邮件群发工具（C#版）

Posted 2020-07-29

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引言

经常会参与组织一些社区活动，涉及到和不同的人进行交流，微信当然是必须的，同样邮件也是一种不可或缺的方式。

一般群发的邮件不是很友好，如果是一对一的，收到邮件的人是不是会比较重视，而且还有他的名字在里面。

所以抽点时间写了一个工具，使用C#做个发邮件的工具非常简单。

完整代码

class Program
    {
        private static string baseDir = "";
        private static string email = "";

        static void Main(string[] args)
        {
            Console.WriteLine("--- 开始执行 --- ");
            baseDir = AppDomain.CurrentDomain.SetupInformation.ApplicationBase;
            email = ConfigurationManager.AppSettings["email"];

            var date = DateTime.Now.ToString("yyyy-MM-dd");
            FileStream fs = new FileStream($"{baseDir}\\\\[Log]{date}.txt", FileMode.Create);
            StreamWriter sw = new StreamWriter(fs);
            sw.WriteLine("===== 发送日志 =====");

            List<Contact> contacts = GetContacts();
            var smtpClient = GetSmtpClient();
            foreach (var contact in contacts)
            {
                SendMail(smtpClient, contact, sw);
            }
            
            sw.WriteLine("===== 执行完成 =====");
            sw.Flush();
            sw.Close();
            fs.Close();
            Console.WriteLine("--- 执行完成 --- ");
            Console.ReadLine();
        }

        private static SmtpClient GetSmtpClient()
        {
            string server = ConfigurationManager.AppSettings["server"];
            string port = ConfigurationManager.AppSettings["port"];
            string password = ConfigurationManager.AppSettings["password"];

            SmtpClient smtpClient = new SmtpClient();
            smtpClient.Host = server;
            smtpClient.Port = Convert.ToInt32(port);
            smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
            smtpClient.EnableSsl = true;
            smtpClient.Credentials = new NetworkCredential(email, password);
            return smtpClient;
        }

        private static void SendMail(SmtpClient smtpClient, Contact contact, StreamWriter sw)
        {
            try
            {
                var mailMessage = GetMailMessage(contact);
                smtpClient.Send(mailMessage);
                Console.WriteLine($" --- 发送成功, Email = {contact.Email} --- ");
                sw.WriteLine($" --- 发送成功, Email = {contact.Email} --- ");
            }
            catch (Exception ex)
            {
                Console.WriteLine($" === 发送失败, Email = {contact.Email} === ");
                sw.WriteLine($" === 发送失败, Email = {contact.Email} === ");
            }
        }

        private static MailMessage GetMailMessage(Contact contact)
        {
            string subject = ConfigurationManager.AppSettings["subject"];
            string introduce = ConfigurationManager.AppSettings["introduce"];
            string link = ConfigurationManager.AppSettings["link"];
            string content = "<p style=\\"font - size:16px\\">Dear " + contact.Name + " , </p> " +
                                 "<p style=\\"font - size:16px\\">" + introduce + "</p>"+
                                 "<p style=\\"font - size:16px\\">报名链接："
　　　　　　　　　　　　　　　　　　　    +"<a target=\\"_blank\\" href=\\"" + link + "\\">"+ link + "</a></p>"
                                 + GetContent();
            MailMessage mailMessage = new MailMessage(email, contact.Email);
            mailMessage.Subject = subject;
            mailMessage.Body = content;
            mailMessage.BodyEncoding = Encoding.UTF8;
            mailMessage.IsBodyhtml = true;
            mailMessage.Priority = MailPriority.Normal;
            return mailMessage;
        }

        private static string GetContent()
        {
            var dir = baseDir + "\\\\content.txt";
            StreamReader sr = new StreamReader(dir, Encoding.UTF8);
            string content = sr.ReadToEnd();
            sr.Close();
            return content;
        }

        private static List<Contact> GetContacts()
        {
            List<Contact> contacts = new List<Contact>();
            var dir = baseDir + "\\\\contacts.txt";
            StreamReader sr = new StreamReader(dir, Encoding.UTF8);
            string line;
            while ((line = sr.ReadLine()) != null)
            {
                line = line.Replace("，", ",");
                var contact = line.Split(new[] {","}, StringSplitOptions.RemoveEmptyEntries);
                if (contact.Length == 2 && !string.IsNullOrEmpty(contact[0]) && !string.IsNullOrEmpty(contact[1]))
                {
                    contacts.Add(new Contact() {Name = contact[0], Email = contact[1]});
                }
            }
            sr.Close();
            return contacts;
        }

        public class Contact
        {
            public string Name { get; set; }

            public string Email { get; set; }
        }
    }

app.config

  <appSettings>
    <add key="server" value="smtp.live.com" />
    <add key="port" value="25" />
    <add key="email" value="***@hotmail.com" />
    <add key="password" value="" />
    <add key="subject" value="敏捷个人北京2016年6月活动：玩转生涯狂想曲" />
    <add key="introduce" value="欢迎参加敏捷个人北京2016年6月活动：玩转生涯狂想曲活动!" />
    <add key="link" value="http://www.hdb.com/party/qz1eu?h_share_uid=f0bv" />
  </appSettings>