c#点对点聊天程序示例-白红宇

2007-11-22 16:07

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.Net.Sockets;

using System.Net;

using System.IO;

using System.Text;

using System.Threading;

namespace WindowsApplication1

{

/// <summary>

/// Form1 的摘要说明。

/// </summary>

public class Form1 : System.Windows.Forms.Form

{

private System.Windows.Forms.Label label3;

private System.Windows.Forms.Label label4;

private System.Windows.Forms.Label label5;

private System.Windows.Forms.Label label6;

private System.Windows.Forms.Label label7;

private System.Windows.Forms.Label label8;

private System.Windows.Forms.TextBox textBox1;

private System.Windows.Forms.TextBox textBox2;

private System.Windows.Forms.TextBox textBox3;

private System.Windows.Forms.ListBox listBox1;

private System.Windows.Forms.ListBox listBox2;

private System.Windows.Forms.Button button1;

private System.Windows.Forms.Button button2;

private System.Windows.Forms.Button button3;

private System.Windows.Forms.Button button4;

private System.Windows.Forms.TextBox textBox4;

private System.Windows.Forms.Label label1;

private System.Windows.Forms.StatusBar statusBar1;

private System.Windows.Forms.StatusBarPanel statusBarPanel1;

private System.Windows.Forms.StatusBarPanel statusBarPanel2;

private System.ComponentModel.Container components = null;

/// <summary>

/// 必需的设计器变量。

/// </summary>

//创建线程用来侦听端口号

private Thread th;

//用来侦听端口号

private TcpListener tlListen1;

//设置标志位，判断侦听状态

private bool listenerRun = true;

//创建传送接收的基本数据流实例

private NetworkStream tcpStream;

//创建向远程机器传送信息实例

private StreamWriter reqStreamW;

//创建远程连接的实例

private TcpClient tcpc;

//创建接收远程主机传来的数据的实例

private Socket skSocket;

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 )

{

try

{

listenerRun = false;

th.Abort();

th = null;

tlListen1.Stop();

skSocket.Close();

}

catch(Exception)

{

}

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.label3 = new System.Windows.Forms.Label();

this.label4 = new System.Windows.Forms.Label();

this.label5 = new System.Windows.Forms.Label();

this.label6 = new System.Windows.Forms.Label();

this.label7 = new System.Windows.Forms.Label();

this.label8 = new System.Windows.Forms.Label();

this.textBox1 = new System.Windows.Forms.TextBox();

this.textBox2 = new System.Windows.Forms.TextBox();

this.textBox3 = new System.Windows.Forms.TextBox();

this.listBox1 = new System.Windows.Forms.ListBox();

this.listBox2 = new System.Windows.Forms.ListBox();

this.button1 = new System.Windows.Forms.Button();

this.button2 = new System.Windows.Forms.Button();

this.button3 = new System.Windows.Forms.Button();

this.button4 = new System.Windows.Forms.Button();

this.textBox4 = new System.Windows.Forms.TextBox();

this.label1 = new System.Windows.Forms.Label();

this.statusBar1 = new System.Windows.Forms.StatusBar();

this.statusBarPanel1 = new System.Windows.Forms.StatusBarPanel();

this.statusBarPanel2 = new System.Windows.Forms.StatusBarPanel();

((System.ComponentModel.ISupportInitialize)(this.statusBarPanel1)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this.statusBarPanel2)).BeginInit();

this.SuspendLayout();

// label3

this.label3.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(192)), ((System.Byte)(255)));

this.label3.Location = new System.Drawing.Point(24, 120);

this.label3.Name = "label3";

this.label3.Size = new System.Drawing.Size(72, 23);

this.label3.TabIndex = 2;

this.label3.Text = "发送信息：";

// label4

this.label4.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(192)), ((System.Byte)(255)));

this.label4.Location = new System.Drawing.Point(24, 312);

this.label4.Name = "label4";

this.label4.Size = new System.Drawing.Size(72, 23);

this.label4.TabIndex = 3;

this.label4.Text = "接收信息";

// label5

this.label5.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(192)), ((System.Byte)(255)));

this.label5.Location = new System.Drawing.Point(24, 184);

this.label5.Name = "label5";

this.label5.Size = new System.Drawing.Size(72, 23);

this.label5.TabIndex = 4;

this.label5.Text = "发送的信息";

// label6

this.label6.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(192)), ((System.Byte)(255)));

this.label6.Location = new System.Drawing.Point(248, 88);

this.label6.Name = "label6";

this.label6.Size = new System.Drawing.Size(56, 23);

this.label6.TabIndex = 5;

this.label6.Text = "本地端口";

// label7

this.label7.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(192)), ((System.Byte)(255)));

this.label7.ForeColor = System.Drawing.Color.Black;

this.label7.Location = new System.Drawing.Point(24, 32);

this.label7.Name = "label7";

this.label7.Size = new System.Drawing.Size(72, 23);

this.label7.TabIndex = 0;

this.label7.Text = "远程IP地址";

// label8

this.label8.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(192)), ((System.Byte)(255)));

this.label8.Location = new System.Drawing.Point(24, 88);

this.label8.Name = "label8";

this.label8.Size = new System.Drawing.Size(72, 23);

this.label8.TabIndex = 1;

this.label8.Text = "远程端口号";

// textBox1

this.textBox1.Location = new System.Drawing.Point(128, 32);

this.textBox1.Name = "textBox1";

this.textBox1.Size = new System.Drawing.Size(264, 21);

this.textBox1.TabIndex = 6;

this.textBox1.Text = "textBox1";

// textBox2

this.textBox2.Location = new System.Drawing.Point(128, 88);

this.textBox2.Name = "textBox2";

this.textBox2.TabIndex = 7;

this.textBox2.Text = "textBox2";

// textBox3

this.textBox3.Location = new System.Drawing.Point(312, 88);

this.textBox3.Name = "textBox3";

this.textBox3.Size = new System.Drawing.Size(80, 21);

this.textBox3.TabIndex = 8;

this.textBox3.Text = "textBox3";

// listBox1

this.listBox1.ItemHeight = 12;

this.listBox1.Location = new System.Drawing.Point(128, 160);

this.listBox1.Name = "listBox1";

this.listBox1.Size = new System.Drawing.Size(264, 112);

this.listBox1.TabIndex = 9;

// listBox2

this.listBox2.ItemHeight = 12;

this.listBox2.Location = new System.Drawing.Point(128, 296);

this.listBox2.Name = "listBox2";

this.listBox2.Size = new System.Drawing.Size(264, 112);

this.listBox2.TabIndex = 10;

// button1

this.button1.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(255)), ((System.Byte)(128)));

this.button1.ForeColor = System.Drawing.Color.Red;

this.button1.Location = new System.Drawing.Point(408, 40);

this.button1.Name = "button1";

this.button1.Size = new System.Drawing.Size(120, 40);

this.button1.TabIndex = 11;

this.button1.Text = "连接远程主机";

this.button1.Click += new System.EventHandler(this.button1_Click);

// button2

this.button2.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(255)), ((System.Byte)(128)));

this.button2.ForeColor = System.Drawing.Color.Red;

this.button2.Location = new System.Drawing.Point(408, 144);

this.button2.Name = "button2";

this.button2.Size = new System.Drawing.Size(120, 40);

this.button2.TabIndex = 12;

this.button2.Text = "侦听端口";

this.button2.Click += new System.EventHandler(this.button2_Click);

// button3

this.button3.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(255)), ((System.Byte)(128)));

this.button3.ForeColor = System.Drawing.Color.Red;

this.button3.Location = new System.Drawing.Point(408, 240);

this.button3.Name = "button3";

this.button3.Size = new System.Drawing.Size(120, 40);

this.button3.TabIndex = 13;

this.button3.Text = "发送信息";

this.button3.Click += new System.EventHandler(this.button3_Click);

// button4

this.button4.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(255)), ((System.Byte)(255)), ((System.Byte)(128)));

this.button4.ForeColor = System.Drawing.Color.Red;

this.button4.Location = new System.Drawing.Point(408, 352);

this.button4.Name = "button4";

this.button4.Size = new System.Drawing.Size(120, 40);

this.button4.TabIndex = 14;

this.button4.Text = "断开连接";

this.button4.Click += new System.EventHandler(this.button4_Click);

// textBox4

this.textBox4.Location = new System.Drawing.Point(128, 120);

this.textBox4.Name = "textBox4";

this.textBox4.Size = new System.Drawing.Size(264, 21);

this.textBox4.TabIndex = 15;

this.textBox4.Text = "textBox4";

// label1

this.label1.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(192)), ((System.Byte)(192)), ((System.Byte)(255)));

this.label1.Location = new System.Drawing.Point(0, 0);

this.label1.Name = "label1";

this.label1.Size = new System.Drawing.Size(544, 23);

this.label1.TabIndex = 16;

// statusBar1

this.statusBar1.Location = new System.Drawing.Point(0, 429);

this.statusBar1.Name = "statusBar1";

this.statusBar1.Panels.AddRange(new System.Windows.Forms.StatusBarPanel[] {

this.statusBarPanel1,

this.statusBarPanel2});

this.statusBar1.ShowPanels = true;

this.statusBar1.Size = new System.Drawing.Size(544, 96);

this.statusBar1.TabIndex = 17;

this.statusBar1.Text = "statusBar1";

// statusBarPanel1

this.statusBarPanel1.Text = "statusBarPanel1";

this.statusBarPanel1.Width = 260;

// statusBarPanel2

this.statusBarPanel2.Text = "statusBarPanel2";

this.statusBarPanel2.Width = 260;

// Form1

this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);

this.BackColor = System.Drawing.Color.Black;

this.ClientSize = new System.Drawing.Size(544, 525);

this.Controls.Add(this.statusBar1);

this.Controls.Add(this.label1);

this.Controls.Add(this.textBox4);

this.Controls.Add(this.button4);

this.Controls.Add(this.button3);

this.Controls.Add(this.button2);

this.Controls.Add(this.button1);

this.Controls.Add(this.listBox2);

this.Controls.Add(this.listBox1);

this.Controls.Add(this.textBox3);

this.Controls.Add(this.textBox2);

this.Controls.Add(this.textBox1);

this.Controls.Add(this.label6);

this.Controls.Add(this.label5);

this.Controls.Add(this.label4);

this.Controls.Add(this.label3);

this.Controls.Add(this.label7);

this.Controls.Add(this.label8);

this.Name = "Form1";

this.Text = "点对点通讯程序";

this.Load += new System.EventHandler(this.Form1_Load);

((System.ComponentModel.ISupportInitialize)(this.statusBarPanel1)).EndInit();

((System.ComponentModel.ISupportInitialize)(this.statusBarPanel2)).EndInit();

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 Listen()

{

string time = DateTime.Now.ToString();

try

{

tlListen1 = new TcpListener(Int32.Parse(textBox3.Text));

//侦听远程端口

tlListen1.Start();

statusBar1.Panels[1].Text = "正在监听......";

skSocket = tlListen1.AcceptSocket();

//获得远程计算机对应的网络远程终结点

EndPoint tempRemoteEP = skSocket.RemoteEndPoint;

//根据网络远程终结点获得远程计算机的名称

IPEndPoint tempRemoteIP = (IPEndPoint)tempRemoteEP;

IPHostEntry host = Dns.GetHostByAddress(tempRemoteIP.Address);

string HostName = host.HostName;

statusBar1.Panels[1].Text = "'"+HostName+"'"+"远程计算机正确连接！";

//循环侦听

while(listenerRun)

{

//定义从远程计算机接收到的数据存放缓冲区

Byte[]stream = new byte[80];

//获取当前时间

//接收数据并存放到定义的缓冲区,以指定的编码，从缓冲区中解析出内容

int i = skSocket.ReceiveFrom(stream,ref tempRemoteEP);

string sMessage = System.Text.Encoding.UTF8.GetString(stream);

//显示接收的数据

listBox2.Items.Add(time+""+HostName+":");

listBox2.Items.Add(sMessage);

}

catch(System.Security.SecurityException)

{

MessageBox.Show("防火墙安全错误！","错误",MessageBoxButtons.OK,MessageBoxIcon.Exclamation);

}

private void button1_Click(object sender, System.EventArgs e)

{

//向远程主机提出申请，如果连接建立，则获得用以传送数据的数据流

try

{

tcpc = new TcpClient(textBox1.Text,Int32.Parse(textBox2.Text));

tcpStream = tcpc.GetStream();

statusBar1.Panels[0].Text = "成功连接远程计算机!";

button2.Enabled = true;

button1.Enabled = false;

button4.Enabled = true;

}

catch(Exception)

{

statusBar1.Panels[0].Text = "目标计算机拒绝连接请求！";

}

private void button2_Click(object sender, System.EventArgs e)

{

th = new Thread(new ThreadStart(Listen));

th.Start();

}

private void button3_Click(object sender, System.EventArgs e)

{

try

{

string sMsg= textBox4.Text;

string MyName = Dns.GetHostName();

reqStreamW = new StreamWriter(tcpStream);

reqStreamW.Write(sMsg);

reqStreamW.Flush();

string time = DateTime.Now.ToString();

listBox1.Items.Add(time+" " + MyName+":");

listBox1.Items.Add(sMsg);

textBox4.Clear();

}

catch(Exception)

{

statusBar1.Panels[0].Text= "无法发送到目标计算机！";

}

private void button4_Click(object sender, System.EventArgs e)

{

listenerRun = false;

tcpc.Close();

statusBar1.Panels[0].Text = "断开连接！";

button1.Enabled = true;

button3.Enabled = false;

button2.Enabled = true;

}

private void Form1_Load(object sender, System.EventArgs e)

{

}

本文转自悬魂博客园博客，原文链接：http://www.cnblogs.com/xuanhun/archive/2010/02/03/1662417.html，如需转载请自行联系原作者