发邮件类

技术2022-05-11 62

using System;using System.Text;using System.IO;using System.Net;using System.Net.Sockets;using System.Collections;

namespace MFC266{ /// <summary> /// 邮件可以通过 Microsoft Windows 2000 中内置的 SMTP 邮件服务或任意 SMTP 服务器来传送 /// </summary> public class SmtpMail { #region 成员

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> /// 收件人姓名 /// </summary> private string _recipientName="";

/// <summary> /// 收件人列表 /// </summary> private Hashtable Recipient=new Hashtable();

/// <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> /// 密送收件人列表 /// </summary> ///private Hashtable RecipientBCC=new Hashtable();

/// <summary> /// 收件人数量 /// </summary> private int RecipientNum=0;

/// <summary> /// 最多收件人数量 /// </summary> private int recipientmaxnum=5;

/// <summary> /// 密件收件人数量 /// </summary> ///private int RecipientBCCNum=0;

/// <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> /// 服务器交互记录 /// </summary> private string logs="";

/// <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> /// 初始化 <see cref="Lion.Web.Mail.SmtpMail"/> 类的新实例 /// </summary> #endregion #region 属性

/// <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._recipientName; } set { this._recipientName = 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 { string maidomain=value.Trim(); int tempint;

if(maidomain!="") { tempint=maidomain.IndexOf("@"); if(tempint!=-1) { string str=maidomain.Substring(0,tempint); MailServerUserName=str.Substring(0,str.IndexOf(":")); MailServerPassWord=str.Substring(str.IndexOf(":")+1,str.Length-str.IndexOf(":")-1); maidomain=maidomain.Substring(tempint+1,maidomain.Length-tempint-1); }

tempint=maidomain.IndexOf(":"); if(tempint!=-1) { mailserver=maidomain.Substring(0,tempint); mailserverport=System.Convert.ToInt32(maidomain.Substring(tempint+1,maidomain.Length-tempint-1)); } else { mailserver=maidomain;

}

} }

/// <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; } }

/// <summary> /// 服务器交互记录，如发现本组件不能使用的SMTP服务器，请将出错时的Logs发给我（lion-a@sohu.com），我将尽快查明原因。 /// </summary> public string Logs { get { return logs; } }

/// <summary> /// 最多收件人数量 /// </summary> public int RecipientMaxNum { set { recipientmaxnum = value; } }

#endregion #region 方法

/// <summary> /// 添加邮件附件 /// </summary> /// <param name="FilePath">附件绝对路径</param> public void AddAttachment(params string[] FilePath) { if(FilePath==null) { throw(new ArgumentNullException("FilePath")); } for(int i=0;i<FilePath.Length;i++) { Attachments.Add(FilePath[i]); } } /// <summary> /// 添加一组收件人（不超过recipientmaxnum个），参数为字符串数组 /// </summary> /// <param name="Recipients">保存有收件人地址的字符串数组（不超过recipientmaxnum个）</param> public bool AddRecipient(params string[] Recipients) { if(Recipient==null) { Dispose(); throw(new ArgumentNullException("Recipients")); } for(int i=0;i<Recipients.Length;i++) { string recipient = Recipients[i].Trim(); if(recipient==String.Empty) { Dispose(); throw(new ArgumentNullException("Recipients["+ i +"]")); } if(recipient.IndexOf("@")==-1) { Dispose(); throw(new ArgumentException("Recipients.IndexOf(/"@/")==-1","Recipients")); } if(!AddRecipient(recipient)) { return false; } } return true; }

/// <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()=="") { throw(new ArgumentNullException("Recipient","必须指定SMTP服务器")); }

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息，如"www.smtpserver.com"</param> /// <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,string toname,bool html,string subject,string body) { MailDomain=smtpserver; From=from; FromName=fromname; AddRecipient(to); RecipientName=toname; Html=html; Subject=subject; Body=body; return Send(); }

#endregion #region 构造函数 public SmtpMail() { Attachments = new System.Collections.ArrayList(); } #endregion #region Private Helper Functions

/// <summary> /// 添加一个收件人 /// </summary> /// <param name="Recipients">收件人地址</param> private bool AddRecipient(string Recipients) { if(RecipientNum<recipientmaxnum) { Recipient.Add(RecipientNum,Recipients); RecipientNum++; return true; } else { Dispose(); throw(new ArgumentOutOfRangeException("Recipients","收件人过多不可多于 "+ recipientmaxnum +" 个")); } }

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> /// 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) { //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)); }

/// <summary> /// 发送SMTP命令 /// </summary> private bool SendCommand(string str) { byte[] WriteBuffer; if(str==null||str.Trim()==String.Empty) { return true; } logs+=str; 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 { errmsg="网络连接错误"; return "false"; }

if (StreamSize==0) { return ReturnValue ; } else { ReturnValue = Encoding.Default.GetString(ReadBuffer).Substring(0,StreamSize); logs+=ReturnValue+this.enter; 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; } 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; } } 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++) { if(!Dialog(str[i],"")) { errmsg+=enter; errmsg+=errstr; return false; } }

return true; }

/// <summary> /// SendEmail /// </summary> /// <returns></returns> private bool SendEmail() { //连接网络 try { tc=new TcpClient(mailserver,mailserverport); } catch(Exception e) { errmsg=e.ToString(); 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。")) 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")) return false;

// SendBuffer=new string[recipientmaxnum]; for(int i=0;i<Recipient.Count;i++) { SendBuffer[i]="RCPT TO:<" + Recipient[i].ToString() +">" + enter;

} if(!Dialog(SendBuffer,"收件人地址有误")) return false;

/* SendBuffer=new string[10]; for(int i=0;i<RecipientBCC.Count;i++) {

SendBuffer[i]="RCPT TO:<" + RecipientBCC[i].ToString() +">" + enter;

}

if(!Dialog(SendBuffer,"密件收件人地址有误")) return false; */ SendBufferstr="DATA" + enter; if(!Dialog(SendBufferstr,"")) return false;

SendBufferstr="From:" + FromName + "<" + From +">" +enter;

//if(ReplyTo.Trim()!="") //{ // SendBufferstr+="Reply-To: " + ReplyTo + enter; //}

//SendBufferstr+="To:" + RecipientName + "<" + Recipient[0] +">" +enter; SendBufferstr += "To:=?"+Charset.ToUpper()+"?B?"+Base64Encode(RecipientName)+"?="+"<"+Recipient[0]+">"+enter; SendBufferstr+="CC:"; for(int i=0;i<Recipient.Count;i++) { SendBufferstr+=Recipient[i].ToString() + "<" + Recipient[i].ToString() +">,"; } SendBufferstr+=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-MSMail-Priority:" + priority + enter; SendBufferstr+="Importance:" + priority + enter; SendBufferstr+="X-Mailer: Lion.Web.Mail.SmtpMail Pubclass [cn]" + enter; SendBufferstr+="MIME-Version: 1.0" + enter; if(Attachments.Count!=0) { SendBufferstr+="Content-Type: multipart/mixed;" + enter; SendBufferstr += " boundary=/"====="+(Html?"001_Dragon520636771063_":"001_Dragon303406132050_")+"=====/""+enter+enter; }

if(Html) { if(Attachments.Count==0) { SendBufferstr += "Content-Type: multipart/alternative;"+enter;//内容格式和分隔符 SendBufferstr += " boundary=/"=====003_Dragon520636771063_=====/""+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_Dragon520636771063_====="+enter; SendBufferstr += "Content-Type: multipart/alternative;"+enter;//内容格式和分隔符 SendBufferstr += " boundary=/"=====003_Dragon520636771063_=====/""+enter+enter; } SendBufferstr += "--=====003_Dragon520636771063_====="+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_Dragon520636771063_====="+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_Dragon520636771063_=====--"+enter; } else { if(Attachments.Count!=0) { SendBufferstr += "--=====001_Dragon303406132050_====="+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; } //SendBufferstr += "Content-Transfer-Encoding: base64"+enter;

if(Attachments.Count!=0) { for(int i=0;i<Attachments.Count;i++) { string filepath = (string)Attachments[i]; SendBufferstr += "--====="+ (Html?"001_Dragon520636771063_":"001_Dragon303406132050_") +"====="+enter; //SendBufferstr += "Content-Type: application/octet-stream"+enter; SendBufferstr += "Content-Type: text/plain;"+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_Dragon520636771063_":"001_Dragon303406132050_") +"=====--"+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; }

#endregion

#region /* /// <summary> /// 添加一个密件收件人 /// </summary> /// <param name="str">收件人地址</param> public bool AddRecipientBCC(string str) { if(str==null||str.Trim()=="") return true; if(RecipientBCCNum<10) { RecipientBCC.Add(RecipientBCCNum,str); RecipientBCCNum++; return true; } else { errmsg+="收件人过多"; return false; } }

/// <summary> /// 添加一组密件收件人（不超过10个），参数为字符串数组 /// </summary> /// <param name="str">保存有收件人地址的字符串数组（不超过10个）</param> public bool AddRecipientBCC(string[] str) { for(int i=0;i<str.Length;i++) { if(!AddRecipientBCC(str[i])) { return false; } } return true; }

*/ #endregion }

}

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