接收邮件的POP3类代码,CSharp代码库,德仔网

代码语言
代码分类
【CSharp】接收邮件的POP3类
作者:vipwan / 发布于2012/11/22/ 644
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.Text;
using System.IO;
using Microsoft.VisualBasic;

namespace 邮件接收器
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        //设置私有变量
        string _server;
        string _username;
        string _userpassword;
        //
        TcpClient _tcp;
        Stream _pop3stream;
        StreamReader _instream;
        StreamWriter _outstream;
        string _strdatain;
        string [] _strNumMains = new string [2];
        //获取服务器.
        public string servername
        {
            get { return _server; }
            set { _server = value; }
        }
        //获取用户名.
        public string username
        {
            get { return _username; }
            set { _username = value; }
        }
        //获取用户密码.
        public string userpassword
        {
            get { return _userpassword; }
            set { _userpassword = value; }
        }
        //链接服务器.
        private void ConnectToServer()
        {
            this._tcp = new TcpClient();
            try
            {
                this._tcp.Connect(_server, 110);
              //  messagebox.show("连接服务器成功");
              //初始化网络流,数据就是通过这个对象读出来的
                _pop3stream = this._tcp.GetStream();
                _instream = new StreamReader(_pop3stream);
                _outstream = new StreamWriter(_pop3stream);
            }
            catch (Exception ex)
            {
                //MessageBox.Show(ex.Message + "/n" + ex.HelpLink);
                //Application.Exit();
            }
        }
        //验证用户的密码.
        private void LogonServer()
        {
            _strdatain = _instream.ReadLine();
            _outstream.WriteLine("USER " + this.username);//输入用户名.
            _outstream.Flush();

            _strdatain = _instream.ReadLine();
            if (_strdatain.Substring(0, 3) == "-ER")
            {
                MessageBox.Show("没有这个用户名.");
                return;
            }
            _outstream.WriteLine("PASS " + this.userpassword);//输入用户的密码.
            _outstream.Flush();
            try
            {
                _strdatain = _instream.ReadLine();
            }
            catch (IOException ioex)
            {
                MessageBox.Show(ioex.Message + "/n" + ioex.HelpLink);
                return;
            }

            if (_strdatain.Substring(0, 4) == "-ERR")
            {
                MessageBox.Show("无法登录,可能使用户名密码错误!!!");
                return;
            }
            //MessageBox.Show("恭喜你,登录成功了...");
        }
        //获取电子邮件.
        private void GetEmailList()
        {
            string from = null;
            string subject = null;
            this._outstream.WriteLine("stat");
            this._outstream.Flush();

           _strdatain = this._instream.ReadLine();
            // MessageBox.Show(result);
           string[] nummessage = _strdatain.Split(' ');
           int totalnum = Convert.ToInt32(nummessage[1]);
           if (totalnum > 0)
               this.listBox1.Items.Add("你有" + totalnum.ToString() + "邮件");
           else
           {
               MessageBox.Show("邮箱里没有邮件......");
           }
            for (int i = 1; i <= totalnum; i++)
            {
                this._outstream.WriteLine("top " + i.ToString() + " 0");
                this._outstream.Flush();
                _strdatain = this._instream.ReadLine();

                while (true)
                {
                    _strdatain = this._instream.ReadLine();
                    if (_strdatain == ".")
                        break;
                    if (_strdatain.Length > 4)
                    {
                        if (_strdatain.Substring(0, 5) == "From:")
                            from = _strdatain;
                        if (_strdatain.Substring(0, 8) == "Subject:")
                            subject = _strdatain;
                    }
                }
                this.listBox1.Items.Add(i.ToString() + " " + from + " " + subject);
            }
        }
        //开始接收邮件的的进程...
        private void _startMail()
        {
            try
            {
                this.listBox1.Items.Add("开始链接到邮件服务器......");
                ConnectToServer();//
                this.listBox1.Items.Add("开始使用用户信息登录服务器......");
                LogonServer();//
                this.listBox1.Items.Add("成功登录.开始接收新邮件......");
                GetEmailList();//
                this.listBox1.Items.Add("邮件接收已经结束......");
            }
            catch (Exception exp)
            { MessageBox.Show(exp.HelpLink + "/n" + exp.Message + "程序将退出..."); Application.Exit(); }
                //不管是否有错误断开服务器链接,和网络流...
            finally
            {
                _outstream.WriteLine("QUIT");
                _outstream.Flush();
                _instream.Close();
                _outstream.Close();
                _pop3stream.Close();
            }
        }
        //登录后加载进程...
        private void Form2_Load(object sender, EventArgs e)
        {
            System.Threading.Thread myThread = new System.Threading.Thread(_startMail);
            myThread.Start();
        }
        //
        private void 登录到网站ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            System.Diagnostics.Process.Start("iexplore.exe", _server);

        }
        //
        private void Form2_FormClosed(object sender, FormClosedEventArgs e)
        {
            Application.Exit();
        }
    }
}
试试其它关键字
　接收邮件　
同语言下
可能有用的
vipwan贡献的其它代码(1)
.接收邮件的POP3类