我正在通过ASP.NETMVC使用服务组件. 我想以异步方式发送邮箱,让用户不必等待发送就可以做其他事情.
当我发送一条没有附件的消息时,它可以正常工作.
所以,我想知道是否可以使用带有内存附件的异步方法.
以下是发送方法
public static void Send() {
MailMessage message = new MailMessage("from@foo.com", "too@foo.com");
using (MemoryStream stream = new MemoryStream(new byte[64000])) {
Attachment attachment = new Attachment(stream, "my attachment");
message.Attachments.Add(attachment);
message.Body = "This is an async test.";
SmtpClient smtp = new SmtpClient("localhost");
smtp.Credentials = new NetworkCredential("foo", "bar");
smtp.SendAsync(message, null);
}
}
这是我目前的错误
System.Net.Mail.SmtpException: Failure sending mail.
---> System.NotSupportedException: Stream does not support reading.
at System.Net.Mime.MimeBasePart.EndSend(IAsyncResult asyncResult)
at System.Net.Mail.Message.EndSend(IAsyncResult asyncResult)
at System.Net.Mail.SmtpClient.SendMessageCallback(IAsyncResult result)
--- End of inner exception stack trace ---
解决方案
public static void Send()
{
MailMessage message = new MailMessage("from@foo.com", "to@foo.com");
MemoryStream stream = new MemoryStream(new byte[64000]);
Attachment attachment = new Attachment(stream, "my attachment");
message.Attachments.Add(attachment);
message.Body = "This is an async test.";
SmtpClient smtp = new SmtpClient("localhost");
//smtp.Credentials = new NetworkCredential("login", "password");
smtp.SendCompleted += delegate(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
{
if (e.Error != null)
{
System.Diagnostics.Trace.TraceError(e.Error.ToString());
}
MailMessage userMessage = e.UserState as MailMessage;
if (userMessage != null)
{
userMessage.Dispose();
}
};
smtp.SendAsync(message, message);
}