聊天室

许多语言都有Socket，可见Scoket有多流行。我对通信这方面还是很感兴趣的，但是无奈身边并没有这方面的高手。自己边学，边做了个这个聊天系统。。。还有许多漏洞了，大家指正吧。

using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;
 using System.Net.Sockets;
 using System.Net;
 using System.Threading;
 using System.IO; 
 
using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;
 using System.Net.Sockets;
 using System.Net;
 using System.Threading;
 using System.IO;namespace Server
 {
     public partial class Form1 : Form
     {
         public Form1()
         {
             InitializeComponent();
         }        #region //定义变量
         IPAddress HostIp = IPAddress.Parse("192.168.1.36");
         IPEndPoint point;
         Socket scoket;
         bool falge = true;
         Socket acceptScoket;
         #endregion        private void btnLoad_Click(object sender, EventArgs e)
         {
             IPHostEntry ieh = Dns.GetHostByName(Dns.GetHostName());            HostIp = ieh.AddressList[0];
             point = new IPEndPoint(HostIp, Int32.Parse("1600"));
             scoket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
             //使scoket与本地终端相关联
             scoket.Bind(point);
             scoket.Listen(50);
             acceptScoket = scoket.Accept();            //开启新的进程
             Thread th = new Thread(new ThreadStart(Process));
             th.Start();
         }        #region //声明委托
         delegate void SetTextCallBack(string str);        //定义回调函数
         private void SetText(string str)
         {
             this.textBox2.AppendText(str + "/r/n");
         }        #endregion
         #region //声明传送文件的委托
         delegate void TranferFile(string message);        //定义回调函数
         private void fileTranfer(string message)
         {
             //string fileName = SaveAsDialog();
             //FileStream file = File.Create(fileName);
             //if (fileName != null)
             //{
             //    Byte[] getBytes = new Byte[64];
             //    getBytes = Encoding.BigEndianUnicode.GetBytes(message.ToCharArray());
             //    file.Write(getBytes, getBytes.Length, 0);
             //    file.Close();
             //}
             //else
             //{
             //    statusStrip1.Text = "没有选择文件";
             //}
             SaveFileDialog saDialog = new SaveFileDialog();
             if (saDialog.ShowDialog() == DialogResult.OK)
             {
                 string fileName = saDialog.FileName;
                 FileStream file = File.Create(fileName);
                 int total =int.Parse(message.Substring(message.LastIndexOf('&') + 1, message.LastIndexOf('#')-message.LastIndexOf('&')-1));
                 while (total>0)
                 {
                     byte[] bytes = new byte[64];
                     acceptScoket.Receive(bytes,bytes.Length,0);
                     file.Write(bytes,0,bytes.Length);
                     total = total - bytes.Length;
                 }
                 file.Flush();
                 file.Close();
             }
             else
             {
                 MessageBox.Show("没有选择文件");
             }
         }
         #endregion        //定义接收过程函数
         private void Process()
         {
             if (acceptScoket.Connected)
             {
                 
                 while (falge)
                 {
                     byte[] info = new byte[64];
                     acceptScoket.Receive(info, info.Length, 0);
                     string message = Encoding.BigEndianUnicode.GetString(info);
                     if (message.Contains("&&"))
                     {
                         this.Invoke(new TranferFile(fileTranfer), new object[] { message });
                     }
                     else
                     {
                         this.Invoke(new SetTextCallBack(SetText), new object[] { message });
                     }
                 }
             }
         }         private string SaveAsDialog()
         {
             SaveFileDialog saDialog = new SaveFileDialog();
             if (saDialog.ShowDialog() == DialogResult.OK)
             {
                 string result = saDialog.FileName;
                 return result;
             }
             else
             {
                 return null;
             }
         }        private void btnSend_Click(object sender, EventArgs e)
         {
             try
             {
                 Byte[] sendBytes = new Byte[64];
                 string sendStr = this.textBox1.Text + ":" + this.textBox3.Text + "/r/n";
                 sendBytes = Encoding.BigEndianUnicode.GetBytes(sendStr.ToCharArray());
                 acceptScoket.Send(sendBytes, sendBytes.Length, 0);
             }
             catch
             {            }
         } 
    }
 }

客户端的代码非常类似，只需要把侦听的代码改为scolet,connect（）；即可。

可以自己试一下。