.net 中使用socket （c#）

前几天在网上看到关于使用socket 编写聊天程序的一个例子，学习了一下，网上的例子是VB.NET的，自己改写成了C#的大同小异，只作为记录：

发送端
================================

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

namespace CSClientTest

{

///<summary>

/// sendform 的摘要说明。

///</summary>

public class sendform : System.Windows.Forms.Form

{

private System.Windows.Forms.TextBox textBox1;

private System.Windows.Forms.Button button1;

private System.Windows.Forms.Label label1;

///<summary>

///必需的设计器变量。

///</summary>

private System.ComponentModel.Container components = null;

public sendform()

{

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

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

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

this.SuspendLayout();

// textBox1

this.textBox1.Location = new System.Drawing.Point(96, 144);

this.textBox1.Name = "textBox1";

this.textBox1.Size = new System.Drawing.Size(200, 21);

this.textBox1.TabIndex = 0;

this.textBox1.Text = "";

// button1

this.button1.Location = new System.Drawing.Point(320, 144);

this.button1.Name = "button1";

this.button1.TabIndex = 1;

this.button1.Text = "sender";

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

// label1

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

this.label1.Name = "label1";

this.label1.Size = new System.Drawing.Size(608, 112);

this.label1.TabIndex = 2;

// sendform

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

this.ClientSize = new System.Drawing.Size(616, 238);

this.Controls.Add(this.label1);

this.Controls.Add(this.button1);

this.Controls.Add(this.textBox1);

this.Name = "sendform";

this.Text = "sendform";

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

this.ResumeLayout(false);

}

#endregion

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

{

}

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

{

//定义一个socket对象

System.Net.Sockets.Socket socket= new System.Net.Sockets.Socket(System.Net.Sockets.AddressFamily.InterNetwork,System.Net.Sockets.SocketType.Stream,System.Net.Sockets.ProtocolType.Tcp);

//定义一个字节数组

byte[] b = new byte[1024];

//从文本框中获得数据转换为字节数组后存入b

b=System.Text.Encoding.UTF8.GetBytes(textBox1.Text);

//定义目的端的IP和端口

System.Net.IPEndPoint ep = new System.Net.IPEndPoint(System.Net.IPAddress.Parse("127.0.0.1"),1022);

try

{

//连接到目的端

socket.Connect(ep);

//用socket的send方法发送数据，该方法返回发送的数据的字节数

label1.Text="数据已发送，总共："+socket.Send(b).ToString()+"字节";

//禁止并关闭socket

socket.Shutdown(System.Net.Sockets.SocketShutdown.Both);

socket.Close();

}

catch(System.Exception ex)

{

label1.Text=ex.Message.ToString();

}

接收端
================================

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

namespace CSClientTest

{

///<summary>

/// receive 的摘要说明。

///</summary>

public class receive : System.Windows.Forms.Form

{

private System.Windows.Forms.Button button1;

private System.Windows.Forms.TextBox textBox1;

///<summary>

///必需的设计器变量。

///</summary>

private System.ComponentModel.Container components = null;

//定义一个全局的socket以便监听和接收数据

System.Net.Sockets.Socket socket = new System.Net.Sockets.Socket(System.Net.Sockets.AddressFamily.InterNetwork,System.Net.Sockets.SocketType.Stream,System.Net.Sockets.ProtocolType.Tcp);

public receive()

{

// 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 )