server.cs

email 发送 asp.net 2.0开发

				}

				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=networkStream.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.CRLF;
					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()==string.Empty) {
					return true;
				}

				if(SendCommand(str)) {
					string RR=RecvResponse();
					if(RR=="false") {
					return false;
				}
					//检查返回的代码，根据[RFC 821]返回代码为3位数字代码如220
				string RRCode=RR.Substring(0,3);
				if(RightCodeHT[RRCode]!=null) {
					return true;
				}
				else {
					if(ErrCodeHT[RRCode]!=null) {
					errmsg+=(RRCode+ErrCodeHT[RRCode].ToString());
					errmsg+=CRLF;
				
					}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+=CRLF;
						errmsg+=errstr;
						return false;
					}
				}

				return true;
			}


			//连接服务器
			private bool Connect(string smtpServer,int port) {
				//创建Tcp连接
				try {
					tcpClient=new TcpClient(smtpServer,port);
				}
				catch(Exception e) {
					errmsg=e.ToString();
					return false;
				}   
				networkStream=tcpClient.GetStream();

				//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;
				}
				return true;
			}

			private string GetPriorityString(MailPriority mailPriority) {
				string priority="Normal";
				if (mailPriority==MailPriority.Low) {
					priority="Low";
				}
				else if (mailPriority==MailPriority.High) {
					priority="High";
				}
				return priority;
			}

			/// <summary>
			/// 发送电子邮件，SMTP服务器不需要身份验证
			/// </summary>
			/// <param name="smtpServer"></param>
			/// <param name="port"></param>
			/// <param name="mailMessage"></param>
			/// <returns></returns>
			public  bool SendEmail(string smtpServer,int port,MailMessage mailMessage) {
				return SendEmail(smtpServer,port,false,"","",mailMessage);
			}

			/// <summary>
			/// 发送电子邮件，SMTP服务器需要身份验证
			/// </summary>
			/// <param name="smtpServer"></param>
			/// <param name="port"></param>
			/// <param name="username"></param>
			/// <param name="password"></param>
			/// <param name="mailMessage"></param>
			/// <returns></returns>
			public bool SendEmail(string smtpServer,int port,string username,string password,MailMessage mailMessage) {
				return SendEmail(smtpServer,port,false,username,password,mailMessage);
			}

			private  bool SendEmail(string smtpServer,int port,bool ESmtp,string username,string password,MailMessage mailMessage) { 
				if (Connect(smtpServer,port)==false)//测试连接服务器是否成功
					return false;

				string priority=GetPriorityString(mailMessage.Priority);
				bool Html=(mailMessage.BodyFormat==MailFormat.HTML);
				   
				string[] SendBuffer;
				string SendBufferstr;

				//进行SMTP验证，现在大部分SMTP服务器都要认证
				if(ESmtp) {
					SendBuffer=new String[4];
					SendBuffer[0]="EHLO " + smtpServer + CRLF;
					SendBuffer[1]="AUTH LOGIN" + CRLF;
					SendBuffer[2]=Base64Encode(username) + CRLF;
					SendBuffer[3]=Base64Encode(password) + CRLF;
					if(!Dialog(SendBuffer,"SMTP服务器验证失败，请核对用户名和密码。"))
						return false;
				}else {
					//不需要身份认证
					SendBufferstr="HELO " + smtpServer + CRLF;
					if(!Dialog(SendBufferstr,""))
						return false;
				}

				//发件人地址
				SendBufferstr="MAIL FROM:<" + mailMessage.From + ">" + CRLF;
				if(!Dialog(SendBufferstr,"发件人地址错误，或不能为空"))
					return false;

				//收件人地址
				SendBuffer=new string[mailMessage.Recipients.Count];
				for(int i=0;i<mailMessage.Recipients.Count;i++) {
					SendBuffer[i]="RCPT TO:<" +(string)mailMessage.Recipients[i] +">" + CRLF;
				}

				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() +">" + CRLF;

					}

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

				SendBufferstr="DATA" + CRLF;
				if(!Dialog(SendBufferstr,""))
					return false;

				//发件人姓名
				SendBufferstr="From:" + mailMessage.FromName + "<" +mailMessage.From +">" +CRLF;

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

				//SendBufferstr+="To:" + ToName + "<" + Recipient[0] +">" +CRLF;
				//至少要有一个收件人
				if (mailMessage.Recipients.Count==0) {
					return false;
				}
				else {
					SendBufferstr += "To:=?"+mailMessage.Charset.ToUpper()+"?B?"+
					Base64Encode((string)mailMessage.Recipients[0])+"?="+"<"+(string)mailMessage.Recipients[0]+">"+CRLF;
				}
				 
				//SendBufferstr+="CC:";
				//for(int i=0;i<Recipient.Count;i++)
				//{
				// SendBufferstr+=Recipient[i].ToString() + "<" + Recipient[i].ToString() +">,";
				//}
				//SendBufferstr+=CRLF;

				SendBufferstr+=
				((mailMessage.Subject==String.Empty || mailMessage.Subject==null)?"Subject:":((mailMessage.Charset=="")?("Subject:" + 
				mailMessage.Subject):("Subject:" + "=?" + mailMessage.Charset.ToUpper() + "?B?" +
				Base64Encode(mailMessage.Subject) +"?="))) + CRLF;
				SendBufferstr+="X-Priority:" + priority + CRLF;
				SendBufferstr+="X-MSMail-Priority:" + priority + CRLF;
				SendBufferstr+="Importance:" + priority + CRLF;
				SendBufferstr+="X-Mailer: Lion.Web.Mail.SmtpMail Pubclass [cn]" + CRLF;
				SendBufferstr+="MIME-Version: 1.0" + CRLF;
				if(mailMessage.Attachments.Count!=0) {
					SendBufferstr+="Content-Type: multipart/mixed;" + CRLF;
					SendBufferstr += " boundary=\"====="+
					(Html?"001_Dragon520636771063_":"001_Dragon303406132050_")+"=====\""+CRLF+CRLF;
				}

				if(Html) {
					if(mailMessage.Attachments.Count==0) {
						SendBufferstr += "Content-Type: multipart/alternative;"+CRLF;//内容格式和分隔符
						SendBufferstr += " boundary=\"=====003_Dragon520636771063_=====\""+CRLF+CRLF;
						SendBufferstr += "This is a multi-part message in MIME format."+CRLF+CRLF;
					}else {
						SendBufferstr +="This is a multi-part message in MIME format."+CRLF+CRLF;
						SendBufferstr += "--=====001_Dragon520636771063_====="+CRLF;
						SendBufferstr += "Content-Type: multipart/alternative;"+CRLF;//内容格式和分隔符
						SendBufferstr += " boundary=\"=====003_Dragon520636771063_=====\""+CRLF+CRLF; 
					}

					SendBufferstr += "--=====003_Dragon520636771063_====="+CRLF;
					SendBufferstr += "Content-Type: text/plain;"+ CRLF;
					SendBufferstr += ((mailMessage.Charset=="")?(" charset=\"iso-8859-1\""):(" charset=\"" + 

					mailMessage.Charset.ToLower() + "\"")) + CRLF;
					SendBufferstr+="Content-Transfer-Encoding: base64" + CRLF + CRLF;
					SendBufferstr+= Base64Encode("邮件内容为HTML格式，请选择HTML方式查看") + CRLF + CRLF;

					SendBufferstr += "--=====003_Dragon520636771063_====="+CRLF;


					SendBufferstr+="Content-Type: text/html;" + CRLF;
					SendBufferstr+=((mailMessage.Charset=="")?(" charset=\"iso-8859-1\""):(" charset=\"" + 
					mailMessage.Charset.ToLower() + "\"")) + CRLF;
					SendBufferstr+="Content-Transfer-Encoding: base64" + CRLF + CRLF;
					SendBufferstr+= Base64Encode(mailMessage.Body) + CRLF + CRLF;
					SendBufferstr += "--=====003_Dragon520636771063_=====--"+CRLF;
				}else {
					if(mailMessage.Attachments.Count!=0) {
						SendBufferstr += "--=====001_Dragon303406132050_====="+CRLF;
					}

					SendBufferstr+="Content-Type: text/plain;" + CRLF;
					SendBufferstr+=((mailMessage.Charset=="")?(" charset=\"iso-8859-1\""):(" charset=\"" +
					mailMessage.Charset.ToLower() + "\"")) + CRLF;
					SendBufferstr+="Content-Transfer-Encoding: base64" + CRLF + CRLF;
					SendBufferstr+= Base64Encode(mailMessage.Body) + CRLF;
				}
				 
				//SendBufferstr += "Content-Transfer-Encoding: base64"+CRLF;

				if(mailMessage.Attachments.Count!=0) {
					for(int i=0;i<mailMessage.Attachments.Count;i++) {
						string filepath = (string)mailMessage.Attachments[i];
						SendBufferstr += "--====="+ 
						(Html?"001_Dragon520636771063_":"001_Dragon303406132050_") +"====="+CRLF;
							//SendBufferstr += "Content-Type: application/octet-stream"+CRLF;
						SendBufferstr += "Content-Type: text/plain;"+CRLF;
						SendBufferstr += " name=\"=?"+mailMessage.Charset.ToUpper()+"?B?"+
						Base64Encode(filepath.Substring(filepath.LastIndexOf("\\")+1))+"?=\""+CRLF;
						SendBufferstr += "Content-Transfer-Encoding: base64"+CRLF;
						SendBufferstr += "Content-Disposition: attachment;"+CRLF;
						SendBufferstr += " filename=\"=?"+mailMessage.Charset.ToUpper()+"?B?"+
						Base64Encode(filepath.Substring(filepath.LastIndexOf("\\")+1))+"?=\""+CRLF+CRLF;
						SendBufferstr += GetStream(filepath)+CRLF+CRLF;
					}
					SendBufferstr += "--====="+ 
					(Html?"001_Dragon520636771063_":"001_Dragon303406132050_")+"=====--"+CRLF+CRLF;
				} 
				 
				SendBufferstr += CRLF + "." + CRLF;//内容结束

				if(!Dialog(SendBufferstr,"错误信件信息"))
					return false;

				SendBufferstr="QUIT" + CRLF;
				if(!Dialog(SendBufferstr,"断开连接时错误"))
					return false;

				networkStream.Close();
				tcpClient.Close();
				return true;
				}
			}

			 

			public class SmtpMail {
			private static string _SmtpServer;

			/// <summary>
			/// 格式：SmtpAccount:Password@SmtpServerAddress<br>
			/// 或者：SmtpServerAddress<br>
			/// <code>
			/// SmtpMail.SmtpServer="user:[e-mail]";
			/// //或者:
			/// SmtpMail.SmtpServer="smtp.126.com"; 
			/// 或者：
			/// SmtpMail.SmtpServer=SmtpServerHelper.GetSmtpServer("user","12345678","smtp.126.com");
			/// </code>
			/// </summary>
			public static string SmtpServer {
				set { _SmtpServer=value;}
				get { return _SmtpServer;}
			}

			public static bool Send(MailMessage mailMessage,string username,string password) {
				SmtpServerHelper helper=new SmtpServerHelper();
				return helper.SendEmail(_SmtpServer,25,username,password,mailMessage);
			}

			}

	#endregion
}