具有Button_Click事件的C＃电子邮件

Question

I'm trying to create a Button_Click event that sends an email to a gmail account. This is the error I'm getting:

Unable to read data from the transport connection: net_io_connectionclosed.

It's pointing out Line 63 which is:

client.Send(mail);

Here is the code:

protected void Button2_Click(object sender, EventArgs e)
{
    System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage();
    SmtpClient client = new SmtpClient();
    client.Port = 465;
    client.DeliveryMethod = SmtpDeliveryMethod.Network;
    client.UseDefaultCredentials = false;
    client.Host = "smtp.gmail.com";
    mail.IsBodyHtml = true;
    mail.To.Add(new MailAddress("yourclassroomconnection@gmail.com"));
    mail.From = new MailAddress("yourclassroomconnection@gmail.com");
    mail.Subject = "New Order";
    string bodyTemplate = Label2.Text;
    mail.Body = bodyTemplate;
    client.Send(mail);
}

Any idea where I'm going wrong?

Answer 1

You can use below code as a small test. Try sending email with minimal option. Then add other options like html support. So you can narrow down the problem when you're experimenting a new thing.

       try {
        MailMessage mail = new MailMessage();
            SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");

            mail.From = new MailAddress("your_email_address@gmail.com");
            mail.To.Add("to_address");
            mail.Subject = "Test Mail";
            mail.Body = "This is for testing SMTP mail from GMAIL";

            SmtpServer.Port = 587;
            SmtpServer.Credentials = new System.Net.NetworkCredential("username", "password");
            SmtpServer.EnableSsl = true;

            SmtpServer.Send(mail);

        } catch (Exception ex)
        {

        }

You need to generate app specific password and use it here instead of your gmail password.

Please read this tutorial also. http://csharp.net-informations.com/communications/csharp-smtp-mail.htm