C#写的支持SMTP验证的发送邮件组件(2)
/// <summary>
/// 接收SMTP服务器回应
/// </summary>
private string RecvResponse()
{
int StreamSize;
string ReturnValue = "";
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;
return ReturnValue;
}
}
/// <summary>
/// 与服务器交互，发送一条命令并接收回应。
/// </summary>
/// <param name="Command">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 Command,string errstr)
{
if(Command==null||Command.Trim()=="")
{
return true;
}
if(SendCommand(Command))
{
string RR=RecvResponse();
if(RR=="false")
{
return false;
}
string RRCode=RR.Substring(0,3);
if(RightCodeHT[RRCode]!=null)
{
return true;
}
else
{
errmsg+=(RRCode+ErrCodeHT[RRCode].ToString());
errmsg+=enter;
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[] Command,string errstr)
{
for(int i=0;i<Command.Length;i++)
{
if(!Dialog(Command[i],""))
{
errmsg+=enter;
errmsg+=errstr;
return false;
}
}
return true;
}
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"))
return false;
//
SendBuffer=new string[10];
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;
SendBufferstr+="To:" + RecipientName + "<" + Recipient[0] +">" +enter;
SendBufferstr+="CC:";
for(int i=1;i<Recipient.Count;i++)
{
SendBufferstr+=Recipient[i].ToString() + "<" + Recipient[i].ToString() +">,";
}
SendBufferstr+=enter;
if(ReplyTo.Trim()!="")
{
SendBufferstr+="Reply-To: " + ReplyTo + enter;
}
if(Charset=="")
{
SendBufferstr+="Subject:" + Subject + enter;
}
else
{
SendBufferstr+="Subject:" + "=?" + Charset.ToUpper() + "?B?" + Base64Encode(Subject) +"?=" +enter;
}
SendBufferstr+="MIME-Version: 1.0" + enter;
if(Html)
{
SendBufferstr+="Content-Type: text/html;" + enter;
}
else
{
SendBufferstr+="Content-Type: text/plain;" + enter;
}
if(Charset=="")
{
SendBufferstr+="charset=\"iso-8859-1\"" + enter;
}
else
{
SendBufferstr+="charset=\"" + Charset.ToLower() + "\"" + enter;
}
SendBufferstr+="Content-Transfer-Encoding: base64" + enter;
SendBufferstr+="X-Priority:" + priority + enter;
SendBufferstr+="X-MSMail-Priority:" + priority + enter;
SendBufferstr+="Importance:" + priority + enter;
SendBufferstr+="X-Mailer: Huolx.Pubclass" + enter;
SendBufferstr+= enter + enter;
SendBufferstr+= Base64Encode(Body) + 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;
}
/// <summary>
/// 发送邮件方法，所有参数均通过属性设置。
/// </summary>
public bool Send()
{
if(Recipient.Count==0)
{
errmsg="收件人列表不能为空";
return false;
}
if(RecipientName=="")
RecipientName=Recipient[0].ToString();
if(mailserver.Trim()=="")
{
errmsg="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@:25"，也可去掉部分次要信息，如""</param>
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@:25"，也可去掉部分次要信息，如""</param>
/// <param name="from">发件人mail地址</param>
/// <param name="fromname">发件人姓名</param>
/// <param name="replyto">回复邮件地址</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 replyto,string to,string toname,bool html,string subject,string body)
{
MailDomain=smtpserver;
From=from;
FromName=fromname;
ReplyTo=replyto;
AddRecipient(to);
RecipientName=toname;
Html=html;
Subject=subject;
Body=body;
return Send();
}
}
}
