commonmethod.cs

C常用算法程序集,一部比较经典的程序算法合集

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace mychat1
{
  public class commonmethod
    {
      public static string serverip="192.168.1.2";
      public static int port = 9050;
      public static void sendtoserver(string str)
      {
          TcpClient server;
          try
          {

              server = new TcpClient(serverip ,port);
              byte[] info = Encoding.Unicode.GetBytes(str);
              server.Client.Send(info);
          }
          catch (SocketException)
          {
              throw new Exception("unable to connect to server!");
            
          }

          server.Close();
      }
     public static void sendtoserver(string str,out string myownip)
     {
         TcpClient server;
         try
         {
             server = new TcpClient(serverip, port);
             myownip = server.Client.LocalEndPoint.ToString();
             byte[] info = Encoding.Unicode.GetBytes(str);
             server.Client.Send(info);
         }
         catch (SocketException)
         {
             throw new Exception("unable to connect to server!");
         }

         server.Close();
     }
      public static void sendtosevermessage(string str)
      {
          byte[] data = new byte[1024];
          Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
          IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(serverip), 9053);
          data =Encoding .Unicode .GetBytes (str);
          server.SendTo(data, data.Length, SocketFlags.None, ipep);
          server.Close();      
      }
      public static string receiverfromserver(string myownip,out string hername)
      {
          string stringdata = null;
         
              int recv = 0;
              byte[] data = new byte[1024];
              string[] mine = myownip.Split(':');
              IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(mine[0]), Convert.ToInt32(mine[1]));
              Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
              newsock.Bind(ipep);
              IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
              EndPoint Remote = (EndPoint)sender;
              recv = newsock.ReceiveFrom(data, ref Remote);
              newsock.Close();
              stringdata = Encoding.Unicode.GetString(data, 0, recv);
              string[] hernames = stringdata.Split(' ');
              hername = hernames[0];       
         return stringdata;
      }

    }
}