本文例項講述了C#實現的自定義郵件傳送類。分享給大家供大家參考，具體如下：

/// <summary>
  /// 傳送郵件類 的摘要說明
   /// </summary> 
   class SendMail
   {
       #region 資料成員
       //收件人地址
       private string m_To = "";
       //發件人地址
       private string m_From = "";
       //郵件標題
       private string m_Subject = "";
       //郵件正文
       private
 
 string m_Body = "";
       //傳送伺服器名或地址
       private string m_Host = "";
       //發件人使用者名稱
       private string m_UserName = "";
       //發件人密碼
       private string m_Password = "";
       //郵件附件
       private string m_File = "";
       #endregion

       #region 建構函式
       /// <summary>
       /// 建構函式過載
 

       /// </summary>
       /// <param name="to">收件人地址</param>
       /// <param name="from">發件人地址</param>
       /// <param name="subject">郵件標題</param>
       /// <param name="body">郵件正文</param>
       /// <param name="host">傳送郵件伺服器名或地址</param>
       /// <param name="userName">
 
發件人使用者名稱</param>
       /// <param name="password">發件人密碼</param>
       public SendMail(string to, string from, string subject, string body, string host, string userName, string password, string fileName)
       {
           m_To = to;
           m_From = from;
           m_Subject = subject;
           m_Body = body;
           m_Host = host;
           m_UserName = userName;
           m_Password = password;
           m_File = fileName;
       }
       #endregion

       #region 資料屬性
       //收件人地址
       public string TO
       {
           get
           {
               return m_To;
           }
           set
           {
               m_To = value;
           }
       }
       //發件人地址
       public string From
       {
           get
           {
               return m_From;
           }
           set
           {
               m_From = value;
           }
       }
       //郵件標題
       public string Subject
       {
           get
           {
               return m_Subject;
           }
           set
           {
               m_Subject = value;
           }
       }
       //郵件正文
       public string Body
       {
           get
           {
               return m_Body;
           }
           set
           {
               m_Body = value;
           }
       }
       //伺服器地址（名）
       public string Host
       {
           get
           {
               return m_Host;
           }
           set
           {
               m_Host = value;
           }
       }
       //發件人的使用者名稱
       public string UserName
       {
           get
           {
               return m_UserName;
           }
           set
           {
               m_UserName = value;
           }
       }
       //發件人的密碼
       public string Password
       {
           get
           {
               return m_Password;
           }
           set
           {
               m_Password = value;
           }
       }
       //郵件附件
       public string File
       {
           get
           {
               return m_File;
           }
           set
           {
               m_File = value;
           }
       }
       #endregion


       /// <summary>
       /// 傳送郵件
       /// </summary>
       /// <returns>傳送是否成功</returns>
       public bool Send()
       {
           try
           {
               //獲取所有的收件人地址
               char[] ch = { ',' };
               string[] address = m_To.Split(ch);
               MailAddressCollection allAddress = new MailAddressCollection();
               for (int i = 0; i < address.Length; i++)
               {
                   //收件人地址
                   MailAddress toAddress = new MailAddress(address[i]);
                   allAddress.Add(toAddress);
                   //發件人地址
                   MailAddress fromAddress = new MailAddress(m_From);
                   //定義郵件訊息
                   MailMessage msg = new MailMessage(fromAddress, toAddress);
                   //郵件標題
                   msg.Subject = m_Subject;
                   //郵件正文
                   msg.Body = m_Body;
                   //獲取所有郵件附件
                   char[] cr = { ';' };
                   string[] file = m_File.Split(cr);
                   for (int n = 0; n < file.Length; n++)
                   {
                       if (file[n] != "")
                       {
                           //附件物件
                           Attachment data = new Attachment(file[n], MediaTypeNames.Application.Octet);
                           //附件資料
                           ContentDisposition disposition = data.ContentDisposition;
                           disposition.CreationDate = System.IO.File.GetCreationTime(file[n]);
                           disposition.ModificationDate = System.IO.File.GetLastWriteTime(file[n]);
                           disposition.ReadDate = System.IO.File.GetLastAccessTime(file[n]);
                           //加入郵件附件
                           msg.Attachments.Add(data);
                       }
                   }
                   //使用簡單郵件傳輸協議來傳送郵件
                   SmtpClient sendMail = new SmtpClient();
                   //傳送郵件的伺服器名或地址
                   sendMail.Host = m_Host;
                   //驗證發件人的身份
                   sendMail.Credentials = new NetworkCredential(m_UserName, m_Password);
                   //處理待發送郵件的方法
                   sendMail.DeliveryMethod = SmtpDeliveryMethod.Network;
                   //傳送郵件
                   sendMail.Send(msg);
               }
               return true;
           }
           catch (Exception ex)
           {
               Console.WriteLine(ex.ToString());
               return false;
           }
       }
   }// end of  class SendMail