using System; 
using System.Net.Sockets;//用于處理網絡連接 
using System.IO; //用于處理附件的包 
using System.Text;//用于處理文本編碼 


namespace QSendMail
{
	/// <summary>
	/// SendMail 的摘要說明。
	/// </summary>
	public class SendMail
	{
		public SendMail()
		{
			//
			// TODO: 在此處添加構造函數邏輯
			//
			
			
		}

		/// <summary>
		/// SMTP服務器域名 
		/// </summary>
		private String server;//SMTP服務器域名 
		private String subject;//主題 
		private String body;//文本內容 
		private String from;//發件人地址 
		private String to;//收件人地址 
		
		private String errMsg;
		public string MAILserver
		{
			get
			{
				return this.server;
			}
			set
			{
				this.server=value;
			}
		}
		/// <summary>
		/// 主題
		/// </summary>
		public string MAILsubject
		{
			get
			{
				return this.subject;
			}
			set
			{
				this.subject=value;
			}
		}

		/// <summary>
		/// 文本內容
		/// </summary>
		public  string MAILbody
		{
			get
			{
				return this.body;
			}
			set
			{
				this.body=value;
			}
		}
		/// <summary>
		/// 發件人地址
		/// </summary>
		public string MAILfrom
		{
			get
			{
				return this.from;
			}
			set
			{
				this.from=value;
			}
		}

		/// <summary>
		/// 收件人地址
		/// </summary>
		public string MAILto
		{
			get
			{
				return this.to;
			}
			set
			{
				this.to=value;
			}
		}
		public bool Send()
		{
			string Data;
			byte[] szData;
			string CRLF = "\r\n";

			//與郵件服務器建立連接
			TcpClient SmtpServ = new TcpClient(server,25);		
			if(SmtpServ==null)
				return false;
			NetworkStream NetStrm = SmtpServ.GetStream();
			StreamReader RdStrm= new StreamReader(SmtpServ.GetStream());
			if(RdStrm==null)
				return false;
			errMsg=RdStrm.ReadLine();

			//開始與郵件服務器會話
			Data = "HELO "+from + CRLF; 
			szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
			NetStrm.Write(szData,0,szData.Length);
			errMsg=RdStrm.ReadLine();

			//告訴郵件服務器發件人的地址
			Data = "MAIL FROM: " + "<" + from + ">" + CRLF;
			szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
			NetStrm.Write(szData,0,szData.Length);
			errMsg=RdStrm.ReadLine();

			//告訴郵件服務器收件人的地址
			Data = "RCPT TO: " + "<" + to + ">" + CRLF;
			szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
			NetStrm.Write(szData,0,szData.Length);
			errMsg=RdStrm.ReadLine();

			//開始發送數據
			Data = "DATA " + CRLF;
			szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
			NetStrm.Write(szData,0,szData.Length);
			errMsg=RdStrm.ReadLine();
 
			//發送主題
			Data = "SUBJECT: " + subject + CRLF ;
			Data = "X-mailer: Foxmail 4.2 [cn]"+CRLF ;
			Data = "Mime-Version: 1.0"+CRLF ;
			Data = "Content-Type: text/plain"+CRLF ;
			Data = "charset: GB2312"+CRLF ;
			Data = "Content-Transfer-Encoding: quoted-printable"+CRLF ;
			Data = "Date: "+DateTime.Now+CRLF ;

			//發送內容
			Data = Data+ body + CRLF ;
			//結束發送
			Data = Data+ "." + CRLF;
			szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
			NetStrm.Write(szData,0,szData.Length);
			errMsg=RdStrm.ReadLine(); 

			//與郵件服務器斷開連接
			Data = "QUIT " + CRLF;
			szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
			NetStrm.Write(szData,0,szData.Length);
			errMsg=RdStrm.ReadLine(); 
			//關閉連接
			NetStrm.Close();
			RdStrm.Close();
			errMsg="發送成功";
			return true;
		}

	}
}