C# UdpClient使用

 

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public class UdpClientManager {     //接收数据事件     public Action<string> recvMessageEvent = null;     //发送结果事件     public Action<int> sendResultEvent = null;     //本地监听端口     public int localPort = 0;       private UdpClient udpClient = null;       public UdpClientManager(int localPort)     {         if (localPort < 0 || localPort > 65535)             throw new ArgumentOutOfRangeException("localPort is out of range");           this.localPort = localPort;     }       public void Start()     {         while (true)         {             try             {                 udpClient = new UdpClient(localPort, AddressFamily.InterNetwork);//指定本地监听port                 ReceiveMessage();                 break;             }             catch (Exception)             {                 Thread.Sleep(100);             }         }     }       private async void ReceiveMessage()     {         while (true)         {             if (udpClient == null)                 return;               try             {                 UdpReceiveResult udpReceiveResult = await udpClient.ReceiveAsync();                 string message = Encoding.UTF8.GetString(udpReceiveResult.Buffer);                 if (recvMessageEvent != null)                     recvMessageEvent(message);             }             catch (Exception ex)             {             }         }     }       //单播     public async void SendMessageByUnicast(string message, string destHost, int destPort)     {         if (string.IsNullOrEmpty(message))             throw new ArgumentNullException("message cant not null");         if (udpClient == null)             throw new ArgumentNullException("udpClient cant not null");         if (string.IsNullOrEmpty(destHost))             throw new ArgumentNullException("destHost cant not null");         if (destPort < 0 || destPort > 65535)             throw new ArgumentOutOfRangeException("destPort is out of range");           byte[] buffer = Encoding.UTF8.GetBytes(message);         int len = 0;         for (int i = 0; i < 3; i++)         {             try             {                 len = await udpClient.SendAsync(buffer, buffer.Length, new IPEndPoint(IPAddress.Parse(destHost), destPort));             }             catch (Exception)             {                 len = 0;             }               if (len <= 0)                 Thread.Sleep(100);             else                 break;         }           if (sendResultEvent != null)             sendResultEvent(len);     }       public void CloseUdpCliend()     {         if (udpClient == null)             throw new ArgumentNullException("udpClient cant not null");           try         {             udpClient.Client.Shutdown(SocketShutdown.Both);         }         catch (Exception)         {         }         udpClient.Close();         udpClient = null;     } }

　　

　　

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public class UdpServiceManager {     private readonly string broadCastHost = "255.255.255.255";     //接收数据事件     public Action<string> recvMessageEvent = null;     //发送结果事件     public Action<int> sendResultEvent = null;     //本地host     private string localHost = "";     //本地port     private int localPort = 0;       private UdpClient udpClient = null;       public UdpServiceManager(string localHost, int localPort)     {         if (string.IsNullOrEmpty(localHost))             throw new ArgumentNullException("localHost cant not null");         if (localPort < 0 || localPort > 65535)             throw new ArgumentOutOfRangeException("localPort is out of range");           this.localHost = localHost;         this.localPort = localPort;     }       public void Start()     {         while (true)         {             try             {                 udpClient = new UdpClient(new IPEndPoint(IPAddress.Parse(localHost), localPort));//绑定本地host和port                 ReceiveMessage();                 break;             }             catch (Exception)             {                 Thread.Sleep(100);             }         }     }       private async void ReceiveMessage()     {         while (true)         {             if (udpClient == null)                 return;               try             {                 UdpReceiveResult udpReceiveResult = await udpClient.ReceiveAsync();                 string message = Encoding.UTF8.GetString(udpReceiveResult.Buffer);                 if (recvMessageEvent != null)                     recvMessageEvent(message);             }             catch (Exception)             {             }         }     }       //单播     public async void SendMessageByUnicast(string message, string destHost, int destPort)     {         if (string.IsNullOrEmpty(message))             throw new ArgumentNullException("message cant not null");         if (string.IsNullOrEmpty(destHost))             throw new ArgumentNullException("destHost cant not null");         if (destPort < 0 || destPort > 65535)             throw new ArgumentOutOfRangeException("destPort is out of range");         if (udpClient == null)             throw new ArgumentNullException("udpClient cant not null");           byte[] buffer = Encoding.UTF8.GetBytes(message);         int len = 0;         for (int i = 0; i < 3; i++)         {             try             {                 len = await udpClient.SendAsync(buffer, buffer.Length, destHost, destPort);             }             catch (Exception)             {                 len = 0;             }               if (len <= 0)                 Thread.Sleep(100);             else                 break;         }           if (sendResultEvent != null)             sendResultEvent(len);     }       //广播     public async void SendMessageByBroadcast(string message)     {         if (string.IsNullOrEmpty(message))             throw new ArgumentNullException("message cant not null");         if (udpClient == null)             throw new ArgumentNullException("udpClient cant not null");           byte[] buffer = Encoding.UTF8.GetBytes(message);         int len = 0;         for (int i = 0; i < 3; i++)         {             try             {                 len = await udpClient.SendAsync(buffer, buffer.Length, broadCastHost, localPort);             }             catch (Exception ex)             {                 len = 0;             }               if (len <= 0)                 Thread.Sleep(100);             else                 break;         }           if (sendResultEvent != null)             sendResultEvent(len);     }       public void CloseUdpCliend()     {         if (udpClient == null)             throw new ArgumentNullException("udpClient cant not null");           try         {             udpClient.Client.Shutdown(SocketShutdown.Both);         }         catch (Exception)         {         }         udpClient.Close();         udpClient = null;     } }

　　

 

 

 

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public class UdpClientManager  {      //接收数据事件      public Action<string> recvMessageEvent = null;      //发送结果事件      public Action<int> sendResultEvent = null;      //本地监听端口      public int localPort = 0;      //组播地址      public string MultiCastHost = "";        private UdpClient udpClient = null;        public UdpClientManager(int localPort, string MultiCastHost)      {          if (localPort < 0 || localPort > 65535)              throw new ArgumentOutOfRangeException("localPort is out of range");          if (string.IsNullOrEmpty(MultiCastHost))              throw new ArgumentNullException("message cant not null");            this.localPort = localPort;          this.MultiCastHost = MultiCastHost;      }        public void Start()      {          while (true)          {              try              {                  udpClient = new UdpClient(localPort, AddressFamily.InterNetwork);//指定本地监听port                  udpClient.JoinMulticastGroup(IPAddress.Parse(MultiCastHost));                  ReceiveMessage();                  break;              }              catch (Exception)              {                  Thread.Sleep(100);              }          }      }        private async void ReceiveMessage()      {          while (true)          {              if (udpClient == null)                  return;                try              {                  UdpReceiveResult udpReceiveResult = await udpClient.ReceiveAsync();                  string message = Encoding.UTF8.GetString(udpReceiveResult.Buffer);                  if (recvMessageEvent != null)                      recvMessageEvent(message);              }              catch (Exception ex)              {              }          }      }        public async void SendMessageByMulticast(string message)      {          if (string.IsNullOrEmpty(message))              throw new ArgumentNullException("message cant not null");          if (udpClient == null)              throw new ArgumentNullException("udpClient cant not null");            byte[] buffer = Encoding.UTF8.GetBytes(message);          int len = 0;          for (int i = 0; i < 3; i++)          {              try              {                  len = await udpClient.SendAsync(buffer, buffer.Length, new IPEndPoint(IPAddress.Parse(MultiCastHost), localPort));              }              catch (Exception)              {                  len = 0;              }                if (len <= 0)                  Thread.Sleep(100);              else                  break;          }            if (sendResultEvent != null)              sendResultEvent(len);      }        public void CloseUdpCliend()      {          if (udpClient == null)              throw new ArgumentNullException("udpClient cant not null");            try          {              udpClient.Client.Shutdown(SocketShutdown.Both);          }          catch (Exception)          {          }          udpClient.Close();          udpClient = null;      }  }