点对点聊天程序

本文介绍了一个简单的点对点聊天程序的设计与实现,利用Socket进行客户端间的直接通信,支持发送和接收文本消息。
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Threading;
using System.Text;

namespace 点对点聊天
{
    
/// <summary>
    
/// Form1 的摘要说明。
    
/// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        
private System.Windows.Forms.Label label1;
        
private System.Windows.Forms.Button button1;
        
private System.Windows.Forms.TextBox textBox1;
        
private System.Windows.Forms.Label label2;
        
private System.Windows.Forms.TextBox textBox2;
        
private System.Windows.Forms.Label label3;
        
private System.Windows.Forms.TextBox textBox3;
        
private System.Windows.Forms.TextBox textBox4;
        
private System.Windows.Forms.Button button2;
        
private System.Windows.Forms.Label label4;
        
private System.Windows.Forms.Button button3;
        
private System.Windows.Forms.RichTextBox richTextBox1;
        
private System.Windows.Forms.GroupBox groupBox1;
        
private System.Windows.Forms.GroupBox groupBox2;
        
private System.Windows.Forms.StatusBar statusBar1;
        
private System.Windows.Forms.GroupBox groupBox4;
        
private System.Windows.Forms.Label label5;
        
private System.Windows.Forms.TextBox textBox5;
        
private System.Windows.Forms.TextBox textBox6;
        
private System.Windows.Forms.Label label6;
        
private System.Windows.Forms.Button button4;
        
private System.Windows.Forms.GroupBox groupBox3;
        
private System.Windows.Forms.RichTextBox richTextBox2;
        
private System.Windows.Forms.Button button5;
        
private Thread listenthread;//表示监听的线程
        private    string msg; //要发送的消息
        private Socket socket1; //Socket类用于接收和发送信息        
        private IPEndPoint lep;
        
private System.Windows.Forms.GroupBox groupBox5; //请求连接的节点        
        /// <summary>
        
/// 必需的设计器变量。
        
/// </summary>
        private System.ComponentModel.Container components = null;

        
public Form1()
        {
            
//
            
// Windows 窗体设计器支持所必需的
            
//
            InitializeComponent();

            
//
            
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            
//
        }
        
/// <summary>
        
/// 清理所有正在使用的资源。
        
/// </summary>
        protected override void Dispose( bool disposing )
        {
            
if( disposing )
            {
                
if (components != null
                {
                    components.Dispose();
                }
            }
            
base.Dispose( disposing );
        }

        
#region Windows 窗体设计器生成的代码
        
/// <summary>
        
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
        
/// 此方法的内容。
        
/// </summary>
        private void InitializeComponent()
        {
            
this.label1 = new System.Windows.Forms.Label();
            
this.button1 = new System.Windows.Forms.Button();
            
this.textBox1 = new System.Windows.Forms.TextBox();
            
this.label2 = new System.Windows.Forms.Label();
            
this.textBox2 = new System.Windows.Forms.TextBox();
            
this.label3 = new System.Windows.Forms.Label();
            
this.textBox3 = new System.Windows.Forms.TextBox();
            
this.textBox4 = new System.Windows.Forms.TextBox();
            
this.button2 = new System.Windows.Forms.Button();
            
this.label4 = new System.Windows.Forms.Label();
            
this.button3 = new System.Windows.Forms.Button();
            
this.richTextBox1 = new System.Windows.Forms.RichTextBox();
            
this.groupBox1 = new System.Windows.Forms.GroupBox();
            
this.textBox6 = new System.Windows.Forms.TextBox();
            
this.label6 = new System.Windows.Forms.Label();
            
this.button5 = new System.Windows.Forms.Button();
            
this.label5 = new System.Windows.Forms.Label();
            
this.textBox5 = new System.Windows.Forms.TextBox();
            
this.groupBox2 = new System.Windows.Forms.GroupBox();
            
this.statusBar1 = new System.Windows.Forms.StatusBar();
            
this.groupBox4 = new System.Windows.Forms.GroupBox();
            
this.button4 = new System.Windows.Forms.Button();
            
this.groupBox3 = new System.Windows.Forms.GroupBox();
            
this.richTextBox2 = new System.Windows.Forms.RichTextBox();
            
this.groupBox5 = new System.Windows.Forms.GroupBox();
            
this.groupBox1.SuspendLayout();
            
this.groupBox2.SuspendLayout();
            
this.groupBox4.SuspendLayout();
            
this.groupBox3.SuspendLayout();
            
this.groupBox5.SuspendLayout();
            
this.SuspendLayout();
            
// 
            
// label1
            
// 
            this.label1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            
this.label1.Location = new System.Drawing.Point(816);
            
this.label1.Name = "label1";
            
this.label1.Size = new System.Drawing.Size(6423);
            
this.label1.TabIndex = 0;
            
this.label1.Text = "主机名称:";
            
this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
            
// 
            
// button1
            
// 
            this.button1.Location = new System.Drawing.Point(8016);
            
this.button1.Name = "button1";
            
this.button1.Size = new System.Drawing.Size(4023);
            
this.button1.TabIndex = 1;
            
this.button1.Text = "获取";
            
this.button1.Click += new System.EventHandler(this.button1_Click);
            
// 
            
// textBox1
            
// 
            this.textBox1.Location = new System.Drawing.Point(848);
            
this.textBox1.Name = "textBox1";
            
this.textBox1.Size = new System.Drawing.Size(11221);
            
this.textBox1.TabIndex = 2;
            
this.textBox1.Text = "";
            
// 
            
// label2
            
// 
            this.label2.Location = new System.Drawing.Point(872);
            
this.label2.Name = "label2";
            
this.label2.Size = new System.Drawing.Size(6423);
            
this.label2.TabIndex = 0;
            
this.label2.Text = "IP地址:";
            
this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
            
// 
            
// textBox2
            
// 
            this.textBox2.Location = new System.Drawing.Point(896);
            
this.textBox2.Name = "textBox2";
            
this.textBox2.Size = new System.Drawing.Size(11221);
            
this.textBox2.TabIndex = 2;
            
this.textBox2.Text = "";
            
// 
            
// label3
            
// 
            this.label3.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
            
this.label3.Location = new System.Drawing.Point(80112);
            
this.label3.Name = "label3";
            
this.label3.Size = new System.Drawing.Size(6423);
            
this.label3.TabIndex = 3;
            
this.label3.Text = "我的妮称:";
            
this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
            
// 
            
// textBox3
            
// 
            this.textBox3.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
            
this.textBox3.Location = new System.Drawing.Point(136112);
            
this.textBox3.Name = "textBox3";
            
this.textBox3.Size = new System.Drawing.Size(12821);
            
this.textBox3.TabIndex = 4;
            
this.textBox3.Text = "";
            
// 
            
// textBox4
            
// 
            this.textBox4.Location = new System.Drawing.Point(848);
            
this.textBox4.Name = "textBox4";
            
this.textBox4.Size = new System.Drawing.Size(12021);
            
this.textBox4.TabIndex = 5;
            
this.textBox4.Text = "221.237.165.15";
            
// 
            
// button2
            
// 
            this.button2.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
            
this.button2.Location = new System.Drawing.Point(272112);
            
this.button2.Name = "button2";
            
this.button2.Size = new System.Drawing.Size(7223);
            
this.button2.TabIndex = 6;
            
this.button2.Text = "发送";
            
this.button2.Click += new System.EventHandler(this.button2_Click);
            
// 
            
// label4
            
// 
            this.label4.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            
this.label4.Location = new System.Drawing.Point(816);
            
this.label4.Name = "label4";
            
this.label4.Size = new System.Drawing.Size(12023);
            
this.label4.TabIndex = 7;
            
this.label4.Text = "服务器IP:";
            
this.label4.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
            
// 
            
// button3
            
// 
            this.button3.Location = new System.Drawing.Point(848);
            
this.button3.Name = "button3";
            
this.button3.Size = new System.Drawing.Size(6423);
            
this.button3.TabIndex = 8;
            
this.button3.Text = "开始监听";
            
this.button3.Click += new System.EventHandler(this.button3_Click);
            
// 
            
// richTextBox1
            
// 
            this.richTextBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
                
| System.Windows.Forms.AnchorStyles.Left) 
                
| System.Windows.Forms.AnchorStyles.Right)));
            
this.richTextBox1.Location = new System.Drawing.Point(816);
            
this.richTextBox1.MaxLength = 1000;
            
this.richTextBox1.Name = "richTextBox1";
            
this.richTextBox1.Size = new System.Drawing.Size(33688);
            
this.richTextBox1.TabIndex = 11;
            
this.richTextBox1.Text = "";
            
// 
            
// groupBox1
            
// 
            this.groupBox1.Controls.Add(this.textBox6);
            
this.groupBox1.Controls.Add(this.textBox4);
            
this.groupBox1.Controls.Add(this.label4);
            
this.groupBox1.Controls.Add(this.label6);
            
this.groupBox1.Controls.Add(this.button5);
            
this.groupBox1.Location = new System.Drawing.Point(3688);
            
this.groupBox1.Name = "groupBox1";
            
this.groupBox1.Size = new System.Drawing.Size(136152);
            
this.groupBox1.TabIndex = 13;
            
this.groupBox1.TabStop = false;
            
this.groupBox1.Text = "连接服务器";
            
// 
            
// textBox6
            
// 
            this.textBox6.Location = new System.Drawing.Point(8080);
            
this.textBox6.Name = "textBox6";
            
this.textBox6.Size = new System.Drawing.Size(4821);
            
this.textBox6.TabIndex = 5;
            
this.textBox6.Text = "";
            
// 
            
// label6
            
// 
            this.label6.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            
this.label6.Location = new System.Drawing.Point(880);
            
this.label6.Name = "label6";
            
this.label6.Size = new System.Drawing.Size(6423);
            
this.label6.TabIndex = 7;
            
this.label6.Text = "目标端口:";
            
this.label6.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
            
// 
            
// button5
            
// 
            this.button5.Location = new System.Drawing.Point(8120);
            
this.button5.Name = "button5";
            
this.button5.Size = new System.Drawing.Size(6423);
            
this.button5.TabIndex = 8;
            
this.button5.Text = "请求连接";
            
this.button5.Click += new System.EventHandler(this.button5_Click);
            
// 
            
// label5
            
// 
            this.label5.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            
this.label5.Location = new System.Drawing.Point(816);
            
this.label5.Name = "label5";
            
this.label5.Size = new System.Drawing.Size(6423);
            
this.label5.TabIndex = 7;
            
this.label5.Text = "监听端口:";
            
this.label5.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
            
// 
            
// textBox5
            
// 
            this.textBox5.Location = new System.Drawing.Point(8016);
            
this.textBox5.Name = "textBox5";
            
this.textBox5.Size = new System.Drawing.Size(4821);
            
this.textBox5.TabIndex = 5;
            
this.textBox5.Text = "";
            
// 
            
// groupBox2
            
// 
            this.groupBox2.Controls.Add(this.textBox1);
            
this.groupBox2.Controls.Add(this.textBox2);
            
this.groupBox2.Controls.Add(this.label1);
            
this.groupBox2.Controls.Add(this.button1);
            
this.groupBox2.Controls.Add(this.label2);
            
this.groupBox2.Location = new System.Drawing.Point(368288);
            
this.groupBox2.Name = "groupBox2";
            
this.groupBox2.Size = new System.Drawing.Size(136128);
            
this.groupBox2.TabIndex = 14;
            
this.groupBox2.TabStop = false;
            
this.groupBox2.Text = "本机IP";
            
// 
            
// statusBar1
            
// 
            this.statusBar1.Location = new System.Drawing.Point(0422);
            
this.statusBar1.Name = "statusBar1";
            
this.statusBar1.Size = new System.Drawing.Size(51216);
            
this.statusBar1.TabIndex = 15;
            
this.statusBar1.TextChanged += new System.EventHandler(this.statusBar1_TextChanged);
            
// 
            
// groupBox4
            
// 
            this.groupBox4.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
            
this.groupBox4.Controls.Add(this.textBox3);
            
this.groupBox4.Controls.Add(this.button4);
            
this.groupBox4.Controls.Add(this.richTextBox1);
            
this.groupBox4.Controls.Add(this.label3);
            
this.groupBox4.Controls.Add(this.button2);
            
this.groupBox4.Location = new System.Drawing.Point(8272);
            
this.groupBox4.Name = "groupBox4";
            
this.groupBox4.Size = new System.Drawing.Size(352144);
            
this.groupBox4.TabIndex = 17;
            
this.groupBox4.TabStop = false;
            
this.groupBox4.Text = "发送窗口";
            
// 
            
// button4
            
// 
            this.button4.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
            
this.button4.Location = new System.Drawing.Point(8112);
            
this.button4.Name = "button4";
            
this.button4.Size = new System.Drawing.Size(6423);
            
this.button4.TabIndex = 12;
            
this.button4.Text = "清空消息";
            
this.button4.Click += new System.EventHandler(this.button4_Click);
            
// 
            
// groupBox3
            
// 
            this.groupBox3.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
                
| System.Windows.Forms.AnchorStyles.Right)));
            
this.groupBox3.Controls.Add(this.richTextBox2);
            
this.groupBox3.Location = new System.Drawing.Point(88);
            
this.groupBox3.Name = "groupBox3";
            
this.groupBox3.Size = new System.Drawing.Size(352264);
            
this.groupBox3.TabIndex = 18;
            
this.groupBox3.TabStop = false;
            
this.groupBox3.Text = "聊天记录";
            
// 
            
// richTextBox2
            
// 
            this.richTextBox2.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
                
| System.Windows.Forms.AnchorStyles.Left) 
                
| System.Windows.Forms.AnchorStyles.Right)));
            
this.richTextBox2.Location = new System.Drawing.Point(816);
            
this.richTextBox2.Name = "richTextBox2";
            
this.richTextBox2.Size = new System.Drawing.Size(336240);
            
this.richTextBox2.TabIndex = 0;
            
this.richTextBox2.Text = "";
            
// 
            
// groupBox5
            
// 
            this.groupBox5.Controls.Add(this.label5);
            
this.groupBox5.Controls.Add(this.textBox5);
            
this.groupBox5.Controls.Add(this.button3);
            
this.groupBox5.Location = new System.Drawing.Point(368184);
            
this.groupBox5.Name = "groupBox5";
            
this.groupBox5.Size = new System.Drawing.Size(13680);
            
this.groupBox5.TabIndex = 19;
            
this.groupBox5.TabStop = false;
            
this.groupBox5.Text = "监听设置";
            
// 
            
// Form1
            
// 
            this.AutoScaleBaseSize = new System.Drawing.Size(614);
            
this.ClientSize = new System.Drawing.Size(512438);
            
this.Controls.Add(this.groupBox5);
            
this.Controls.Add(this.groupBox3);
            
this.Controls.Add(this.groupBox4);
            
this.Controls.Add(this.statusBar1);
            
this.Controls.Add(this.groupBox1);
            
this.Controls.Add(this.groupBox2);
            
this.MaximumSize = new System.Drawing.Size(520472);
            
this.MinimumSize = new System.Drawing.Size(520472);
            
this.Name = "Form1";
            
this.Text = "点对点聊天";
            
this.Closing += new System.ComponentModel.CancelEventHandler(this.Form1_Closing);
            
this.groupBox1.ResumeLayout(false);
            
this.groupBox2.ResumeLayout(false);
            
this.groupBox4.ResumeLayout(false);
            
this.groupBox3.ResumeLayout(false);
            
this.groupBox5.ResumeLayout(false);
            
this.ResumeLayout(false);

        }
        
#endregion

        
/// <summary>
        
/// 应用程序的主入口点。
        
/// </summary>
        [STAThread]
        
static void Main() 
        {
            Application.Run(
new Form1());
        }

        
private void listenstart()//监听发入的信息
        {
            
try
            {
                
while(this.socket1.Connected)
                {                    
                    
//设置一个缓冲区
                    Byte[] stream=new Byte[1024];
                    socket1.Receive(stream);
                    
//将获得的流转化为字符串类型
                    string message=Encoding.Default.GetString(stream);
                    
//this.textBox1.Text=socket1.Available.ToString();
                    this.richTextBox2.AppendText(message);
                    
this.richTextBox2.AppendText(" ");
                }                
            }
            
catch//(Exception error)
            {
                
if(!this.socket1.Connected)
                {
                    socket1.Close();
                    button3.Enabled
=true;
                    button5.Enabled
=true;
                }            
            }
        }
        
private void button1_Click(object sender, System.EventArgs e)
        {
            
//获取本地主机名称
            string host=Dns.GetHostName();
            
this.textBox1.Text=host;
            
            
//获取本机IP
            IPAddress[] addrs = Dns.Resolve("localhost").AddressList;
            IPAddress addr 
= Dns.Resolve(host).AddressList[0];
            
//转化为标准的以点分隔的四部分格式
            this.textBox2.Text=addr.ToString();
        }

        
private void button3_Click(object sender, System.EventArgs e)
        {
            
//获得监听端口
            int hostport;
            
try
            {                    
                hostport
=Int32.Parse(this.textBox5.Text);
                
if(hostport<135||hostport>65400)hostport=12800;
            }
            
catch
            {
                hostport
=12800;
            }                
            
//IPAddress ipAddress = Dns.Resolve("localhost").AddressList[0];
            IPAddress ipAddress=IPAddress.Parse("0.0.0.0");    
            lep 
= new IPEndPoint(ipAddress,hostport);
            socket1
=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
            
try
            {
                socket1.Bind(lep);
                socket1.Listen(
10000);
                
this.statusBar1.Text="等待连接...";
                button3.Enabled
=false;
                button5.Enabled
=false;
                Thread watt
=new Thread(new ThreadStart(waits));
                watt.Start();
                
            }
            
catch
            {
                button3.Enabled
=true;
            }
            
        }
        
private void waits()
        {
            
try
            {
                socket1
=socket1.Accept();
                
this.statusBar1.Text="已建立连接";
                listenthread
=new Thread(new ThreadStart(listenstart));
                listenthread.Start();
                button3.Enabled
=false;
                button5.Enabled
=false;
            }
            
catch
            {
                button3.Enabled
=true;
                button5.Enabled
=true;
            }

        }

        
private void statusBar1_TextChanged(object sender, System.EventArgs e)
        {
            
        }

        
private void button2_Click(object sender, System.EventArgs e)
        {
            
if(socket1.Connected)
            {
                
//将发送的字符串转换成字节数组
                msg = "<"+this.textBox3.Text+">"+this.richTextBox1.Text;
                Byte[] bytes
=Encoding.Default.GetBytes(msg);
                
//发送数组
                try
                {
                    socket1.Send(bytes,bytes.Length,SocketFlags.None);
                    
this.richTextBox1.Text="";
                }
                
catch
                {
                }                
                
//this.richTextBox2.AppendText(msg);
            }
        }

        

        
private void button4_Click(object sender, System.EventArgs e)
        {
            
this.richTextBox2.Text="";            
        }

        
private void button5_Click(object sender, System.EventArgs e)
        {
            
//获得连接端口
            int hostport;
            
try
            {                    
                hostport
=Int32.Parse(this.textBox6.Text);
                
if(hostport<135||hostport>65400)hostport=12800;
            }
            
catch
            {
                hostport
=30000;
            }
            
            
try
            {
                
//得到需连接的地址
                lep = new IPEndPoint(IPAddress.Parse(this.textBox4.Text),hostport);                    
            }
            
catch(Exception err)
            {
                MessageBox.Show(err.Message);
            }
            
//构造socket1实例,并请求连接
            socket1= new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
            
try
            {
                socket1.Connect(lep);
                
if(socket1.Connected)this.statusBar1.Text="连接成功";
                
//开始监听
                listenthread=new Thread(new ThreadStart(listenstart));
                listenthread.Start();
                button5.Enabled
=false;
                button3.Enabled
=false;
            }
            
catch
            {
                button5.Enabled
=true;
                button3.Enabled
=true;
            }
        }

        
private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {            
            
try
            {
                socket1.Close();
                
if (this.listenthread!=null)
                {
                    
//如果线程还处于运行状态就关闭它
                    if (this.listenthread.ThreadState==ThreadState.Running)
                    {
                        
this.listenthread.Abort();
                    }
                }
            }
            
catch
            {
            }

        }

        
    }
}
 
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