asp.net 邮件发送 实例源码下载(SmtpClient)

【实例截图】

【核心代码】

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Net.Mail;

namespace Web
{
    public partial class Default : System.Web.UI.Page
    {
        private string host = "smtp.163.com", port = "25", fromemailuser = "xxxxx@163.com", fromemailpass = "xxxxx";
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                format.Items.Add(new ListItem("文本", "0"));
                format.Items.Add(new ListItem("HTML", "1"));
                format.Items[0].Selected = true;

                fromMail.Text = fromemailuser; //发送方邮件
                fromMail.Enabled = false;
            }
        }

        private bool SendMail(string fromMail, string toMail, string ccMail, string bccMail, string subject, string body, string sendMode)
        {
            try
            {
               

                MailAddress from = new MailAddress(fromMail, fromMail);
                MailAddress to = new MailAddress(toMail, toMail);
                System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(from, to);
                // message.Subject = "Using the SmtpClient class.";
                message.Subject = subject;
                message.Body = body;
                // Add a carbon copy recipient.
                if (!string.IsNullOrEmpty(ccMail))
                {
                    MailAddress copy = new MailAddress(ccMail);
                    message.CC.Add(copy);
                }
              

                //附件
                string ServerFileName = "";
                if (this.upfile.PostedFile.ContentLength != 0)
                {
                    string upFileName = this.upfile.PostedFile.FileName;
                    string[] strTemp = upFileName.Split('.');
                    string upFileExp = strTemp[strTemp.Length - 1].ToString();
                    ServerFileName = Server.MapPath(DateTime.Now.ToString("yyyyMMddhhmmss")   "."   upFileExp);
                    this.upfile.PostedFile.SaveAs(ServerFileName);
                    message.Attachments.Add(new Attachment(ServerFileName));
                }




                SmtpClient smtp = new SmtpClient(); //实例化一个SmtpClient
                smtp.DeliveryMethod = SmtpDeliveryMethod.Network; //将smtp的出站方式设为 Network
                smtp.EnableSsl = false;//smtp服务器是否启用SSL加密
                smtp.Host = host; //指定 smtp 服务器地址
                smtp.Port = int.Parse(port); //指定 smtp 服务器的端口，默认是25
                smtp.Credentials = new System.Net.NetworkCredential(fromemailuser, fromemailpass);//认证
                try
                {
                    smtp.Send(message);
                    return true;
                }
                catch (System.Net.Mail.SmtpException ex)
                {
                    return false;
                }

            }
            catch
            {
                return false;
            }
        }

        protected void send_Click(object obj, EventArgs e)
        {
            bool flag = SendMail(fromMail.Text, toMail.Text, ccMail.Text, bccMail.Text, subject.Text, body.Text, format.SelectedValue);
            if (flag == true)
            {
                Response.Write("<script>alert('发送成功!');</script>");
            }
            else
            {
                Response.Write("<script>alert('发送失败!');</script>");
            }


        }
    }
}