利用SmtpClient异步地发送邮件

代码如下:

 

public void SendAsyncMail()
{
    MailMessage mail = new MailMessage();

    mail.From = new MailAddress("Enter from mail address");
    mail.To.Add(new MailAddress("Enter to address #1"));
    mail.To.Add(new MailAddress("Enter to address #2"));
    mail.Subject = "Enter mail subject";
    mail.Body = "Enter mail body";

    SmtpClient smtpClient = new SmtpClient();
    Object state = mail;

    //event handler for asynchronous call
    smtpClient.SendCompleted += new SendCompletedEventHandler(smtpClient_SendCompleted);
    try
    {
        smtpClient.SendAsync(mail, state);
    }
    catch (Exception ex)
    {

    }
}
    
void smtpClient_SendCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
{

    MailMessage mail = e.UserState as MailMessage;

    if (!e.Cancelled && e.Error!=null)
    {
        message.Text = "Mail sent successfully";
    }
}