C# 發郵件類可發送附件

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Net.Mail;namespace Ajax.發郵件{    public class GetMail    {         //MailAddress ds = new MailAddress("1738819932@QQ.com");         //   Send(ds, "674580075@qq.com", "郵件主題", "郵件內容","附件名稱");        public GetMail()        { }             /// <summary>        /// 發送電子郵件        /// </summary>        /// <param name="MessageFrom">發件人郵箱地址</param>        /// <param name="MessageTo">收件人郵箱地址</param>        /// <param name="MessageSubject">郵件主題</param>        /// <param name="MessageBody">郵件內容</param>        /// <param name="SUpFile">附件</param>        /// <returns></returns>        public bool Send(MailAddress MessageFrom, string MessageTo, string MessageSubject, string MessageBody, string SUpFile)        {            MailMessage message = new MailMessage();            message.From = MessageFrom;            message.To.Add(MessageTo); //收件人郵箱地址可以是多個以實現群發            message.Subject = MessageSubject;            message.Body = MessageBody;            if (SUpFile != "")            {                               SUpFile = Server.MapPath("~/發郵件/Upfile/" + SUpFile);//獲得附件在本地地址                //將文件進行轉換成Attachments                Attachment data = new Attachment(SUpFile, MediaTypeNames.application.Octet);                // Add time stamp information for the file.                ContentDisposition disposition = data.ContentDisposition;                disposition.CreationDate = System.IO.File.GetCreationTime(SUpFile);                disposition.ModificationDate = System.IO.File.GetLastWriteTime(SUpFile);                disposition.ReadDate = System.IO.File.GetLastaccessTime(SUpFile);                message.Attachments.Add(data);                System.Net.Mime.ContentType  ctype=new System.Net.Mime.ContentType ();             }            message.IsBodyHtml = true; //是否為html格式            message.PRiority = MailPriority.Normal; //發送郵件的優先等級            SmtpClient sc = new SmtpClient();            sc.Host = "smtp.qq.com"; //指定發送郵件的服務器地址或ip            sc.Port = 25; //指定發送郵件端口            sc.Credentials = new System.Net.NetworkCredential("發送郵箱賬號", "賬號密碼"); //指定登錄服務器的try            {                sc.Send(message); //發送郵件            }            catch            {                return false;            }            return true;        }    }}