C#.NET发送邮件的实例代码

using System;

using System.Collections.Generic;

using System.Text;

using System.Net.Mail;

using System.Net;

namespace MyQuery.Utils

{

    /// <summary>

    /// 封装邮件处理

    /// by 贾世义 2011-6-3

    /// </summary>

    public static class MailHelper

    {

        private static string smtpHost = null;

        private static int smptPort = 25;

        private static bool smtpIsUserCredentials = false;

        private static string smtpCredentialAccount = null;

        private static string smtpCredentialPassword = null;

        /// <summary>

        /// 设置发送邮件参数

        /// </summary>

        /// <param name="host">smtp服务器地址或名称</param>

        /// <param name="port">smtp服务端口 一般为25</param>

        /// <param name="isUserCredentials">是否需要认证</param>

        /// <param name="account">需要认证时的用户</param>

        /// <param name="password">需要认证时的用户的密码</param>

        public static void SetParameters(string host, int port, bool isUserCredentials, string account, string password)

        {

            smtpHost = host;

            smptPort = port;

            smtpIsUserCredentials = isUserCredentials;

            smtpCredentialAccount = account;

            smtpCredentialPassword = password;

        }

        /// <summary>

        /// 设置发送邮件参数 取配置

        /// </summary>

        private static void setParameters()

        {

            if (String.IsNullOrEmpty(smtpHost))

            {

                smtpHost = WebHelper.GetAppConfig("SmtpHost");

                smptPort = DataHelper.GetIntValue(WebHelper.GetAppConfig("SmptPort"), 25);

                smtpIsUserCredentials = Constants.TRUE_ID.Equals(WebHelper.GetAppConfig("SmtpIsUserCredentials"));

                smtpCredentialAccount = WebHelper.GetAppConfig("SmtpCredentialAccount");

                smtpCredentialPassword = WebHelper.GetAppConfig("SmtpCredentialPassword");

            }

        }

        /// <summary>

        /// 发送邮件 发送邮件错误不会抛出异常

        /// </summary>

        /// <param name="receivers">收件人</param>

        /// <param name="title">标题/主题</param>

        /// <param name="content">信件内容</param>

        /// <param name="sender">发件人 空则取系统配置</param>

        public static void SendMail(string receivers, string title, string content, string sender)

        {

            if (!String.IsNullOrEmpty(receivers))

            {

                //初始化参数

                setParameters();

                if (!String.IsNullOrEmpty(smtpHost))

                {

                    try

                    {

                        SmtpClient smtp = new SmtpClient(smtpHost, smptPort);

                        if (smtpIsUserCredentials)

                        {

                            smtp.UseDefaultCredentials = true;

                            smtp.Credentials = new NetworkCredential(smtpCredentialAccount, smtpCredentialPassword); ;

                        }

                        smtp.DeliveryMethod = SmtpDeliveryMethod.Network;

                        if (String.IsNullOrEmpty(sender))

                        {

                            sender = smtpCredentialAccount;

                        }

                        foreach (string receiver in DataHelper.GetStrings(receivers))

                        {

                            MailMessage msg = new MailMessage(sender, receiver, title, content);

                            msg.BodyEncoding = Encoding.UTF8;

                            msg.SubjectEncoding = Encoding.UTF8;

                            msg.IsBodyHtml = true;

                            smtp.Send(msg);

                            msg.Dispose();

                        }

                    }

                    catch { }

                }

            }

        }

    }

}