实例介绍
【实例简介】
【实例截图】
【实例截图】
【核心代码】
using System;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Collections;
using System.Runtime .InteropServices ;
using System.Windows.Forms ;
//正则表达式需要用到的命名空间（本程序中主要用于切割字符串）
using System.Text .RegularExpressions ;
namespace MailSend
{
public class SmtpMail
{
public SmtpMail()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
//用来接收调用程序传来的附件路径
private string []FilePath;
// [DllImport("User32.dll")]
// public static extern int MessageBox(int h, string m, string c, int type);
//
/// <summary>
/// 重载的构造函数，以便把相关的附件信息传入
/// </summary>
/// <param name="array"></param>
public SmtpMail(ArrayList array)
{
//在重载构造函数的同时，将FiilePath初始化
FilePath=new string [array.Count ];
Attachments = new System.Collections.ArrayList();
for(int i=0;i<array.Count ;i )
{
FilePath[i]=array[i].ToString ();
}
if(FilePath!=null)
{
AddAttachment(FilePath);
}
}
private string enter="\r\n";
/// <summary>
/// 设定语言代码，默认设定为GB2312，如不需要可设置为""
/// </summary>
private string _charset="GB2312";
/// <summary>
/// 发件人地址
/// </summary>
private string _from="";
/// <summary>
/// 发件人姓名
/// </summary>
private string _fromName="";
/// <summary>
/// 回复邮件地址
/// </summary>
///public string ReplyTo="";
/// <summary>
/// 收件人列表
/// </summary>
private string Recipient;
/// <summary>
/// 邮件服务器域名
/// </summary>
private string mailserver="";
/// <summary>
/// 邮件服务器端口号
/// </summary>
private int mailserverport=25;
/// <summary>
/// SMTP认证时使用的用户名
/// </summary>
private string username="";
/// <summary>
/// SMTP认证时使用的密码
/// </summary>
private string password="";
/// <summary>
/// 是否需要SMTP验证
/// </summary>
private bool ESmtp=false;
/// <summary>
/// 是否Html邮件
/// </summary>
private bool _html=false;
/// <summary>
/// 邮件附件列表
/// </summary>
private IList Attachments;
/// <summary>
/// 邮件发送优先级，可设置为"High","Normal","Low"或"1","3","5"
/// </summary>
private string priority="Normal";
/// <summary>
/// 邮件主题
/// </summary>
private string _subject;
/// <summary>
/// 邮件正文
/// </summary>
private string _body;
/// <summary>
/// 错误消息反馈
/// </summary>
private string errmsg;
/// <summary>
/// TcpClient对象，用于连接服务器
/// </summary>
private TcpClient tc;
/// <summary>
/// NetworkStream对象
/// </summary>
private NetworkStream ns;
/// <summary>
/// SMTP错误代码哈希表
/// </summary>
private Hashtable ErrCodeHT = new Hashtable();
/// <summary>
/// SMTP正确代码哈希表
/// </summary>
private Hashtable RightCodeHT = new Hashtable();
/// <summary>
/// 邮件主题
/// </summary>
public string Subject
{
get
{
return this._subject;
}
set
{
this._subject = value;
}
}
/// <summary>
/// 邮件正文
/// </summary>
public string Body
{
get
{
return this._body;
}
set
{
this._body = value;
}
}
/// <summary>
/// 发件人地址
/// </summary>
public string From
{
get
{
return _from;
}
set
{
this._from = value;
}
}
/// <summary>
/// 设定语言代码，默认设定为GB2312，如不需要可设置为""
/// </summary>
public string Charset
{
get
{
return this._charset;
}
set
{
this._charset = value;
}
}
/// <summary>
/// 发件人姓名
/// </summary>
public string FromName
{
get
{
return this._fromName;
}
set
{
this._fromName = value;
}
}
/// <summary>
/// 收件人姓名
/// </summary>
public string RecipientName
{
get
{
return this.Recipient;
}
set
{
this.Recipient = value;
}
}
/// <summary>
/// 邮件服务器域名和验证信息
/// 形如："user:pass@www.server.com:25"，也可省略次要信息。如"user:pass@www.server.com"或"www.server.com"
/// </summary>
public string MailDomain
{
set
{
mailserver=value;
}
}
/// <summary>
/// 邮件服务器端口号
/// </summary>
public int MailDomainPort
{
set
{
mailserverport=value;
}
}
/// <summary>
/// SMTP认证时使用的用户名
/// </summary>
public string MailServerUserName
{
set
{
if(value.Trim()!="")
{
username=value.Trim();
ESmtp=true;
}
else
{
username="";
ESmtp=false;
}
}
}
/// <summary>
/// SMTP认证时使用的密码
/// </summary>
public string MailServerPassWord
{
set
{
password=value;
}
}
/// <summary>
/// 邮件发送优先级，可设置为"High","Normal","Low"或"1","3","5"
/// </summary>
public string Priority
{
set
{
switch(value.ToLower())
{
case "high":
priority="High";
break;
case "1":
priority="High";
break;
case "normal":
priority="Normal";
break;
case "3":
priority="Normal";
break;
case "low":
priority="Low";
break;
case "5":
priority="Low";
break;
default:
priority="Normal";
break;
}
}
}
/// <summary>
/// 是否Html邮件
/// </summary>
public bool Html
{
get
{
return this._html;
}
set
{
this._html = value;
}
}
/// <summary>
/// 错误消息反馈
/// </summary>
public string ErrorMessage
{
get
{
return errmsg;
}
}
public bool eSmtp
{
get
{
return this.ESmtp;
}
set
{
this.ESmtp =value;
}
}
/// <summary>
/// 添加邮件附件
/// </summary>
/// <param name="FilePath">附件绝对路径</param>
public void AddAttachment(params string[] FilePath)
{
try
{
if(FilePath==null)
{
throw(new ArgumentNullException("FilePath"));
}
for(int i=0;i<FilePath.Length;i )
{
Attachments.Add(FilePath[i]);
}
}
catch(Exception ex)
{
MessageBox.Show (ex.ToString ());
}
}
/// <summary>
/// 得到上传附件的文件流
/// </summary>
/// <param name="FilePath">附件的绝对路径</param>
private string GetStream(string FilePath)
{
try
{
//建立文件流对象
System.IO.FileStream FileStr=new System.IO.FileStream(FilePath,System.IO.FileMode.Open);
byte[] by=new byte[System.Convert.ToInt32(FileStr.Length)];
FileStr.Read(by,0,by.Length);
FileStr.Close();
return(System.Convert.ToBase64String(by));
}
catch
{
MessageBox.Show ("可能你要打开的文件的属性是只读的！","请检查权限");
return null;
}
}
/// <summary>
/// 发送邮件方法，所有参数均通过属性设置。
/// </summary>
public bool Send()
{
if(mailserver.Trim()=="")
{
MessageBox.Show ("必须指定SMTP服务器");
return false;
}
return SendEmail();
}
/// <summary>
/// 发送邮件方法
/// </summary>
/// <param name="smtpserver">smtp服务器信息，如"username:password@www.smtpserver.com:25"，也可去掉部分次要信
public bool Send(string smtpserver)
{
MailDomain=smtpserver;
return Send();
}
/// <summary>
/// 发送邮件方法
/// </summary>
/// <param name="smtpserver">smtp服务器信息，如"username:password@www.smtpserver.com:25"，也可去掉部分次要信
/// <param name="from">发件人mail地址</param>
/// <param name="fromname">发件人姓名</param>
/// <param name="to">收件人地址</param>
/// <param name="toname">收件人姓名</param>
/// <param name="html">是否HTML邮件</param>
/// <param name="subject">邮件主题</param>
/// <param name="body">邮件正文</param>
public bool Send(string smtpserver,string from,string fromname,string to,bool html,string
subject,string body)
{
MailDomain=smtpserver;
From=from;
FromName=fromname;
Recipient=to;
Html=html;
Subject=subject;
Body=body;
return Send();
}
void Dispose()
{
if(ns!=null)ns.Close();
if(tc!=null)tc.Close();
}
/// <summary>
/// SMTP回应代码哈希表
/// </summary>
private void SMTPCodeAdd()
{
ErrCodeHT.Add("500","邮箱地址错误");
ErrCodeHT.Add("501","参数格式错误");
ErrCodeHT.Add("502","命令不可实现");
ErrCodeHT.Add("503","服务器需要SMTP验证");
ErrCodeHT.Add("504","命令参数不可实现");
ErrCodeHT.Add("421","服务未就绪，关闭传输信道");
ErrCodeHT.Add("450","要求的邮件操作未完成，邮箱不可用（例如，邮箱忙）");
ErrCodeHT.Add("550","要求的邮件操作未完成，邮箱不可用（例如，邮箱未找到，或不可访问）");
ErrCodeHT.Add("451","放弃要求的操作；处理过程中出错");
ErrCodeHT.Add("551","用户非本地，请尝试<forward-path>");
ErrCodeHT.Add("452","系统存储不足，要求的操作未执行");
ErrCodeHT.Add("552","过量的存储分配，要求的操作未执行");
ErrCodeHT.Add("553","邮箱名不可用，要求的操作未执行（例如邮箱格式错误）");
ErrCodeHT.Add("432","需要一个密码转换");
ErrCodeHT.Add("534","认证机制过于简单");
ErrCodeHT.Add("538","当前请求的认证机制需要加密");
ErrCodeHT.Add("454","临时认证失败");
ErrCodeHT.Add("530","需要认证");
RightCodeHT.Add("220","服务就绪");
RightCodeHT.Add("250","要求的邮件操作完成");
RightCodeHT.Add("251","用户非本地，将转发向<forward-path>");
RightCodeHT.Add("354","开始邮件输入，以<enter>.<enter>结束");
RightCodeHT.Add("221","服务关闭传输信道");
RightCodeHT.Add("334","服务器响应验证Base64字符串");
RightCodeHT.Add("235","验证成功");
}
/// <summary>
/// 将字符串编码为Base64字符串
/// </summary>
/// <param name="str">要编码的字符串</param>
private string Base64Encode(string str)
{
byte[] barray;
barray=Encoding.Default.GetBytes(str);
return Convert.ToBase64String(barray);
}
/// <summary>
/// 将Base64字符串解码为普通字符串
/// </summary>
/// <param name="str">要解码的字符串</param>
private string Base64Decode(string str)
{
byte[] barray;
barray=Convert.FromBase64String(str);
return Encoding.Default.GetString(barray);
}
/// <summary>
/// 发送SMTP命令
/// </summary>
private bool SendCommand(string str)
{
byte[] WriteBuffer;
if(str==null||str.Trim()==String.Empty)
{
return true;
}
WriteBuffer = Encoding.Default.GetBytes(str);
try
{
ns.Write(WriteBuffer,0,WriteBuffer.Length);
}
catch
{
errmsg="网络连接错误";
return false;
}
return true;
}
/// <summary>
/// 接收SMTP服务器回应
/// </summary>
private string RecvResponse()
{
int StreamSize;
string ReturnValue = String.Empty;
byte[] ReadBuffer = new byte[1024] ;
try
{
StreamSize=ns.Read(ReadBuffer,0,ReadBuffer.Length);
}
catch(Exception ex)
{
MessageBox.Show (ex.ToString ());
return "false";
}
if (StreamSize==0)
{
return ReturnValue ;
}
else
{
ReturnValue = Encoding.Default.GetString(ReadBuffer).Substring(0,StreamSize);
return ReturnValue;
}
}
/// <summary>
/// 与服务器交互，发送一条命令并接收回应。
/// </summary>
/// <param name="str">一个要发送的命令</param>
/// <param name="errstr">如果错误，要反馈的信息</param>
private bool Dialog(string str,string errstr)
{
if(str==null||str.Trim()=="")
{
return true;
}
if(SendCommand(str))
{
string RR=RecvResponse();
if(RR=="false")
{
return false;
}
try
{
string RRCode=RR.Substring(0,3);
if(RightCodeHT[RRCode]!=null)
{
return true;
}
else
{
if(ErrCodeHT[RRCode]!=null)
{
errmsg =(RRCode ErrCodeHT[RRCode].ToString());
errmsg =enter;
}
else
{
errmsg =RR;
}
errmsg =errstr;
return false;
}
}
catch
{
MessageBox.Show ("发送的附件超过本服务器对个人软件的支持！","请检查附件的大小");
return false;
}
}
else
{
return false;
}
}
/// <summary>
/// 与服务器交互，发送一组命令并接收回应。
/// </summary>
private bool Dialog(string[] str,string errstr)
{
for(int i=0;i<str.Length;i )
{
//如果在身份验证阶段有一个不成功，就返回错误标志位
if(!Dialog(str[i],""))
{
errmsg =enter;
errmsg =errstr;
return false;
}
}
//身份验证全部正确的话，则返回正确标志位
return true;
}
/// <summary>
/// SendEmail
/// </summary>
/// <returns></returns>
private bool SendEmail()
{
try
{
tc=new TcpClient(mailserver,mailserverport);
}
catch
{
MessageBox.Show ("连接失败","请确认");
return false;
}
ns = tc.GetStream();
SMTPCodeAdd();
//验证网络连接是否正确
if(RightCodeHT[RecvResponse().Substring(0,3)]==null)
{
errmsg="网络连接失败";
return false;
}
string[] SendBuffer;
string SendBufferstr;
//进行SMTP验证
if(ESmtp)
{
SendBuffer=new String[4];
SendBuffer[0]="EHLO " mailserver enter;
SendBuffer[1]="AUTH LOGIN" enter;
SendBuffer[2]=Base64Encode(username) enter;
SendBuffer[3]=Base64Encode(password) enter;
if(!Dialog(SendBuffer,"SMTP服务器验证失败，请核对用户名和密码。"))
{
MessageBox.Show ("SMTP服务器验证失败，请核对用户名和密码。");
return false;
}
}
else
{
SendBufferstr="HELO " mailserver enter;
if(!Dialog(SendBufferstr,""))
return false;
}
//
SendBufferstr="MAIL FROM:<" From ">" enter;
if(!Dialog(SendBufferstr,"发件人地址错误，或不能为空"))
{
MessageBox.Show("发件人地址错误，或不能为空");
return false;
}
//把传过来的收件人的地址分割然后提交给服务器
string split=",";
string []address=Regex.Split (RecipientName,split);
SendBuffer=new string [address.Length];
for(int i=0;i<SendBuffer.Length;i )
{
SendBuffer[i]="RCPT TO:<" address[i] ">" enter;
}
if(!Dialog(SendBuffer,"收件人地址有误"))
{
MessageBox.Show("收件人地址有误");
return false;
}
SendBufferstr="DATA" enter;
if(!Dialog(SendBufferstr,""))
return false;
SendBufferstr="From:" FromName "<" From ">" enter;
SendBufferstr = "To:<" RecipientName ">" enter;
SendBufferstr =((Subject==String.Empty || Subject==null)?"Subject:":((Charset=="")?("Subject:"
Subject):("Subject:" "=?" Charset.ToUpper() "?B?" Base64Encode(Subject) "?="))) enter;
SendBufferstr ="X-Priority:" priority enter;
SendBufferstr ="X-Mailer: ArgentSwan Mail Sender" enter;
SendBufferstr ="MIME-Version: 1.0" enter;
//MIME定义了5个新的信头字段，可以与原有信头字段一样，用在RF822邮件的首部中。
//1．MIME版本信头字段 格式：MIME-Version:1.0 <CRLF>
//2．邮件唯一标识信头字段 格式：Content-ID：唯一标识信件的字符串 <CRLF>
//3．邮件内容描述信头字段 格式：Content-Description:描述文本 <CRLF>
//4．MIME邮件的内容类型信头字段 格式：Content-Type:主类别标识符/子类别标识符 [；参数列表] <CRLF>
//5．内容传送编码方式信头字段 格式：Content-Transfer-Encoding:编码方式标识符 <CRLF>
if(Attachments.Count!=0)
{
//mixed 按照特定顺序的几个独立部分
SendBufferstr ="Content-Type: multipart/mixed;" enter;
SendBufferstr = " boundary=\"***"
(Html?"001_yinhu19821115":"001_yinhu19831115") "***\"" enter enter;
}
if(Html)
{
if(Attachments.Count==0)
{
//multipart多部分 alternative 不同格式的同一邮件
SendBufferstr = "Content-Type: multipart/alternative;" enter;//内容格式和分隔符
SendBufferstr = " boundary=\"***003_yinhu19821115***\"" enter enter;
SendBufferstr = "This is a multi-part message in MIME format." enter enter;
}
else
{
SendBufferstr ="This is a multi-part message in MIME format." enter enter;
SendBufferstr = "--***001_yinhu19821115***" enter;
SendBufferstr = "Content-Type: multipart/alternative;" enter;//内容格式和分隔符
SendBufferstr = " boundary=\"***003_yinhu19821115***\"" enter enter;
}
SendBufferstr = "--***003_yinhu19821115***" enter;
SendBufferstr = "Content-Type: text/plain;" enter;
SendBufferstr = ((Charset=="")?(" charset=\"iso-8859-1\""):(" charset=\""
Charset.ToLower() "\"")) enter;
SendBufferstr ="Content-Transfer-Encoding: base64" enter enter;
SendBufferstr = Base64Encode("邮件内容为HTML格式，请选择HTML方式查看") enter enter;
SendBufferstr = "--***003_yinhu19821115***" enter;
SendBufferstr ="Content-Type: text/html;" enter;
SendBufferstr =((Charset=="")?(" charset=\"iso-8859-1\""):(" charset=\""
Charset.ToLower() "\"")) enter;
SendBufferstr ="Content-Transfer-Encoding: base64" enter enter;
SendBufferstr =Base64Encode(Body) enter enter;
SendBufferstr = "--***003_yinhu19821115***--" enter;
}
else
{
if(Attachments.Count!=0)
{
SendBufferstr = "--***001_yinhu19831115***" enter;
}
SendBufferstr ="Content-Type: text/plain;" enter;
SendBufferstr =((Charset=="")?(" charset=\"iso-8859-1\""):(" charset=\""
Charset.ToLower() "\"")) enter;
SendBufferstr ="Content-Transfer-Encoding: base64" enter enter;
SendBufferstr = Base64Encode(Body) enter;
}
if(Attachments.Count!=0)
{
for(int i=0;i<Attachments.Count;i )
{
string filepath = Attachments[i].ToString();
SendBufferstr = "--***"
(Html?"001_yinhu19821115":"001_yinhu19831115") "***" enter;
//用于在电子邮件中传输一个含有任意数据的实体。内容是一个未解释的字节序列。
//当内容类型未知或者对数据没有具体定义媒体类别时，通常使用它描述
SendBufferstr = "Content-Type: application/octet-stream" enter;
SendBufferstr = " name=\"=?" Charset.ToUpper() "?B?" Base64Encode
(filepath.Substring(filepath.LastIndexOf("\\") 1)) "?=\"" enter;
SendBufferstr = "Content-Transfer-Encoding: base64" enter;
SendBufferstr = "Content-Disposition: attachment;" enter;
SendBufferstr = " filename=\"=?" Charset.ToUpper() "?B?" Base64Encode
(filepath.Substring(filepath.LastIndexOf("\\") 1)) "?=\"" enter enter;
SendBufferstr = GetStream(filepath) enter enter;
}
SendBufferstr = "--***" (Html?"001_yinhu19821115":"001_yinhu19831115")
"***--" enter enter;
}
SendBufferstr = enter "." enter;
if(!Dialog(SendBufferstr,"错误信件信息"))
return false;
SendBufferstr="QUIT" enter;
if(!Dialog(SendBufferstr,"断开连接时错误"))
return false;
ns.Close();
tc.Close();
return true;
}
}
}
标签： 邮件
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