点对点聊天程序

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(8, 16);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(64, 23);
            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(80, 16);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(40, 23);
            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(8, 48);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(112, 21);
            this.textBox1.TabIndex = 2;
            this.textBox1.Text = "";
            // 
            // label2
            // 
            this.label2.Location = new System.Drawing.Point(8, 72);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(64, 23);
            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(8, 96);
            this.textBox2.Name = "textBox2";
            this.textBox2.Size = new System.Drawing.Size(112, 21);
            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(80, 112);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(64, 23);
            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(136, 112);
            this.textBox3.Name = "textBox3";
            this.textBox3.Size = new System.Drawing.Size(128, 21);
            this.textBox3.TabIndex = 4;
            this.textBox3.Text = "";
            // 
            // textBox4
            // 
            this.textBox4.Location = new System.Drawing.Point(8, 48);
            this.textBox4.Name = "textBox4";
            this.textBox4.Size = new System.Drawing.Size(120, 21);
            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(272, 112);
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size(72, 23);
            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(8, 16);
            this.label4.Name = "label4";
            this.label4.Size = new System.Drawing.Size(120, 23);
            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(8, 48);
            this.button3.Name = "button3";
            this.button3.Size = new System.Drawing.Size(64, 23);
            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(8, 16);
            this.richTextBox1.MaxLength = 1000;
            this.richTextBox1.Name = "richTextBox1";
            this.richTextBox1.Size = new System.Drawing.Size(336, 88);
            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(368, 8);
            this.groupBox1.Name = "groupBox1";
            this.groupBox1.Size = new System.Drawing.Size(136, 152);
            this.groupBox1.TabIndex = 13;
            this.groupBox1.TabStop = false;
            this.groupBox1.Text = "连接服务器";
            // 
            // textBox6
            // 
            this.textBox6.Location = new System.Drawing.Point(80, 80);
            this.textBox6.Name = "textBox6";
            this.textBox6.Size = new System.Drawing.Size(48, 21);
            this.textBox6.TabIndex = 5;
            this.textBox6.Text = "";
            // 
            // label6
            // 
            this.label6.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.label6.Location = new System.Drawing.Point(8, 80);
            this.label6.Name = "label6";
            this.label6.Size = new System.Drawing.Size(64, 23);
            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(8, 120);
            this.button5.Name = "button5";
            this.button5.Size = new System.Drawing.Size(64, 23);
            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(8, 16);
            this.label5.Name = "label5";
            this.label5.Size = new System.Drawing.Size(64, 23);
            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(80, 16);
            this.textBox5.Name = "textBox5";
            this.textBox5.Size = new System.Drawing.Size(48, 21);
            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(368, 288);
            this.groupBox2.Name = "groupBox2";
            this.groupBox2.Size = new System.Drawing.Size(136, 128);
            this.groupBox2.TabIndex = 14;
            this.groupBox2.TabStop = false;
            this.groupBox2.Text = "本机IP";
            // 
            // statusBar1
            // 
            this.statusBar1.Location = new System.Drawing.Point(0, 422);
            this.statusBar1.Name = "statusBar1";
            this.statusBar1.Size = new System.Drawing.Size(512, 16);
            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(8, 272);
            this.groupBox4.Name = "groupBox4";
            this.groupBox4.Size = new System.Drawing.Size(352, 144);
            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(8, 112);
            this.button4.Name = "button4";
            this.button4.Size = new System.Drawing.Size(64, 23);
            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(8, 8);
            this.groupBox3.Name = "groupBox3";
            this.groupBox3.Size = new System.Drawing.Size(352, 264);
            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(8, 16);
            this.richTextBox2.Name = "richTextBox2";
            this.richTextBox2.Size = new System.Drawing.Size(336, 240);
            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(368, 184);
            this.groupBox5.Name = "groupBox5";
            this.groupBox5.Size = new System.Drawing.Size(136, 80);
            this.groupBox5.TabIndex = 19;
            this.groupBox5.TabStop = false;
            this.groupBox5.Text = "监听设置";
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(512, 438);
            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(520, 472);
            this.MinimumSize = new System.Drawing.Size(520, 472);
            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
            {
            }

        }

        
    }
}