邮件HTML

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);    

例程：

折叠C# 代码

1.             SmtpClient smtp = new SmtpClient();  
2.             smtp.DeliveryMethod = SmtpDeliveryMethod.Network;  
3.             smtp.Host ="smtp.163.com";  
4.             smtp.Credentials =new NetworkCredential("renzhijie1111","**");  
5.  
6.             MailMessage mm =new MailMessage();  
7.             mm.From =new MailAddress("[e-mail]","test");  
8.             mm.To.Add("[e-mail]");  
9.  
10.             mm.Subject ="测试图片邮件";  
11.  
12.            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";  
13.             mm.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(plainTextBody,null,"text/plain"));  
14.  
15.            ////HTML格式邮件的内容 
16.            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>";  
17.             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  
18.             AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(htmlBodyContent,null,"text/html");  
19.  
20.              
21.             LinkedResource lrImage =new LinkedResource(@"d:\1.jpg","image/gif");  
22.             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 
23.             htmlBody.LinkedResources.Add(lrImage);  
24.  
25.             mm.AlternateViews.Add(htmlBody);  
26.  
27.            ////要求回执的标志 
28.             mm.Headers.Add("Disposition-Notification-To","[e-mail]");  
29.  
30.            ////自定义邮件头 
31.             mm.Headers.Add("X-Website","http://www.fenbi360.net");  
32.  
33.            ////针对 LOTUS DOMINO SERVER，插入回执头 
34.             mm.Headers.Add("ReturnReceipt","1");  
35.  
36.             mm.Priority = MailPriority.Normal;//优先级 
37.             mm.ReplyTo =new MailAddress("[e-mail]","我自己");  
38.  
39.            ////如果发送失败，SMTP 服务器将发送 失败邮件告诉我 
40.             mm.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;  
41.  
42.            ////异步发送完成时的处理事件 
43.             smtp.SendCompleted +=new SendCompletedEventHandler(smtp_SendCompleted);  
44.  
45.            ////开始异步发送 
46.             smtp.SendAsync(mm,null);  
47.  
48.  
49.  
50.  
51.  
52. void smtp_SendCompleted(object sender, AsyncCompletedEventArgs e)  
53.         {  
54.            if (e.Cancelled)  
55.             {  
56.                 MessageBox.Show("发送被取消");  
57.             }  
58.            else 
59.             {  
60.                if (e.Error == null)  
61.                 {  
62.                     MessageBox.Show("发送成功");  
63.                 }  
64.                else 
65.                 {  
66.                     MessageBox.Show("发送失败： " + e.Error.Message);  
67.                 }  
68.             }  
69.         }