基于Socket与NET.WEBMAIL发送邮件的源代码（一）

去年8月时，因为需要做了一个Email收发系统，收邮件的太复杂了，贴不下来。发邮件分别写了两种发送方式，一种是基于NET WebMail的需要验证的EmailSend，一种是使用Socket直接基于SMTP发送的。

掌握基于SMTP协议使用Socket Coding的基本原理后，写这一类似的东西都能触类旁通了。比如基于FTP的Downlload，UpLoad的组件等等。

下面对即将看到的4个Class作个说明. 
     EmailInfo ：构成Email的基本类，相当于System.Web.Mail.MailMessage（偶并不是不喜欢MailMessage，而是因为在接收Email时需要使用自己定义的EmailInfo）
    SendEmailByNetWebMail：封装WebMail的类
    SendEmailBySocket：基于SMTP协议直接使用SOCKET发送的类
    EmailSender：对外开放使用发送Email的类。

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

namespace NewEgg.EmailRSM
{
    /**//// <summary>
    /// Summary description for EmailInfo.
    /// </summary>
    public class EmailInfo
    {
        private ArrayList attachments = new ArrayList ();        
        private string from = "";
        private string to = "";
        private string fromName = "";
        private string toName = "";
        private string cc="";
        private string bcc="";
        private string subject = "";
        private string body = "";
        private string htmlBody = "";
        private bool isHtml = false;
        private string languageEncoding = "UTF-8";
        private string encoding = "8bit";
        private int priority = 3;
        private string m_toperson="";

        public EmailInfo()
        {
            //
            // TODO: Add constructor logic here
            //
        }
        
        /**//// <summary>
        /// 发件人地址
        /// </summary>
        public string From 
        {
            get { return from; }
            set { if (value != from) from = value;}
        } 

        /**//// <summary>
        /// 收件人地址
        /// </summary>
        public string To 
        {
            get { return to; }
            set { if (value != to) to = value;}
        } 

        /**//// <summary>
        /// 发件人姓名
        /// </summary>
        public string FromName 
        {
            get { return fromName; }
            set { if (value != fromName) fromName = value; }
        } 

        /**//// <summary>
        /// 收件人姓名
        /// </summary>
        public string ToName 
        {
            get { return toName; }
            set { if (value != toName) toName = value; }
        } 
        
        /**//// <summary>
        /// 收信的个人
        /// </summary>
        public string ToPerson 
        {
            get { return m_toperson ; }
            set { if (value != m_toperson) m_toperson = value; }
        } 

        /**//// <summary>
        /// 抄送
        /// </summary>
        public string CC 
        {
            get { return cc; }
            set { if (value != cc) cc = value; }
        }

        /**//// <summary>
        /// 暗送
        /// </summary>
        public string BCC 
        {
            get { return bcc; }
            set { if (value != bcc) bcc = value; }
        }

        /**//// <summary>
        /// 邮件的主题
        /// </summary>
        public string Subject 
        {
            get { return subject; }
            set { if (value != subject) subject = value; }
        } 

        /**//// <summary>
        /// 邮件正文
        /// </summary>
        public string Body 
        {
            get { return body; }
            set { if (value != body) body = value; }
        } 

        /**//// <summary>
        /// 超文本格式的邮件正文
        /// </summary>
        public string HtmlBody 
        {
            get { return htmlBody; }
            set { if (value != htmlBody) htmlBody = value; }
        } 

        /**//// <summary>
        /// 是否是html格式的邮件
        /// </summary>
        public bool IsHtml 
        {
            get { return isHtml; }
            set { if (value != isHtml) isHtml = value; }
        } 

        /**//// <summary>
        /// 语言编码 [默认为GB2312]
        /// </summary>
        public string LanguageEncoding 
        {
            get { return languageEncoding; }
            set { if (value != languageEncoding) languageEncoding = value; }
        } 

        /**//// <summary>
        /// 邮件编码 [默认为8bit]
        /// </summary>
        public string MailEncoding 
        {
            get { return encoding; }
            set { if (value != encoding) encoding = value; }
        } 

        /**//// <summary>
        /// 邮件优先级 [默认为3]
        /// </summary>
        public int Priority 
        {
            get { return priority; }
            set { if (value != priority) priority = value; }
        } 

        /**//// <summary>
        /// 附件 [AttachmentInfo]
        /// </summary>
        public ArrayList Attachments 
        {
            get { return attachments; }
        } 
    }
}

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

namespace NewEgg.EmailRSM
{
    /**//// <summary>
    /// Summary description for EmailSender.
    /// </summary>
    public class EmailSender
    {
        private SendClassType m_SendClassType=SendClassType.NetWebMail ;
        private string m_Server="";
        private string m_UserId="";
        private string m_Pwd="";
        private int port = 25;
        private EmailInfo m_Emailinfo=null;

        public EmailSender()
        {
            //
            // TODO: Add constructor logic here
            //
        }

        /**//// <summary>
        /// 选择采用哪种发送方式的枚举类型
        /// </summary>
        public enum SendClassType
        {
            NetWebMail,
            SocketSend
        }

        parameres of this class#region  parameres of this class
        /**//// <summary>
        /// 
        /// </summary>
        /// <param name="sendclassType">发送邮件采用哪种方式</param>
        public EmailSender(SendClassType sendclassType)
        {
            m_SendClassType=sendclassType;            
        }
        /**//// <summary>
        /// check the type of send email type
        /// </summary>
        public SendClassType ChoiceSendType 
        {
            get { return m_SendClassType; }
            set { if (value != m_SendClassType) m_SendClassType = value; }
        } 
        /**//// <summary>
        /// Exchange server dns & ip
        /// </summary>
        public string Server 
        {
            get { return m_Server; }
            set { if (value != m_Server) m_Server = value; }
        } 
        /**//// <summary>
        /// userid
        /// </summary>
        public string UserId 
        {
            get { return m_UserId; }
            set { if (value != m_UserId) m_UserId = value; }
        } 
        /**//// <summary>
        /// password
        /// </summary>
        public string PassWord 
        {
            get { return m_Pwd; }
            set { if (value != m_Pwd) m_Pwd = value; }
        } 
        /**//// <summary>
        /// SMTP port [default:25]
        /// </summary>
        public int Port 
        {
            get { return port; }
            set { if (value != port) port = value; }
        }

        /**//// <summary>
        /// EMAIL信息构件
        /// </summary>
        public EmailInfo EmailMessage
        {
            get {return m_Emailinfo;}
            set {m_Emailinfo=value;}
        }
        #endregion
        
        /**//// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public bool SendEmail()
        {
            try
            {
                if(m_SendClassType==SendClassType.SocketSend )
                {
                    SendEmailBySocket emailsend=new SendEmailBySocket();
                    emailsend.Server=m_Server ;
                    emailsend.Port =port ;
                    emailsend.UserName =m_UserId ;
                    emailsend.Password =m_Pwd ;    
                    //emailsend.SendMail(m_Emailinfo);
                    string sMailTo=m_Emailinfo.To ;
                    foreach(string sPerson in sMailTo.Split(';'))
                    {
                        if(sPerson.Trim() !="")
                        {
                            m_Emailinfo.ToPerson  =sPerson;
                            emailsend.SendMail(m_Emailinfo);
                        }
                    }
                    foreach(string sPerson in m_Emailinfo.CC.Split(';'))
                    {
                        if(sPerson.Trim() !="")
                        {
                            m_Emailinfo.ToPerson =sPerson;
                            emailsend.SendMail(m_Emailinfo);
                        }
                    }
                    foreach(string sPerson in m_Emailinfo.BCC.Split(';'))
                    {
                        if(sPerson.Trim() !="")
                        {
                            m_Emailinfo.ToPerson =sPerson;
                            emailsend.SendMail(m_Emailinfo);
                        }
                    }
                }
                else
                {
                    SendEmailByNetWebMail emailsend=new SendEmailByNetWebMail();
                    emailsend.Server=m_Server ;
                    emailsend.UserName =m_UserId ;
                    emailsend.Password =m_Pwd ;    
                    emailsend.SendMail(m_Emailinfo);
                }
                return true;
            }
            catch
            {
                return false;
            }
             
        }

        /**//// <summary>
        /// 
        /// </summary>
        /// <param name="mail"></param>
        /// <returns></returns>
        public bool SendEmail(EmailInfo mail)
        {
             m_Emailinfo =mail; 
            return SendEmail();
        }

        /**//// <summary>
        /// 
        /// </summary>
        /// <param name="sEmailServer"></param>
        /// <param name="sUserId"></param>
        /// <param name="sPwd"></param>
        /// <returns></returns>
        public bool SendEmail(string sEmailServer,string sUserId,string sPwd)
        {
            m_Server=sEmailServer;
            m_UserId=sUserId;
            m_Pwd=sPwd;
            return SendEmail();
        }

        /**//// <summary>
        /// 附件信息
        /// </summary>
        public struct AttachmentInfo
        {
            private string fileName;
            private string bytes;

            /**//// <summary>
            /// 附件的文件名 [如果输入路径，则自动转换为文件名]
            /// </summary>
            public string FileName 
            {
                get { return fileName; }
                set { fileName = Path.GetFileName(value); }
            } 

            /**//// <summary>
            /// 附件的内容 [由经Base64编码的字节组成]
            /// </summary>
            public string Bytes 
            {
                get { return bytes; }
                set { if (value != bytes) bytes = value; }
            } 

            /**//// <summary>
            /// 从流中读取附件内容并构造
            /// </summary>
            /// <param name="ifileName">附件的文件名</param>
            /// <param name="stream">流</param>
            public AttachmentInfo (string ifileName, Stream stream)
            {
                fileName = Path.GetFileName (ifileName);
                byte[] by = new byte [stream.Length];
                stream.Read (by,0,(int)stream.Length); // 读取文件内容
                //格式转换
                bytes = Convert.ToBase64String (by); // 转化为base64编码
            }

            /**//// <summary>
            /// 按照给定的字节构造附件
            /// </summary>
            /// <param name="ifileName">附件的文件名</param>
            /// <param name="ibytes">附件的内容 [字节]</param>
            public AttachmentInfo (string ifileName, byte[] ibytes)
            {
                fileName = Path.GetFileName (ifileName);
                bytes = Convert.ToBase64String (ibytes); // 转化为base64编码
            }

            /**//// <summary>
            /// 从文件载入并构造
            /// </summary>
            /// <param name="path"></param>
            public AttachmentInfo (string path)
            {    
                fileName = Path.GetFileName (path);
                FileStream file = new FileStream (path, FileMode.Open,FileAccess.Read,FileShare.Read);
                byte[] by = new byte [file.Length];
                file.Read (by,0,(int)file.Length); // 读取文件内容
                //格式转换
                bytes = Convert.ToBase64String (by); // 转化为base64编码
                file.Close ();
            }
        }

    }
}