邮件带图片附件

var m = new MailMessage();

m.From = new MailAddress("xx");

m.To.Add(new MailAddress("xx"));

m.Attachments.Add(new Attachment(@"E:\Downloads\2.jpg"));

m.Attachments[0].ContentId = "MyPic";

m.Attachments[0].ContentDisposition.Inline = true;

m.Attachments[0].NameEncoding = m.SubjectEncoding = m.BodyEncoding = Encoding.UTF8;

//添加多个附件

　　　　 m.Attachments.Add(new Attachment(@"E:\Downloads\dd.xls"));

m.Attachments[0].ContentId = "MyPics";

m.Attachments[0].ContentDisposition.Inline = true;

m.Attachments[0].NameEncoding = m.SubjectEncoding = m.BodyEncoding = Encoding.UTF8;

m.Subject = "测试";

m.IsBodyHtml = true;

m.Body = string.Format(@"<img src=""{0}""/><a href=""{0}"" target=""_blank"">点击新窗口</a>", "cid:" + m.Attachments[0].ContentId);

var s = new SmtpClient();

s.EnableSsl = true;

s.Port = 587;

s.Host = "smtp.gmail.com";

s.UseDefaultCredentials = false;

s.Credentials = new System.Net.NetworkCredential("xx", "xx");

s.Send(m);