLine("Client已经退出，请按回车键退出");
36 
37             }
38             catch(Exception e)
39             {
40                 Console.WriteLine(e.Message);
41             }
42 
43         }
44    }

 1 class Program
 2     {
 3         static void Main(string[] args)
 4         {
 5             string sendString = "客户端发送";
 6             Send(sendString);
 7             Send("quit");
 8             Console.WriteLine();
 9         }
10 
11         private static void Send(string sendString)
12         {
13             UdpClient udpClient = new UdpClient(8001);
14             try
15             {
16                 Console.WriteLine("向服务器发送数据:{0}",sendString);
17                 byte[] sendBytes = Encoding.Unicode.GetBytes(sendString);
18                 udpClient.Send(sendBytes, sendBytes.Length, "127.0.0.1", 8000);
19                 if(sendString == "quit")
20                 {
21                     Console.WriteLine("已经向对方发送quit消息，请按回车键退出程序");
22                         return;
23                 }
24 
25                 IPEndPoint myHost = null;
26                 byte[] getBytes = udpClient.Receive(ref myHost);
27                 string getString = Encoding.Unicode.GetString(getBytes);
28                 Console.WriteLine("接收信息:{0}",getString);
29                 udpClient.Close();
30                 Console.ReadLine();
31 
32             }
33             catch(Exception ex)
34             {
35                 Console.WriteLine(ex.Message);
36             }
37         }
38     }