发送邮件（C#）

        private MailMessage mailMessage;
        private SmtpClient smtpClient;
        private string password;//发件人密码  
        /// <summary>  
        /// 带参数的构造函数,初始化发送邮件的条件
        /// </summary>  
        /// <param name="To">收件人地址</param>  
        /// <param name="From">发件人地址</param>  
        /// <param name="Body">邮件正文</param>  
        /// <param name="Title">邮件的主题</param>  
        /// <param name="Password">发件人密码</param>  
        public SendMail(string[] To, string From, string Body, string Title, string Password)
        {
            mailMessage = new MailMessage();
            foreach (var item in To)
            {
                mailMessage.To.Add(item);
            }
            mailMessage.From = new System.Net.Mail.MailAddress(From);
            mailMessage.Subject = Title;
            mailMessage.Body = Body;
            mailMessage.IsBodyHtml = true;
            mailMessage.BodyEncoding = System.Text.Encoding.UTF8;
            mailMessage.Priority = System.Net.Mail.MailPriority.Normal;
            this.password = Password;
        }
        /// <summary>  
        /// 添加附件  
        /// </summary>  
        public void Attachments(string Path)
        {
            string[] path = Path.Split(',');
            Attachment data;
            ContentDisposition disposition;
            for (int i = 0; i < path.Length; i++)
            {
                data = new Attachment(path[i], MediaTypeNames.Application.Octet);//实例化附件  
                disposition = data.ContentDisposition;
                disposition.CreationDate = System.IO.File.GetCreationTime(path[i]);//获取附件的创建日期  
                disposition.ModificationDate = System.IO.File.GetLastWriteTime(path[i]);//获取附件的修改日期  
                disposition.ReadDate = System.IO.File.GetLastAccessTime(path[i]);//获取附件的读取日期  
                mailMessage.Attachments.Add(data);//添加到附件中  
            }
        }
        /// <summary>  
        /// 异步发送邮件  
        /// </summary>  
        /// <param name="CompletedMethod"></param>  
        public void SendAsync(SendCompletedEventHandler CompletedMethod)
        {
            if (mailMessage != null)
            {
                smtpClient = new SmtpClient();
                smtpClient.Credentials = new System.Net.NetworkCredential(mailMessage.From.Address, password);//设置发件人身份的票据  
                smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
                smtpClient.Host = "smtp." + mailMessage.From.Host;
                smtpClient.SendCompleted += new SendCompletedEventHandler(CompletedMethod);//注册异步发送邮件完成时的事件  
                smtpClient.SendAsync(mailMessage, mailMessage.Body);
            }
        }
        /// <summary>  
        /// 发送邮件  
        /// </summary>  
        public void Send()
        {
            if (mailMessage != null)
            {
                using (smtpClient = new SmtpClient())
                {
                    smtpClient.Timeout = 9999999;
                    smtpClient.EnableSsl = true;
                    smtpClient.UseDefaultCredentials = false;
                    smtpClient.Credentials = new System.Net.NetworkCredential(mailMessage.From.Address, password);//设置发件人身份的票据  
                    smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
                    smtpClient.Host = "smtp." + mailMessage.From.Host;
                    smtpClient.Send(mailMessage);
                    mailMessage.Attachments.Dispose();
                }
            }
        }