WEB邮件程序

开发平台：
C#

Form1.cs：源码内容
							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.Text;
namespace POP3Server
{
	/// <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.Label label2;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.CheckBox checkBox1;
		private System.Windows.Forms.GroupBox groupBox2;
        //添加公有数据成员
		public TcpClient Server;
        public NetworkStream NetStrm;
		public StreamReader RdStrm;
		public string Data;
		public byte[] szData;
		
		private System.Windows.Forms.TextBox txtPopServer;
		private System.Windows.Forms.TextBox txtUsername;
		private System.Windows.Forms.TextBox txtPassword;
		private System.Windows.Forms.Button btnConnect;
		private System.Windows.Forms.Button btnDisConnect;
		private System.Windows.Forms.TextBox txtMailNum;
		private System.Windows.Forms.Button btnRetrieve;
		private System.Windows.Forms.RichTextBox rtbMessage;
		private System.Windows.Forms.ListBox Status;
		/// <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.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.txtPopServer = new System.Windows.Forms.TextBox();
			this.txtUsername = new System.Windows.Forms.TextBox();
			this.txtPassword = new System.Windows.Forms.TextBox();
			this.btnConnect = new System.Windows.Forms.Button();
			this.btnDisConnect = new System.Windows.Forms.Button();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.rtbMessage = new System.Windows.Forms.RichTextBox();
			this.label4 = new System.Windows.Forms.Label();
			this.txtMailNum = new System.Windows.Forms.TextBox();
			this.checkBox1 = new System.Windows.Forms.CheckBox();
			this.btnRetrieve = new System.Windows.Forms.Button();
			this.groupBox2 = new System.Windows.Forms.GroupBox();
			this.Status = new System.Windows.Forms.ListBox();
			this.groupBox1.SuspendLayout();
			this.groupBox2.SuspendLayout();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(16, 16);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(112, 23);
			this.label1.TabIndex = 0;
			this.label1.Text = "POP3服务器地址:";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(16, 48);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(112, 23);
			this.label2.TabIndex = 1;
			this.label2.Text = "用户名:";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(16, 80);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(112, 23);
			this.label3.TabIndex = 2;
			this.label3.Text = "密 码:";
			// 
			// txtPopServer
			// 
			this.txtPopServer.Location = new System.Drawing.Point(120, 16);
			this.txtPopServer.Name = "txtPopServer";
			this.txtPopServer.Size = new System.Drawing.Size(192, 21);
			this.txtPopServer.TabIndex = 3;
			this.txtPopServer.Text = "pop.126.com";
			// 
			// txtUsername
			// 
			this.txtUsername.Location = new System.Drawing.Point(120, 48);
			this.txtUsername.Name = "txtUsername";
			this.txtUsername.Size = new System.Drawing.Size(192, 21);
			this.txtUsername.TabIndex = 4;
			this.txtUsername.Text = "hrk11111";
			// 
			// txtPassword
			// 
			this.txtPassword.Location = new System.Drawing.Point(120, 80);
			this.txtPassword.Name = "txtPassword";
			this.txtPassword.PasswordChar = '*';
			this.txtPassword.Size = new System.Drawing.Size(192, 21);
			this.txtPassword.TabIndex = 5;
			this.txtPassword.Text = "19831022";
			// 
			// btnConnect
			// 
			this.btnConnect.Location = new System.Drawing.Point(120, 120);
			this.btnConnect.Name = "btnConnect";
			this.btnConnect.TabIndex = 6;
			this.btnConnect.Text = "连接";
			this.btnConnect.Click += new System.EventHandler(this.btnConnect_Click);
			// 
			// btnDisConnect
			// 
			this.btnDisConnect.Location = new System.Drawing.Point(240, 120);
			this.btnDisConnect.Name = "btnDisConnect";
			this.btnDisConnect.TabIndex = 7;
			this.btnDisConnect.Text = "断开连接";
			this.btnDisConnect.Click += new System.EventHandler(this.btnDisConnect_Click);
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.Add(this.rtbMessage);
			this.groupBox1.Location = new System.Drawing.Point(16, 320);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(400, 136);
			this.groupBox1.TabIndex = 8;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "信息:";
			// 
			// rtbMessage
			// 
			this.rtbMessage.Location = new System.Drawing.Point(0, 16);
			this.rtbMessage.Name = "rtbMessage";
			this.rtbMessage.Size = new System.Drawing.Size(400, 120);
			this.rtbMessage.TabIndex = 0;
			this.rtbMessage.Text = "";
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(16, 288);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(72, 23);
			this.label4.TabIndex = 9;
			this.label4.Text = "邮件编号";
			// 
			// txtMailNum
			// 
			this.txtMailNum.Location = new System.Drawing.Point(104, 288);
			this.txtMailNum.Name = "txtMailNum";
			this.txtMailNum.Size = new System.Drawing.Size(32, 21);
			this.txtMailNum.TabIndex = 10;
			this.txtMailNum.Text = "1";
			// 
			// checkBox1
			// 
			this.checkBox1.Checked = true;
			this.checkBox1.CheckState = System.Windows.Forms.CheckState.Checked;
			this.checkBox1.Location = new System.Drawing.Point(160, 288);
			this.checkBox1.Name = "checkBox1";
			this.checkBox1.Size = new System.Drawing.Size(136, 24);
			this.checkBox1.TabIndex = 11;
			this.checkBox1.Text = "在服务器上保留备份";
			// 
			// btnRetrieve
			// 
			this.btnRetrieve.Location = new System.Drawing.Point(336, 288);
			this.btnRetrieve.Name = "btnRetrieve";
			this.btnRetrieve.TabIndex = 12;
			this.btnRetrieve.Text = "收取邮件";
			this.btnRetrieve.Click += new System.EventHandler(this.btnRetrieve_Click);
			// 
			// groupBox2
			// 
			this.groupBox2.Controls.Add(this.Status);
			this.groupBox2.Location = new System.Drawing.Point(16, 152);
			this.groupBox2.Name = "groupBox2";
			this.groupBox2.Size = new System.Drawing.Size(400, 128);
			this.groupBox2.TabIndex = 13;
			this.groupBox2.TabStop = false;
			this.groupBox2.Text = "状态:";
			// 
			// Status
			// 
			this.Status.ItemHeight = 12;
			this.Status.Location = new System.Drawing.Point(0, 16);
			this.Status.Name = "Status";
			this.Status.Size = new System.Drawing.Size(400, 100);
			this.Status.TabIndex = 0;
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.AutoScroll = true;
			this.ClientSize = new System.Drawing.Size(424, 462);
			this.Controls.Add(this.groupBox2);
			this.Controls.Add(this.btnRetrieve);
			this.Controls.Add(this.checkBox1);
			this.Controls.Add(this.txtMailNum);
			this.Controls.Add(this.label4);
			this.Controls.Add(this.groupBox1);
			this.Controls.Add(this.btnDisConnect);
			this.Controls.Add(this.btnConnect);
			this.Controls.Add(this.txtPassword);
			this.Controls.Add(this.txtUsername);
			this.Controls.Add(this.txtPopServer);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.label1);
			this.HelpButton = true;
			this.MaximizeBox = false;
			this.Name = "Form1";
			this.Text = "POP3服务器";
			this.TopMost = true;
			this.groupBox1.ResumeLayout(false);
			this.groupBox2.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 btnConnect_Click(object sender, System.EventArgs e)
		{
			//用110端口新建POP3服务器连接
			TcpClient Server = new TcpClient(this.txtPopServer.Text,110);
			Status.Items.Clear();
			try
			{
				//初始化
				NetStrm = Server.GetStream();
				RdStrm = new StreamReader(Server.GetStream());
				Status.Items.Add(RdStrm.ReadLine());
				//登录服务器过程
				Data = "USER:"+this.txtUsername.Text+"rn";
				szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
				NetStrm.Write(szData,0,szData.Length);
				Status.Items.Add(RdStrm.ReadLine());
				Data ="PASS:"+this.txtPassword.Text+"rn";
				szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
				NetStrm.Write(szData,0,szData.Length);
				Status.Items.Add(RdStrm.ReadLine());
			}
			catch(InvalidOperationException err)
			{
				Status.Items.Add("Error:"+err.ToString());
			}
		}
		private void btnDisConnect_Click(object sender, System.EventArgs e)
		{
			//发送QUIT命令
			Data = "QUIT"+"rn";
			szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
			NetStrm.Write(szData,0,szData.Length);
			Status.Items.Add(RdStrm.ReadLine());
			//断开连接
			NetStrm.Close();
			RdStrm.Close();
		}
		private void btnRetrieve_Click(object sender, System.EventArgs e)
		{
			string szTemp;
			this.rtbMessage.Clear();
			try
			{
				//根据邮件编号从服务器获取相应邮件
				Data = "RETR:"+this.txtMailNum.Text+"rn";
				szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
				NetStrm.Write(szData,0,szData.Length);
				szTemp = RdStrm.ReadLine();
				if(szTemp[0] != '-')
				{
					while(szTemp.IndexOf("<End>") <= 0)
					{
						this.rtbMessage.Text += szTemp;
						szTemp = RdStrm.ReadLine();
					}
				}
				if(this.checkBox1.Checked == false)
				{
					Data = "DELE:"+this.txtMailNum.Text+"rn";
					szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
					NetStrm.Write(szData,0,szData.Length);
					this.Status.Items.Add(RdStrm.ReadLine());
				}
				else
				{
					Status.Items.Add(szTemp);
				}
			}
			catch(InvalidOperationException err)
			{
				Status.Items.Add("Error:"+err.ToString());
			}
		}
	}
}

						