private void SendMail()
        {
            MailHelper mh = new MailHelper();
            mh.To = "xxx@xx.com";
            mh.CC = "xxx@xx.com";
            mh.BCC = "xxx@xx.com";
            mh.Subject = string.Format(CommonStatic.MAIL_SUBJECT, DateTime.Now.ToString("yyyyMMdd")).ToString();

            ArrayList file_name = new ArrayList();
            file_name.Add(string.Format(CommonStatic.EXCEL_NAME_ONE, DateTime.Now.ToString("yyyyMMdd")) + CommonStatic.EXCEL_NAME_END);
            file_name.Add(string.Format(CommonStatic.EXCEL_NAME_TWO, DateTime.Now.ToString("yyyyMMdd")) + CommonStatic.EXCEL_NAME_END);

            mh.Attachments = file_name;

            mh.SendEmail(true);
        }

            MailMessage msgMail = new MailMessage();
            msgMail.From = new MailAddress(m_from);
            msgMail.To.Add(this.m_to);
            if (this.cc.Length > 0)
            {
                msgMail.CC.Add(this.cc);
            }
            if (this.bcc.Length > 0)
            {
                msgMail.Bcc.Add(this.bcc);
            }
            msgMail.Subject = m_subject;
            msgMail.IsBodyHtml = m_IsBodyHtml;

            if (m_Attachments != null)
            {
                for (int i = 0; i < m_Attachments.Count; i++)
                {
                    System.Net.Mail.Attachment mailAttachment = new System.Net.Mail.Attachment(m_Attachments[i].ToString());
                    msgMail.Attachments.Add(mailAttachment);
                }
            }

            msgMail.Body = m_body;
            msgMail.BodyEncoding = m_MailEncoding;
            msgMail.SubjectEncoding = m_MailEncoding;


            if (verify)
            {
                msgMail.Headers.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1"); //basic authentication
                msgMail.Headers.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", m_smtpUserName); //set your username here
                msgMail.Headers.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", m_smtpPassword); //set your password here
            }

            SmtpClient smtp = new SmtpClient(m_smtpServer); //smtp邮件服务器
            smtp.Send(msgMail);
            msgMail.Dispose();