/// <summary>
        /// 发送邮件,附加附件
        /// </summary>
        /// <param name="excelPath">附件地址</param>
        /// <returns></returns>
        public static bool SendSMTPEMail(string strSmtpServer, string strFrom, string strFromPass, string strto, string strSubject, string strBody)
        {
            try
            {
                System.Net.Mail.SmtpClient client = new SmtpClient(strSmtpServer);
                client.Timeout = 9999999;
                client.UseDefaultCredentials = false;
                client.Credentials = new System.Net.NetworkCredential(strFrom, strFromPass);
                client.DeliveryMethod = SmtpDeliveryMethod.Network;

                System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(strFrom, strto, strSubject, strBody);
                //System.Net.Mail.Attachment attachment = new System.Net.Mail.Attachment(excelPath);
                
                //message.Attachments.Add(attachment);
                message.BodyEncoding = System.Text.Encoding.UTF8;
                message.IsBodyHtml = true;
                client.Send(message);
            }
            catch (Exception ex)
            {
                return false;
            }
            return true;
        }