WebForm发送邮件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Net.Mail;
using System.Configuration;
using System.Net;
using System.Reflection;
using System.Text;

namespace SendMailMessage.Uitls
{  
    public class EMail
    {
        // 实例化一个邮件类
        MailMessage _mailMessage = new MailMessage();
        /// <summary>
        /// 发件使用的邮箱地址
        /// </summary>
        private string _fromEmail = ConfigurationManager.AppSettings["EmailSender"].ToString();

        /// <summary>
        /// 发件邮箱地址密码
        /// </summary>
        private string _senderPassword = ConfigurationManager.AppSettings["EmailServer_Pwd"].ToString();

        /// <summary>
        /// 显示在邮件上的发件人名称
        /// </summary>
        private string _displayName = ConfigurationManager.AppSettings["EmailSenderName"].ToString();

        /// <summary>
        /// 发件邮箱使用的服务器
        /// </summary>
        private string _smtp = ConfigurationManager.AppSettings["EmailServer"].ToString();

        /// <summary>
        /// 邮件的接收者
        /// </summary>
        private string ToEmail { set; get; }

        /// <summary>
        /// 抄送
        /// </summary>
        private string CC { set; get; }

        /// <summary>
        /// 密送
        /// </summary>
        private string Bcc { set; get; }

        /// <summary>
        /// 邮件标题
        /// </summary>
        private string Subject { set; get; }

        /// <summary>
        /// 邮件正文
        /// </summary>
        private string Body { set; get; }

        /// <summary>
        /// 附件
        /// </summary>
        private string Attachments { set; get; }



        public EMail(string toEmail,  string subject, string body)
        {           
            ToEmail = toEmail;
            Subject = subject;
            Body = body;
        }

        public EMail(string toEmail, string cc, string bcc, string subject, string body, string attachments)
        {

            CC = cc;
            Bcc = bcc;
            ToEmail = toEmail;
            Subject = subject;
            Body = body;
            Attachments = attachments;

        }
        /// <summary>
        /// 发送email
        /// </summary>
        /// <param name="toEmail">邮件的接收者，支持群发，多个地址之间用半角逗号分开</param>    
        /// <param name="subject">主题</param>
        /// <param name="body">正文</param>    
        public static bool SendEmail(string toEmail, string subject, string body)
        {
            EMail email = new EMail(toEmail, subject, body);
            return email.Send();
        }
        
        /// <summary>
        /// 发送email
        /// </summary>
        /// <param name="toEmail">邮件的接收者，支持群发，多个地址之间用半角逗号分开</param>
        /// <param name="cc">抄送，多个地址之间用半角逗号分开</param>
        /// <param name="bcc">密送，多个地址之间用半角逗号分开</param>
        /// <param name="subject">主题</param>
        /// <param name="body">正文</param>
        /// <param name="attachments">附件地址</param>
        public static bool SendEmail(string toEmail, string cc, string bcc, string subject, string body, string attachments)
        {
            EMail email = new EMail(toEmail, cc, bcc, subject, body, attachments);
            return email.Send();
        }


        /// <summary>
        /// 邮件发送
        /// </summary>
        public bool Send()
        {
            Type type = typeof(SmtpClient);
            SmtpClient _smtpClient = new SmtpClient();           

            bool result = false;

            try
            {
                // 将smtp的出站方式设为Network
                _smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;

                // smtp服务器是否启用SSL加密
                _smtpClient.EnableSsl = false;

                // 指定smtp服务器地址
                _smtpClient.Host = _smtp;

                // 指定smtp服务器的端口，默认是25，如果采用默认端口，可省去
                //smtp.Port = 25;             

                // 如果你的SMTP服务器不需要身份认证，则使用下面的方式，不过，目前基本没有不需要认证的了
                //smtp.UseDefaultCredentials = true;

                // 如果需要认证，则用下面的方式
                _smtpClient.Credentials = new NetworkCredential(_fromEmail, _senderPassword);

                // 邮件的优先级，分为Low、Normal、 High，通常用Normal即可
                _mailMessage.Priority = MailPriority.High;

                // 收件方看到的邮件来源；第一个参数是发信人邮件地址，第二参数是发信人显示的名称，第三个参数是第二个参数所使用的编码，如果指定不正确，则对方收到后显示乱码，936是简体中文的codepage值
                _mailMessage.From = new MailAddress(_fromEmail, _displayName, Encoding.GetEncoding(936));

                // ReplyTo 表示对方回复邮件时默认的接收地址，即：你用一个邮箱发信，但却用另一个来收信，后两个参数的意义，同From
                _mailMessage.ReplyTo = new MailAddress(_fromEmail, _displayName, Encoding.GetEncoding(936));

                // 邮件的接收者，支持群发，多个地址之间用半角逗号分开
                _mailMessage.To.Add(ToEmail);

                // 抄送
                if (!string.IsNullOrEmpty(CC))
                {
                    _mailMessage.CC.Add(CC);
                }

                // 密送
                if (!string.IsNullOrEmpty(Bcc))
                {
                    _mailMessage.Bcc.Add(Bcc);
                }

                // 邮件标题
                _mailMessage.Subject = Subject;

                // 这里非常重要，如果你的邮件标题包含中文，这里一定要指定，否则对方收到的极有可能是乱码
                _mailMessage.SubjectEncoding = Encoding.GetEncoding(936);

                // 邮件正文是否是HTML格式
                _mailMessage.IsBodyHtml = true;

                // 邮件正文的编码，设置不正确，接收者会收到乱码
                _mailMessage.BodyEncoding = Encoding.GetEncoding(936);

                // 邮件正文
                _mailMessage.Body = Body;

                // 附件
                if (!string.IsNullOrEmpty(Attachments))
                {
                    string[] attachmentsArray = Attachments.Split(',');

                    for (int i = 0; i < attachmentsArray.Length; i++)
                    {
                        _mailMessage.Attachments.Add(new Attachment(attachmentsArray[i]));
                    }
                }

                // 发送邮件
                _smtpClient.Send(_mailMessage);
                result = true;
            }
            catch (Exception ex)
            {
                result = false;
            }

            return result;
        } 
    }
    
}