自己毕业论文中设计的邮件发送和接收程序（2）

代码太多，IE有点受不了，重新在发一个，上面的是收邮件类。下面的这个是发邮件的：

 

  1using System;
  2using System.Collections;
  3using System.Collections.Generic;
  4using System.Data;
  5using System.Net;
  6using System.Net.Sockets;
  7using System.IO;
  8using System.Text;
  9using System.Windows.Forms;
 10namespace ConsoleApplication1
 11{
 12    public class SendMail
 13    {
 14        // mei jia ru zhuang tai ce shi
 15        public void Send_Mail(string serverText,string sendermail,string senderpass,string mailsen,string mailrec,string subject,string body)
 16        {
 17            Cursor cr = Cursor.Current;
 18            Cursor.Current = Cursors.WaitCursor;
 19            TcpClient SmtpServ = new TcpClient(serverText, 25);
 20            string Data;
 21            byte[] szData;
 22            string CRLF = "\r\n";
 23            try
 24            {
 25                // initialization
 26                NetworkStream NetStrm = SmtpServ.GetStream();
 27                StreamReader RdStrm = new StreamReader(SmtpServ.GetStream());
 28                // LogList.Items.Add(RdStrm.ReadLine());
 29                Console.WriteLine(RdStrm.ReadLine());
 30                // say hello to server and send response into log report
 31                Data = "HELO server " + CRLF;
 32                szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
 33                NetStrm.Write(szData, 0, szData.Length);
 34                // LogList.Items.Add(RdStrm.ReadLine());
 35                Console.WriteLine(RdStrm.ReadLine());
 36                Data = "AUTH LOGIN" + CRLF;
 37                szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
 38                NetStrm.Write(szData, 0, szData.Length);
 39                // LogList.Items.Add(RdStrm.ReadLine());
 40                Console.WriteLine(RdStrm.ReadLine());
 41                byte[] temp = System.Text.Encoding.ASCII.GetBytes(sendermail);
 42                Data = Convert.ToBase64String(temp) + CRLF;
 43                szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
 44                NetStrm.Write(szData, 0, szData.Length);
 45                // LogList.Items.Add(RdStrm.ReadLine());
 46                Console.WriteLine(RdStrm.ReadLine());
 47                temp = System.Text.Encoding.ASCII.GetBytes(senderpass);
 48                Data = Convert.ToBase64String(temp) + CRLF;
 49                szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
 50                NetStrm.Write(szData, 0, szData.Length);
 51                // LogList.Items.Add(RdStrm.ReadLine());
 52                Console.WriteLine(RdStrm.ReadLine());
 53
 54                // send sender data
 55                Data = "MAIL FROM: " + "<" + mailsen + ">" + CRLF;
 56                szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
 57                NetStrm.Write(szData, 0, szData.Length);
 58                // LogList.Items.Add(RdStrm.ReadLine());
 59                Console.WriteLine(RdStrm.ReadLine());
 60                // send receiver data
 61                Data = "RCPT TO: " + "<" + mailrec + ">" + CRLF;
 62                szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
 63                NetStrm.Write(szData, 0, szData.Length);
 64                // LogList.Items.Add(RdStrm.ReadLine());
 65                Console.WriteLine(RdStrm.ReadLine());
 66                // send DATA
 67                Data = "DATA" + CRLF;
 68                szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
 69                NetStrm.Write(szData, 0, szData.Length);
 70                // LogList.Items.Add(RdStrm.ReadLine());
 71                Console.WriteLine(RdStrm.ReadLine());
 72                // send content data
 73                Data = "SUBJECT:" + subject + CRLF + CRLF + "BODY:" + body + CRLF + "." + CRLF;
 74                // Data = sSubject.Text + CRLF + sMessage.Text + CRLF + "." + CRLF;
 75                szData = System.Text.Encoding.GetEncoding("GBK").GetBytes(Data.ToCharArray());
 76                NetStrm.Write(szData, 0, szData.Length);
 77                // LogList.Items.Add(RdStrm.ReadLine());
 78                Console.WriteLine(RdStrm.ReadLine());
 79                // quit from server SMTP
 80                Data = "QUIT" + CRLF;
 81                szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
 82                NetStrm.Write(szData, 0, szData.Length);
 83                // LogList.Items.Add(RdStrm.ReadLine());
 84                Console.WriteLine(RdStrm.ReadLine());
 85                // close connection
 86                NetStrm.Close();
 87                RdStrm.Close();
 88                // LogList.Items.Add("Close connection");
 89                Console.WriteLine("Close connection");
 90                // LogList.Items.Add("Send mail successly..");
 91                // back to normal cursor
 92                Cursor.Current = cr;
 93            }
 94            catch (InvalidOperationException err)
 95            {
 96                // LogList.Items.Add("Error: " + err.ToString());
 97                Console.WriteLine("Error: " + err.ToString());
 98            }
 99        }
100    }
101}

程序没有实现对邮件附件的下载和发送，因为我程序不需要这个功能，我只需要提取subject和body就可以。

因为我只需要知道邮件正文的信息，所以这里一个最重要的问题就是新邮件的提取，当然用uidl命令就可以，我需要实现

用文件系统（别的也可以）存储好已经下载的邮件列表，然后登陆邮件服务器，查看是否有不同于我保存的列表的邮件，如果有就是新邮件，当然了这里逻辑上感觉还是简单，但也足够用，大家如果有好思路可以告诉我啊！！！！！！！

程序运行时，需要先运行ReceivMail类中的Create_New方法，创建以保存的邮件列表，然后就可以分别调用SendMail类发邮件，接着就可以调用ReceivMail类提取新邮件了。大家有疑问可以问我，估计很简单，应该没问题。