C#发送邮件（代码）

C#发送邮件主要代码 

--------------------------

using System;
using System.Web;
using System.Net;
using System.Net.Mail;
using System.Xml;
using System.Configuration;
using System.IO;
using System.Text;
using System.Collections.Generic;

namespace TSF.Ent.Common.Utils
{
    /// <summary>
    /// 邮件发送工具
    /// </summary>
    public class MailUtil
    {
        private MailUtil() { }

        /// <summary>
        /// 发送邮件
        /// </summary>     
        /// <param name="receiver">邮件接受者</param>
        /// <param name="subject">邮件标题</param>
        /// <param name="body">邮件正文</param>
        /// <param name="attachments">附件</param>
        public static void Send(string receiver, string subject,
    string body, IList<Attachment> attachments)
        {
            Send(SmtpConfig.Provider.SmtpSetting.Sender, receiver, subject, body, attachments);
        }

        /// <summary>
        /// 发送邮件
        /// </summary>     
        /// <param name="sender">邮件发送者</param>
        /// <param name="receiver">邮件接受者</param>
        /// <param name="subject">邮件标题</param>
        /// <param name="body">邮件正文</param>
        /// <param name="attachments">附件</param>
        public static void Send(string sender, string receiver, string subject,
    string body, IList<Attachment> attachments)
        {
            Send(SmtpConfig.Provider.SmtpSetting.Host, SmtpConfig.Provider.SmtpSetting.Port, SmtpConfig.Provider.SmtpSetting.UserName, SmtpConfig.Provider.SmtpSetting.Password, sender, receiver, subject, body, attachments);
        }


        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="host">邮件服务器</param>
        /// <param name="port">端口</param>
        /// <param name="userName">邮件服务器登录用户</param>
        /// <param name="passwrod">邮件服务器登录密码</param>
        /// <param name="sender">邮件发送者</param>
        /// <param name="receiver">邮件接受者</param>
        /// <param name="subject">邮件标题</param>
        /// <param name="body">邮件正文</param>
        /// <param name="attachments">附件</param>
        public static void Send(string host, int port, string userName, string passwrod, string sender, string receiver, string subject,
    string body, IList<Attachment> attachments)
        {
            SmtpClient smtpClient = new SmtpClient(host, port);

            MailMessage msg = new MailMessage(sender, receiver);

            msg.IsBodyHtml = true;
            msg.SubjectEncoding = Encoding.GetEncoding("utf-8");
            msg.BodyEncoding = Encoding.GetEncoding("utf-8");

            msg.Subject = subject;
            msg.Body = body;

            msg.Attachments.Clear();
            if (attachments != null)
            {
                foreach (Attachment attach in attachments)
                {
                    // 增加附件
                    msg.Attachments.Add(attach);
                }
            }

            smtpClient.UseDefaultCredentials = false;
            smtpClient.Credentials = new NetworkCredential(userName, passwrod);
            smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;

            smtpClient.Send(msg);

        }
    }

    /// <summary>
    /// 配置邮件服务器
    /// </summary>
    internal class SmtpConfig
    {
        private static SmtpConfig _smtpConfig;
        private SmtpSetting _smtpSetting;

        private SmtpConfig() { }

        /// <summary>
        /// 获取邮件服务器配置
        /// </summary>
        public static SmtpConfig Provider
        {
            get
            {
                if (_smtpConfig == null)
                {
                    _smtpConfig = new SmtpConfig();
                }
                return _smtpConfig;
            }
        }

        /// <summary>
        /// 配置信息
        /// </summary>
        public SmtpSetting SmtpSetting
        {
            get
            {
                if (_smtpSetting == null)
                {
                    XmlDocument doc = new XmlDocument();
                    doc.Load(this.ConfigFile);

                    _smtpSetting = new SmtpSetting()
                    {
                        Host = doc.DocumentElement.SelectSingleNode("Host").InnerText,
                        Port = Convert.ToInt32(doc.DocumentElement.SelectSingleNode("Port").InnerText),
                        UserName = doc.DocumentElement.SelectSingleNode("UserName").InnerText,
                        Password = doc.DocumentElement.SelectSingleNode("Password").InnerText,
                        Sender = doc.DocumentElement.SelectSingleNode("Sender").InnerText
                    };
                }
                return _smtpSetting;
            }
        }

        /// <summary>
        /// 读取配置文件
        /// </summary>
        private string ConfigFile
        {
            get
            {
                string configPath = ConfigurationManager.AppSettings["SmtpConfig"];

                if (HttpContext.Current != null)
                {
                    configPath = HttpContext.Current.Server.MapPath(configPath);
                }
                else // 非Web
                {
                    configPath = configPath.Replace("/", "\\");
                    configPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, configPath);
                }
                return configPath;
            }
        }
    }

    internal class SmtpSetting
    {
        private string _host;
        private int _port = 25;
        private string _userName;
        private string _password;
        private string _sender;

        public string Host
        {
            get { return _host; }
            set { _host = value; }
        }

        public int Port
        {
            get { return _port; }
            set { _port = value; }
        }

        public string UserName
        {
            get { return _userName; }
            set { _userName = value; }
        }

        public string Password
        {
            get { return _password; }
            set { _password = value; }
        }

        public string Sender
        {
            get { return _sender; }
            set { _sender = value; }
        }
    }
}

 

 邮件配置

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<!-- 在Web.config或者App.config增加                                  -->
<!-- ------------------------------------------                   -->
<!-- <appSettings>                                                -->
<!--     <add key="SmtpConfig" value="Config/SmtpSetting.config"/> -->
<!-- </appSettings>                                               -->
<!-- ------------------------------------------                   -->

<!-- SmtpSetting.config                                           -->             
<!-- ------------------------------------------                   -->
<SmtpSetting>
    <Host>pop3.server.com</Host>
    <Port>25</Port>
    <UserName>yourcompany@site.com</UserName>
    <Password>yourpassword</Password>
    <Sender>yourcompany@site.com</Sender>
</SmtpSetting>

  

发送测试

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static void Main(string[] args)
{
IList<Attachment> attachs = new List<Attachment>();

Attachment attach = new Attachment(@"E:\docs\慢慢地才知道.txt");

attachs.Add(attach);

for (int i = 0; i < 10; i++)
{
// 测试
MailUtil.Send(" yourname@163.com , "测试邮件", "测试邮件正文", attachs);
}

System.Console.ReadKey();

}