由于我们正在使用Amazon SES,因此我们必须重新设计如何发送电子邮件。过去,我们使用的是smtp,但在这种情况下不能这样做。需要更新的类已接收MailMessage对象,并使用smtp发送它。因此,我正在尝试对该方法进行修改,使其能够继续接受MailMessage对象并将其转换为MimeKit MimeMessage。在大多数情况下,它工作正常,除了附件方面。在我的代码中,附件被添加并发送,但是,当尝试打开它时,它似乎已损坏或发生了什么。在我的测试案例中,我附加了一个csv文件。收到电子邮件后,我无法在excel中打开它。
public class EmailAbstraction
{
public virtual void Send(MailMessage mailMessage)
{
sendMessage(mailMessage);
}
private static void sendMessage(MailMessage mailMessage)
{
using (var client = new AmazonSimpleEmailServiceClient(AwsConstants.SESAWSKey, AwsConstants.SESAWSSecret, AwsConstants.RegionEndpoint))
{
foreach (var to in mailMessage.To)
{
using (var messageStream = new MemoryStream())
{
var newMessage = new MimeMessage();
var builder = new BodyBuilder
{
HtmlBody = mailMessage.Body
};
newMessage.From.Add(mailMessage.From == null
? new MailboxAddress(EmailConstants.DefaultFromEmailDisplayName, EmailConstants.DefaultFromEmailAddress)
: new MailboxAddress(mailMessage.From.Address));
newMessage.To.Add(new MailboxAddress(to.DisplayName, to.Address));
newMessage.Subject = mailMessage.Subject;
foreach (var attachment in mailMessage.Attachments)
{
builder.Attachments.Add(attachment.Name, attachment.ContentStream);
}
newMessage.Body = builder.ToMessageBody();
newMessage.WriteTo(messageStream);
var request = new SendRawEmailRequest
{
RawMessage = new RawMessage { Data = messageStream }
};
client.SendRawEmail(request);
}
}
}
}
}
在我的测试应用中,我有这个。
internal class Program
{
private static void Main(string[] args)
{
var s = GetFileStream();
var m = new MailMessage();
var sender = new MailAddress("info@ourwebsite.com", "info");
m.From = sender;
m.Sender = sender;
m.Body = "test email";
m.Subject = "test subject";
m.To.Add(myemail);
m.Attachments.Add(new Attachment(s, "test-file.csv"));
new EmailAbstraction().Send(m);
}
private static MemoryStream GetFileStream()
{
var stream = new MemoryStream();
var fileStream = File.Open(@"C:\Users\dev\Desktop\test-file.csv", FileMode.Open);
fileStream.CopyTo(stream);
fileStream.Close();
return stream;
}
}
答案 0 :(得分:0)
这只是从MimeKit源代码复制而来:
static MimePart GetMimePart (System.Net.Mail.AttachmentBase item)
{
var mimeType = item.ContentType.ToString ();
var contentType = ContentType.Parse (mimeType);
var attachment = item as System.Net.Mail.Attachment;
MimePart part;
if (contentType.MediaType.Equals ("text", StringComparison.OrdinalIgnoreCase))
part = new TextPart (contentType);
else
part = new MimePart (contentType);
if (attachment != null) {
var disposition = attachment.ContentDisposition.ToString ();
part.ContentDisposition = ContentDisposition.Parse (disposition);
}
switch (item.TransferEncoding) {
case System.Net.Mime.TransferEncoding.QuotedPrintable:
part.ContentTransferEncoding = ContentEncoding.QuotedPrintable;
break;
case System.Net.Mime.TransferEncoding.Base64:
part.ContentTransferEncoding = ContentEncoding.Base64;
break;
case System.Net.Mime.TransferEncoding.SevenBit:
part.ContentTransferEncoding = ContentEncoding.SevenBit;
break;
//case System.Net.Mime.TransferEncoding.EightBit:
// part.ContentTransferEncoding = ContentEncoding.EightBit;
// break;
}
if (item.ContentId != null)
part.ContentId = item.ContentId;
var stream = new MemoryStream ();
item.ContentStream.CopyTo (stream);
stream.Position = 0;
part.Content = new MimeContent (stream);
return part;
}