c# – 使用Asp.Net发送SendAsync电子邮件,但Page仍在等待？

Main: Call send email function...
mailSend: Configuring....
mailSend: setting up incorrect port....
mailSend: Attempt now to send....
mailSend: End of Line
Main: Email Function call finish.
Main: Proccess Complete!
mailComp: Sending of mail failed,will try again in 5 seconds...
mailComp: Retrying...
mailComp: Send successful!
mailComp: End of Line

现在,我放置了错误的端口设置,因此第一封电子邮件失败,并测试第二次是否成功.即使使用正确的端口,页面仍然等待.只有在mailComp函数完成后才会最终发布Page.这是SendAsyn的一些限制吗？

这里有一些代码,不确定这是否有用.

    protected void btnReset_Click(object sender,EventArgs e)
    {
        try
        {
            DataContext db = new DataContext();

            var query = from u in db.Fish
                        where u.Username == txtUsername.Text & u.Email == txtEmail.Text
                        select new { u.Username,u.Email };

            if (query.Count() != 0)
            {


                User user = new User();
                String token = user.requestPasswordReset(txtUsername.Text);
                String URL = Request.Url.AbsoluteUri.ToString() + "?token=" + token;
                String body = "Reseting you password if you n" + URL + "n n ";


                Untilty.SendEmail(txtEmail.Text,"Reseting Password",body);

                litTitle.Text = "Message was sent!";
                litInfo.Text = "Please check your email in a few minuets for further instruction.";
                viewMode(false,false);
            }
            else
            {
                litCannotFindUserWithEmail.Visible = true;
            }


        }
        catch (Exception ex)
        {
            Debug.Write("Main: Exception: " + ex.ToString());
            litInfo.Text = "We are currently having some technically difficulty. Please try  again in a few minuets. If you are still having issue call us at 905344525";
        }
    }



///
public static class Utility

///

    public static void SendEmail(string recipient,string subject,string body)
    {
        MailMessage message = new MailMessage();

        message.To.Add(new MailAddress(recipient));
        message.From = new MailAddress(fromaddress,"Basadur Profile Website");
        message.Subject = subject;
        message.Body = body;

        Send(message);
    }

    private static void Send(MailMessage msg)
    {
        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.Credentials = new System.Net.NetworkCredential(fromaddress,mailpassword);
        smtp.EnableSsl = true;
        Debug.WriteLine("mailSend: setting up incorrect port....");
        smtp.Port = 5872; //incorrect port
        smtp.SendCompleted += new SendCompletedEventHandler(smtp_SendCompleted);

        smtp.SendAsync(msg,msg);

    }

    static void smtp_SendCompleted(object sender,System.ComponentModel.AsyncCompletedEventArgs e)
    {
        var msg = (MailMessage)e.UserState;

        if (e.Error != null)
        {
            System.Threading.Thread.Sleep(1000 * 5);

            try
            {
                SmtpClient smtp = new SmtpClient();
                smtp.Host = "smtp.gmail.com";
                smtp.Credentials = new System.Net.NetworkCredential(fromaddress,mailpassword);
                smtp.EnableSsl = true;
                smtp.Port = 587;
                smtp.Send(msg); 
            }
            catch (Exception ex)
            {
                Debug.WriteLine("mailComp: Failed for the second time giving up.");
            }
        }

    }