C#-MailSender邮件发送组件源代码(支持ESMTP, 附件)

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  smtp|源代码

//============================================================
// File: MailSender.cs
// 邮件发送组件
// 支持ESMTP, 多附件
//============================================================

namespace JcPersonal.Utility
{
using System;;
using System.Collections;;
using System.Net.Sockets;;
using System.IO;;
using System.Text;;

/// 〈summary〉
/// Mail 发送器
/// 〈/summary〉
public class MailSender
{

  /// 〈summary〉

  /// SMTP服务器域名

  /// 〈/summary〉

  public string Server {

   get { return server;; }

   set { if (value != server) server = value;; }

  } private string server = "";;

  /// 〈summary〉

  /// SMTP服务器端口 [默认为25]

  /// 〈/summary〉

  public int Port {

   get { return port;; }

   set { if (value != port) port = value;; }

  } private int port = 25;;

  /// 〈summary〉

  /// 用户名 [如果需要身份验证的话]

  /// 〈/summary〉

  public string UserName {

   get { return userName;; }

   set { if (value != userName) userName = value;; }

  } private string userName = "";;

  /// 〈summary〉

  /// 密码 [如果需要身份验证的话]

  /// 〈/summary〉

  public string Password {

   get { return password;; }

   set { if (value != password) password = value;; }

  } private string password = "";;

  /// 〈summary〉

  /// 发件人地址

  /// 〈/summary〉

  public string From {

   get { return from;; }

   set { if (value != from) from = value;;}

  } private string from = "";;

  /// 〈summary〉

  /// 收件人地址

  /// 〈/summary〉

  public string To {

   get { return to;; }

   set { if (value != to) to = value;;}

  } private string to = "";;

  /// 〈summary〉

  /// 发件人姓名

  /// 〈/summary〉

  public string FromName {

   get { return fromName;; }

   set { if (value != fromName) fromName = value;; }

  } private string fromName = "";;

  /// 〈summary〉

  /// 收件人姓名

  /// 〈/summary〉

  public string ToName {

   get { return toName;; }

   set { if (value != toName) toName = value;; }

  } private string toName = "";;

  /// 〈summary〉

  /// 邮件的主题

  /// 〈/summary〉

  public string Subject {

   get { return subject;; }

   set { if (value != subject) subject = value;; }

  } private string subject = "";;

  /// 〈summary〉

  /// 邮件正文

  /// 〈/summary〉

  public string Body {

   get { return body;; }

   set { if (value != body) body = value;; }

  } private string body = "";;

  /// 〈summary〉

  /// 超文本格式的邮件正文

  /// 〈/summary〉

  public string HtmlBody {

   get { return htmlBody;; }

   set { if (value != htmlBody) htmlBody = value;; }

  } private string htmlBody = "";;

  /// 〈summary〉

  /// 是否是html格式的邮件

  /// 〈/summary〉

  public bool IsHtml {

   get { return isHtml;; }

   set { if (value != isHtml) isHtml = value;; }

  } private bool isHtml = false;;

  /// 〈summary〉

  /// 语言编码 [默认为GB2312]

  /// 〈/summary〉

  public string LanguageEncoding {

   get { return languageEncoding;; }

   set { if (value != languageEncoding) languageEncoding = value;; }

  } private string languageEncoding = "GB2312";;

  /// 〈summary〉

  /// 邮件编码 [默认为8bit]

  /// 〈/summary〉

  public string MailEncoding {

   get { return encoding;; }

   set { if (value != encoding) encoding = value;; }

  } private string encoding = "8bit";;

  /// 〈summary〉

  /// 邮件优先级 [默认为3]

  /// 〈/summary〉

  public int Priority {

   get { return priority;; }

   set { if (value != priority) priority = value;; }

  } private int priority = 3;;

  /// 〈summary〉

  /// 附件 [AttachmentInfo]

  /// 〈/summary〉

  public IList Attachments {

   get { return attachments;; }
// set { if (value != attachments) attachments = value;; }

  } private ArrayList attachments = new ArrayList ();;

  /// 〈summary〉

  /// 发送邮件

  /// 〈/summary〉

  public void SendMail ()

  {

   // 创建TcpClient对象, 并建立连接

   TcpClient tcp = null;;

   try

   {

   tcp = new TcpClient (server, port);;

   }

   catch (Exception)

   {

   throw new Exception ("无法连接服务器");;

   }

   ReadString (tcp.GetStream());;//获取连接信息

   // 开始进行服务器认证

   // 如果状态码是250则表示操作成功

   if (!Command (tcp.GetStream(), "EHLO Localhost", "250"))

   throw new Exception ("登陆阶段失败");;

   if (userName != "")

   {

   // 需要身份验证

   if (!Command (tcp.GetStream(), "AUTH LOGIN", "334"))

   throw new Exception ("身份验证阶段失败");;

   string nameB64 = ToBase64 (userName);; // 此处将username转换为Base64码

   if (!Command (tcp.GetStream(), nameB64, "334"))

   throw new Exception ("身份验证阶段失败");;

   string passB64 = ToBase64 (password);; // 此处将password转换为Base64码

   if (!Command (tcp.GetStream(), passB64, "235"))

   throw new Exception ("身份验证阶段失败");;

   }

   // 准备发送

   WriteString (tcp.GetStream(), "mail From: " + from);;

   WriteString (tcp.GetStream(), "rcpt to: " + to);;

   WriteString (tcp.GetStream(), "data");;

   // 发送邮件头

   WriteString (tcp.GetStream(), "Date: " + DateTime.Now);; // 时间

   WriteString (tcp.GetStream(), "From: " + fromName + "〈" + from + "〉");; // 发件人

   WriteString (tcp.GetStream(), "Subject: " + subject);; // 主题

   WriteString (tcp.GetStream(), "To:" + toName + "〈" + to + "〉");; // 收件人

   //邮件格式

   WriteString (tcp.GetStream(), "Content-Type: multipart/mixed;; boundary=\"unique-boundary-1\"");;

   WriteString (tcp.GetStream(), "Reply-To:" + from);; // 回复地址

   WriteString (tcp.GetStream(), "X-Priority:" + priority);; // 优先级

   WriteString (tcp.GetStream(), "MIME-Version:1.0");; // MIME版本

   // 数据ID,随意
// WriteString (tcp.GetStream(), "Message-Id: " + DateTime.Now.ToFileTime() + "security.com");;

   WriteString (tcp.GetStream(), "Content-Transfer-Encoding:" + encoding);; // 内容编码

   WriteString (tcp.GetStream(), "X-Mailer:JcPersonal.Utility.MailSender");; // 邮件发送者

   WriteString (tcp.GetStream(), "");;

   WriteString (tcp.GetStream(), ToBase64 ("This is a multi-part message in MIME format."));;

   WriteString (tcp.GetStream(), "");;

   // 从此处开始进行分隔输入

   WriteString (tcp.GetStream(), "--unique-boundary-1");;

   // 在此处定义第二个分隔符

   WriteString (tcp.GetStream(), "Content-Type: multipart/alternative;;Boundary=\"unique-boundary-2\"");;

   WriteString (tcp.GetStream(), "");;

   if(!isHtml)

   {

   // 文本信息

   WriteString (tcp.GetStream(), "--unique-boundary-2");;

   WriteString (tcp.GetStream(), "Content-Type: text/plain;;charset=" + languageEncoding);;

   WriteString (tcp.GetStream(), "Content-Transfer-Encoding:" + encoding);;

   WriteString (tcp.GetStream(), "");;

   WriteString (tcp.GetStream(), body);;

   WriteString (tcp.GetStream(), "");;//一个部分写完之后就写如空信息,分段

   WriteString (tcp.GetStream(), "--unique-boundary-2--");;//分隔符的结束符号,尾巴后面多了--

   WriteString (tcp.GetStream(), "");;

   }

   else

   {

   //html信息

   WriteString (tcp.GetStream(), "--unique-boundary-2");;

   WriteString (tcp.GetStream(), "Content-Type: text/html;;charset=" + languageEncoding);;

   WriteString (tcp.GetStream(), "Content-Transfer-Encoding:" + encoding);;

   WriteString (tcp.GetStream(), "");;

   WriteString (tcp.GetStream(), htmlBody);;

   WriteString (tcp.GetStream(), "");;

   WriteString (tcp.GetStream(), "--unique-boundary-2--");;//分隔符的结束符号,尾巴后面多了--

   WriteString (tcp.GetStream(), "");;

   }

   // 发送附件

   // 对文件列表做循环

   for (int i = 0;; i 〈 attachments.Count;; i++)

   {

   WriteString (tcp.GetStream(), "--unique-boundary-1");; // 邮件内容分隔符

   WriteString (tcp.GetStream(), "Content-Type: application/octet-stream;;name=\"" + ((AttachmentInfo)attachments[i]).FileName + "\"");; // 文件格式

   WriteString (tcp.GetStream(), "Content-Transfer-Encoding: base64");; // 内容的编码

   WriteString (tcp.GetStream(), "Content-Disposition:attachment;;filename=\"" + ((AttachmentInfo)attachments[i]).FileName + "\"");; // 文件名

   WriteString (tcp.GetStream(), "");;

   WriteString (tcp.GetStream(), ((AttachmentInfo)attachments[i]).Bytes);; // 写入文件的内容

   WriteString (tcp.GetStream(), "");;

   }

   Command (tcp.GetStream(), ".", "250");; // 最后写完了,输入"."

   // 关闭连接

   tcp.Close ();;

  }

  /// 〈summary〉

  /// 向流中写入字符

  /// 〈/summary〉

  /// 〈param name="netStream"〉来自TcpClient的流〈/param〉

  /// 〈param name="str"〉写入的字符〈/param〉

  protected void WriteString (NetworkStream netStream, string str)

  {

   str = str + "\r\n";; // 加入换行符

   // 将命令行转化为byte[]

   byte[] bWrite = Encoding.GetEncoding(languageEncoding).GetBytes(str.ToCharArray());;

   // 由于每次写入的数据大小是有限制的,那么我们将每次写入的数据长度定在75个字节,一旦命令长度超过了75,就分步写入。

   int start=0;;

   int length=bWrite.Length;;

   int page=0;;

   int size=75;;

   int count=size;;

   try

   {

   if (length〉75)

   {

   // 数据分页

   if ((length/size)*size〈length)

   page=length/size+1;;

   else

   page=length/size;;

   for (int i=0;;i〈page;;i++)

   {

   start=i*size;;

   if (i==page-1)

   count=length-(i*size);;

   netStream.Write(bWrite,start,count);;// 将数据写入到服务器上

   }

   }

   else

   netStream.Write(bWrite,0,bWrite.Length);;

   }

   catch(Exception)

   {

   // 忽略错误

   }

  }

  /// 〈summary〉

  /// 从流中读取字符

  /// 〈/summary〉

  /// 〈param name="netStream"〉来自TcpClient的流〈/param〉

  /// 〈returns〉读取的字符〈/returns〉

  protected string ReadString (NetworkStream netStream)

  {

   string sp = null;;

   byte[] by = new byte[1024];;

   int size = netStream.Read(by,0,by.Length);;// 读取数据流

   if (size 〉 0)

   {

   sp = Encoding.Default.GetString(by);;// 转化为String

   }

   return sp;;

  }

  /// 〈summary〉

  /// 发出命令并判断返回信息是否正确

  /// 〈/summary〉

  /// 〈param name="netStream"〉来自TcpClient的流〈/param〉

  /// 〈param name="command"〉命令〈/param〉

  /// 〈param name="state"〉正确的状态码〈/param〉

  /// 〈returns〉是否正确〈/returns〉

  protected bool Command (NetworkStream netStream, string command, string state)

  {

   string sp=null;;

   bool success=false;;

   try

   {

   WriteString (netStream, command);;// 写入命令

   sp = ReadString (netStream);;// 接受返回信息

   if (sp.IndexOf(state) != -1)// 判断状态码是否正确

   success=true;;

   }

   catch(Exception)

   {

   // 忽略错误

   }

   return success;;

  }

  /// 〈summary〉

  /// 字符串编码为Base64

  /// 〈/summary〉

  /// 〈param name="str"〉字符串〈/param〉

  /// 〈returns〉Base64编码的字符串〈/returns〉

  protected string ToBase64 (string str)

  {

   try

   {

   byte[] by = Encoding.Default.GetBytes (str.ToCharArray());;

   str = Convert.ToBase64String (by);;

   }

   catch(Exception)

   {

   // 忽略错误

   }

   return str;;

  }

  /// 〈summary〉

  /// 附件信息

  /// 〈/summary〉

  public struct AttachmentInfo

  {

   /// 〈summary〉

   /// 附件的文件名 [如果输入路径,则自动转换为文件名]

   /// 〈/summary〉

   public string FileName {

   get { return fileName;; }

   set { fileName = Path.GetFileName(value);; }

   } private string fileName;;

   /// 〈summary〉

   /// 附件的内容 [由经Base64编码的字节组成]

   /// 〈/summary〉

   public string Bytes {

   get { return bytes;; }

   set { if (value != bytes) bytes = value;; }

   } private string bytes;;

   /// 〈summary〉

   /// 从流中读取附件内容并构造

   /// 〈/summary〉

   /// 〈param name="ifileName"〉附件的文件名〈/param〉

   /// 〈param name="stream"〉流〈/param〉

   public AttachmentInfo (string ifileName, Stream stream)

   {

   fileName = Path.GetFileName (ifileName);;

   byte[] by = new byte [stream.Length];;

   stream.Read (by,0,(int)stream.Length);; // 读取文件内容

   //格式转换

   bytes = Convert.ToBase64String (by);; // 转化为base64编码

   }

   /// 〈summary〉

   /// 按照给定的字节构造附件

   /// 〈/summary〉

   /// 〈param name="ifileName"〉附件的文件名〈/param〉

   /// 〈param name="ibytes"〉附件的内容 [字节]〈/param〉

   public AttachmentInfo (string ifileName, byte[] ibytes)

   {

   fileName = Path.GetFileName (ifileName);;

   bytes = Convert.ToBase64String (ibytes);; // 转化为base64编码

   }

   /// 〈summary〉

   /// 从文件载入并构造

   /// 〈/summary〉

   /// 〈param name="path"〉〈/param〉

   public AttachmentInfo (string path)

   {

   fileName = Path.GetFileName (path);;

   FileStream file = new FileStream (path, FileMode.Open);;

   byte[] by = new byte [file.Length];;

   file.Read (by,0,(int)file.Length);; // 读取文件内容

   //格式转换

   bytes = Convert.ToBase64String (by);; // 转化为base64编码

   file.Close ();;

   }

  }
}
}

--------------------------------------------------------------------------------

// 使用:

  MailSender ms = new MailSender ();;

  ms.From = "jovenctom.com";;

  ms.To = "jovenccitiz.net";;

  ms.Subject = "Subject";;

  ms.Body = "body text";;

  ms.UserName = "########";; // 怎么能告诉你呢

  ms.Password = "********";; // 怎么能告诉你呢

  ms.Server = "smtp.tom.com";;

  ms.Attachments.Add (new MailSender.AttachmentInfo ("D:\test.txt"));;

  Console.WriteLine ("mail sending...");;

  try

  {

   ms.SendMail ();;

   Console.WriteLine ("mail sended.");;

  }

  catch (Exception e)

  {

   Console.WriteLine (e);;

  }

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