C#邮件发送批量发送邮件发送邮件嵌入图片添加附件

清疚 2022-09-19 00:25 233阅读 0赞

# 一、邮件发送    #

public void Send()
 {
 	 MailMessage mail = new MailMessage();
 	 try
 {
 	 //设置邮件的标题
 	 mail.Subject ="悠哉WebService报告";
 	 mail.SubjectEncoding = System.Text.Encoding.UTF8;
 	 //设置邮件的发件人
 	 string SendEmail = ConfigurationManager.AppSettings["SendEmail"].ToString();
 	 MailAddress Addressfrom = new MailAddress(SendEmail, "uzai", System.Text.Encoding.UTF8); //邮件的发件人
 	 mail.From = Addressfrom;
 	 /* 这里这样写是因为可能发给多个联系人，每个地址用 , 号隔开
 */
 List<string> mailAddress = new List<string>();
 foreach (string address in mailAddress)
 {
 if (address != string.Empty)
 {
 mail.To.Add(new MailAddress(address, address, System.Text.Encoding.UTF8));
 }
 }
 //设置邮件的内容
 mail.Body = mailContent;
 //设置邮件的格式
 mail.BodyEncoding = System.Text.Encoding.UTF8;
 //mail.IsBodyHtml = true;
 //设置邮件的发送级别
 mail.Priority = MailPriority.Normal;
 //发送通知
 mail.DeliveryNotificationOptions = DeliveryNotificationOptions.OnSuccess;
 SmtpClient client = new SmtpClient();
 //设置用于 SMTP 事务的主机的名称，填IP地址也可以了
 client.Host = "smtp.gmail.com";
 client.Port = 25;
 client.Timeout = 9999;
 client.UseDefaultCredentials = true;
 client.EnableSsl = true;
 //邮箱登陆名和密码
 string EmailLogName = ConfigurationManager.AppSettings["EmailLogName"].ToString();
 string EmailLogPwd = ConfigurationManager.AppSettings["EmailLogPwd"].ToString();
 client.Credentials = new System.Net.NetworkCredential(EmailLogName, EmailLogPwd);
 client.DeliveryMethod = SmtpDeliveryMethod.Network;
 //发送email
 client.Send(mail);
 }
 catch (Exception)
 {
 	 //当邮件发送失败，发送异常时 使用备用方法调用备用邮箱发送
 SendBackUp();
 }
 finally
 {
 mail.Dispose();
 }
 }
 public void SendBackUp()
 {
 	 MailMessage mail = new MailMessage();
 	 try
 {
 	 //设置邮件的标题
 	 mail.Subject ="悠哉WebService报告";
 	 mail.SubjectEncoding = System.Text.Encoding.UTF8;
 	 //设置邮件的发件人
 	 string SendEmail = ConfigurationManager.AppSettings["SendEmail"].ToString();
 	 MailAddress Addressfrom = new MailAddress(SendEmail, "uzai", System.Text.Encoding.UTF8); //邮件的发件人
 	 mail.From = Addressfrom;
 	 /* 这里这样写是因为可能发给多个联系人，每个地址用 , 号隔开
 */
 List<string> mailAddress = new List<string>();
 foreach (string address in mailAddress)
 {
 if (address != string.Empty)
 {
 mail.To.Add(new MailAddress(address, address, System.Text.Encoding.UTF8));
 }
 }
 //设置邮件的内容
 mail.Body = mailContent;
 //设置邮件的格式
 mail.BodyEncoding = System.Text.Encoding.UTF8;
 //mail.IsBodyHtml = true;
 //设置邮件的发送级别
 mail.Priority = MailPriority.Normal;
 //发送通知
 mail.DeliveryNotificationOptions = DeliveryNotificationOptions.OnSuccess;
 SmtpClient client = new SmtpClient();
 //设置用于 SMTP 事务的主机的名称，填IP地址也可以了
 client.Host = "smtp.gmail.com";
 client.Port = 25;
 client.Timeout = 9999;
 client.UseDefaultCredentials = true;
 client.EnableSsl = true;
 //邮箱登陆名和密码
 string EmailLogName = ConfigurationManager.AppSettings["EmailLogName"].ToString();
 string EmailLogPwd = ConfigurationManager.AppSettings["EmailLogPwd"].ToString();
 client.Credentials = new System.Net.NetworkCredential(EmailLogName, EmailLogPwd);
 client.DeliveryMethod = SmtpDeliveryMethod.Network;
 //发送email
 client.Send(mail);
 }
 catch (Exception)
 {
 	 //当邮件发送失败，发送异常时 使用备用方法调用备用邮箱发送
 Send();
 }
 finally
 {
 mail.Dispose();
 }
 }

# 二、发送邮件图片,附件 #

###      我们在发送邮件时，一般图片都是用网络路径，但有时如果接收方不可直接访问外网，就不能看到图片了，比如公司内部邮件，跟外界就没法交流图片。 ###

###      那么我们就来把图片嵌入邮件中；查看人就没有限制了。 ###

##      ①、以linked的方式，此方式在邮件中不会出现图片的附件 ##

###      邮件内容调用图片格式为：<img src=\\"cid:Email001\\">      发送邮件的服务端代码为： ###

System.Net.Mail.MailMessage mailMessage = new System.Net.Mail.MailMessage(); 
 mailMessage.From="发送者邮箱"; 
 mailMessage.To.Add("收件人邮件列表"); 
 mailMessage.CC.Add("抄送人邮件列表"); 
 mailMessage.Subject = subject; 
 AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(content,null,"text/html"); 
 LinkedResource lrImage = new LinkedResource("a.jpg","image/gif"); 
 lrImage.ContentId = "Email001"; 
 htmlBody.LinkedResources.Add(lrImage); 
 mailMessage.AlternateViews.Add(htmlBody); 
 SmtpClient.Send(mailMessage); 
 
 SmtpClient smtp = new SmtpClient(); 
 smtp.DeliveryMethod = SmtpDeliveryMethod.Network; 
 smtp.Host = "smtp.163.com"; 
 smtp.Credentials = new NetworkCredential("renzhijie1111", "**"); 
 
 MailMessage mm = new MailMessage(); 
 mm.From = new MailAddress("test@163.com", "test"); 
 mm.To.Add("test2@163.com"); 
 
 mm.Subject = "测试图片邮件"; 
 
 string plainTextBody = "如果你邮件客户端不支持HTML格式，或者你切换到“普通文本”视图，将看到此内容"; 
 mm.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(plainTextBody, null, "text/plain")); 
 
 HTML格式邮件的内容 
 string htmlBodyContent = "如果你的看到这个， 说明你是在以 HTML 格式查看邮件 "; 
 htmlBodyContent += "<a href=\"http://www.fenbi360.net粉笔编程网</a> <img src=\"cid:weblogo\">"; //注意此处嵌入的图片资源 
 AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(htmlBodyContent, null, "text/html"); 
 
 
 LinkedResource lrImage = new LinkedResource(@"d:\1.jpg", "image/gif"); 
 lrImage.ContentId = "weblogo"; //此处的ContentId 对应 htmlBodyContent 内容中的 cid: ，如果设置不正确，请不会显示图片 
 htmlBody.LinkedResources.Add(lrImage); 
 
 mm.AlternateViews.Add(htmlBody); 
 
 要求回执的标志 
 mm.Headers.Add("Disposition-Notification-To", "test@163.com"); 
 
 自定义邮件头 
 mm.Headers.Add("X-Website", "http://www.fenbi360.net"); 
 
 针对 LOTUS DOMINO SERVER，插入回执头 
 mm.Headers.Add("ReturnReceipt", "1"); 
 
 mm.Priority = MailPriority.Normal; //优先级 
 mm.ReplyTo = new MailAddress("test2@163.com", "我自己"); 
 
 如果发送失败，SMTP 服务器将发送 失败邮件告诉我 
 mm.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure; 
 
 异步发送完成时的处理事件 
 smtp.SendCompleted += new SendCompletedEventHandler(smtp_SendCompleted); 
 
 开始异步发送 
 smtp.SendAsync(mm, null); 
 
 
 
 
 
 void smtp_SendCompleted(object sender, AsyncCompletedEventArgs e) 
 { 
 if (e.Cancelled) 
 { 
 MessageBox.Show("发送被取消"); 
 } 
 else 
 { 
 if (e.Error == null) 
 { 
 MessageBox.Show("发送成功"); 
 } 
 else 
 { 
 MessageBox.Show("发送失败： " + e.Error.Message); 
 } 
 } 
 }

## ②、以邮件附件的方式，此方式图片当附件发送，并会显示在邮件内容中。 ##

string htmlBodyContent = "如果你的看到这个， 说明你是在以 HTML 格式查看邮件 "; 
 htmlBodyContent += "<a href=\"testimg\"></a> <img src=\"cid:webimg\">"; //注意此处嵌入的图片资源 
 
 System.Net.Mail.Attachment att = new Attachment(@"E:\ttt.gif"); 
 att.ContentId = "webimg";