C#邮件发送 批量发送邮件 发送邮件嵌入图片 添加附件
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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<b>这个</b>， 说明你是在以 <span style=\"color:red\">HTML</span> 格式查看邮件<br><br>"; 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<b>这个</b>， 说明你是在以 <span style=\"color:red\">HTML</span> 格式查看邮件<br><br>"; 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";
