C# 邮件发送

protected void Page_Load(object sender, EventArgs e)
  }, "hehe", "nihao", 1, 2, null));
        /*
        String subject = "nihao";
        String strBody = "hehehehe";        MailMessage message = new MailMessage();
        message.To.Add(new MailAddress("//收件人的mail地址
        message.From = new MailAddress("/发件人的mail地址
        message.Subject = subject; //mail主题        message.IsBodyHtml = false;//送信格式是否用html格式
        message.BodyEncoding = System.Text.Encoding.UTF8;//mail内容字体格式
        message.Body = strBody;//mail本文
        message.Priority = MailPriority.High;//送信的优先级
        SmtpClient smt = new SmtpClient("smtp.163.com", 25);//设定邮件服务器的端口
        //message.Attachments.Add(new Attachment(filename));//添加附件
        smt.Send(message);//实现送信
        */
    }    /**/
    /// <summary>
    /// 功能：发送邮件,返回字符串：“发送成功”否则返回错误代码。
    /// 创建：2007-08-23
    /// </summary>
    /// <param name="MailTo">MailTo为收信人地址</param>
    /// <param name="Subject">Subject为标题</param>
    /// <param name="Body">Body为信件内容</param>
    /// <param name="BodyFormat">BodyFormat为信件内容格式:0为Text,1为Html</param>
    /// <param name="Priority">Priority为优先级:0为低,1为中,2为高</param>
    /// <param name="Attachments">Attachment为附件,为null则不发送</param>
    public static string SendMail(System.Collections.ArrayList MailTo, string Subject, string Body, int BodyFormat, int Priority, string Attachments)
    {
        string result;        SmtpClient mail = new SmtpClient();
        //发送方式
        mail.DeliveryMethod = SmtpDeliveryMethod.Network;
        //smtp服务器
        mail.Host = "smtp.163.com";
        //用户名凭证               
        mail.Credentials = new System.Net.NetworkCredential("用户名", "密码");
        //邮件信息
        MailMessage message = new MailMessage();
        //发件人
        message.From = new MailAddress("用户名@163.com");
        //收件人
        foreach (object item in MailTo)
        {
            message.To.Add(item.ToString());
        }
        //主题
        message.Subject = Subject;
        //内容
        message.Body = Body;
        //正文编码
        message.BodyEncoding = System.Text.Encoding.UTF8;
        //设置为HTML格式
        message.IsBodyHtml = true;
        //优先级
        message.Priority = MailPriority.High;        try
        {
            mail.Send(message);
            result = "发送成功";
            return result;
        }
        catch (Exception e)
        {
            result = e.ToString();
        }
        return result;
    }