牛腩购物 19：用户密码找回功能 smtp 发信 qq邮箱

smtp 发信类：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Mail;
using System.Net;

namespace Niunan.Shop.Utility
{
    /// <summary>邮件发送类
    ///
    /// </summary>
    public class email
    {
         //using System.Net.Mail;
         // using System.Net;

        /// <summary>发送email,默认是25端口.用法：SendMail("邮件标题", "你的密码是：" , 收件人地址, "发信人完整邮箱地址", "发信人完整邮箱地址", "密码", "smtp.qq.com（QQ的smtp地址，不同的域名邮箱地址不通）")
        ///
        /// </summary>
        /// <param name="title">邮件标题</param>
        /// <param name="body">邮件内容</param>
        /// <param name="toAdress">收件人</param>
        /// <param name="fromAdress">发件人</param>
        /// <param name="userName">发件用户名</param>
        /// <param name="userPwd">发件密码</param>
        /// <param name="smtpHost">smtp地址</param>
        public static void SendMail(string title, string body, string toAdress, string fromAdress,
                              string userName, string userPwd, string smtpHost)
        {
            try
            {
                MailAddress to = new MailAddress(toAdress);
                MailAddress from = new MailAddress(fromAdress);
                System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(from, to);
                message.IsBodyHtml = true; // 如果不加上这句那发送的邮件内容中有HTML会原样输出
                message.Subject = title; message.Body = body;
                SmtpClient smtp = new SmtpClient();
                smtp.UseDefaultCredentials = true;
                smtp.Port = 25;
                smtp.Credentials = new NetworkCredential(userName, userPwd);
                smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
                smtp.Host = smtpHost;
                //message.To.Add(toAdress);  //用 To.Add方法能增加收件箱的号码
                smtp.Send(message);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

    }
}

使用方法：  点击获取密码之后

protected void btnGet_Click(object sender, EventArgs e)
       {
           string username = Request.QueryString["username"];
           string answer = txtAnswer.Text.Trim();
           if (answer.Length == 0)
           {
               Niunan.Shop.Utility.Tool.alert("请填写答案", this.Page);
               return;
           }
           if (string.IsNullOrEmpty(username))
           {
               Niunan.Shop.Utility.Tool.alert("用户名不能为空", "getpwd1.aspx", this.Page);
               return;
           }

           Niunan.Shop.Model.User u = new DAL.UserDAO().GetModel(username);
           if (u != null)
           {
               if (answer == u.answer)  //如果答案相同，开始发信
               {
                   Niunan.Shop.Utility.email.SendMail("您在 牛腩购物网的密码已经取回", "您的密码是:" + u.password, u.email, 

"1727050508@qq.com", "1727050508@qq.com", "这里输入邮箱的密码", "smtp.qq.com");
                   Niunan.Shop.Utility.Tool.alert("您的密码已经发送到您的邮箱"+u.email+"中", "default.aspx", this.Page);
               }
               else
               {
                   Niunan.Shop.Utility.Tool.alert("答案错误",   this.Page);
                   return;
               }
           }
           else
           {
               Niunan.Shop.Utility.Tool.alert("用户名不存在", "getpwd1.aspx", this.Page);
               return;
           }
       }