不能发送电子邮件（smtp）

问题描述：

我正在做我的功课，我点击一个按钮“验证我”后，必须发送电子邮件验证。不能发送电子邮件（smtp）

下面是按钮和文本框：

因此，流程是，你必须输入你的studentID，然后系统会检查该数据库是你的ID存在与否。如果你的studentID存在，我们会发送确认信息（随机密码访问网络）。

但是在这里，我很难发送电子邮件，说实话，我不知道什么是错的。

这里是我的部分代码（仅发送邮件代码）：

public void sendingverification() 
    { 
     //get EMAIL from spesific ID 
     string getEmail = "SELECT Email FROM TableStudent where StudentID = '" + IdTxt.Text + "'"; 
     SqlCommand sqlcomEmail = new SqlCommand(getEmail, con); 

     //get STUDENT FIRST NAME from spesific ID 
     string getName = "SELECT StudentFName FROM TableStudent where StudentID = '" + IdTxt.Text + "'"; 
     SqlCommand sqlcomName = new SqlCommand(getName, con); 

     string randomPw = System.Web.Security.Membership.GeneratePassword(10, 5); 
     string activationUrl = "http://aws.prominensa.com/izari/web-alumni/login.html"; 
     var fromAddress = new MailAddress("[email protected]", "S2 Alumnae Team"); 
     var toAddress = new MailAddress(sqlcomEmail.ToString(), sqlcomName.ToString()); 
     const string fromPassword = "123456"; 
     const string subject = "Activation Link for S2 Alumnae"; 
     string body = "Hello " + sqlcomName.ToString() + ", "; 
     body += "<br /><br />your account is almost done. You can login with your account now with this link below."; 
     body += "<br /><" + activationUrl; 
     body += "<br />< Please note that you will be able to login using: "; 
     body += "<br />< StudentID = " + IdTxt.Text; 
     body += "<br />< Password = " + randomPw; 
     body += "<br />< Thank you."; 

     var smtp = new SmtpClient 
     { 
      Host = "smtp.gmail.com", 
      Port = 587, 
      EnableSsl = true, 
      DeliveryMethod = SmtpDeliveryMethod.Network, 
      Credentials = new NetworkCredential(fromAddress.Address, fromPassword), 
      Timeout = 20000 
     }; 

     using (var message = new MailMessage(fromAddress, toAddress) 
     { 
      Subject = subject, 
      Body = body 
     }) 
     { 
      smtp.Send(message); 
     } 
    }

请问1）编辑你的代码并写出正确的C＃代码？ 2）你的'''message'''对象似乎在你调用* Send *之前就被处理了，3）你得到了什么错误？ – Ruskin

你遇到的异常或错误是什么？ –

答

是您从您的Gmail发送电子邮件，还有一些小设置，需要做的事情。（我不记得那个确切的设置，如果你不这样做，你会得到一个错误，只是谷歌，你会发现那是什么）。

我看到你使用String来建立你的消息，不要这样做，而是使用StringBuilder。

查看此片段。

  MailMessage mailObj = new MailMessage(); 
      //verification mail 
      mailObj.Subject = "Your Email Subject line"; 

      mailObj.Body = ComposeVerficationMailBody(emailDetails.MailMessage, emailDetails.RecipientName); 
      emailDetails.SenderName = "Your Website Name"; 


      mailObj.IsBodyHtml = true; 
      mailObj.Priority = System.Net.Mail.MailPriority.High; 

      //TO 
      mailObj.To.Add(emailDetails.RecipientEmailAddress); 
      mailObj.BodyEncoding = Encoding.Default; 
      mailObj.ReplyToList.Add(emailDetails.ReplyToEmailAddress); 
      //From 
      mailObj.From = new MailAddress(senderEmailAddress, senderDisplayName); 
      using (SmtpClient mailClient = new SmtpClient()) 
      { 
       mailClient.Host = "gmail host"; 
       mailClient.Port = 587; 
       mailClient.EnableSsl = false; 
       mailClient.UseDefaultCredentials = true; 
       mailClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network; 
       //mailClient.Credentials = new NetworkCredential("senderEmail", "senderPassword"); 


       MailAddress msg = new MailAddress(emailDetails.ReplyToEmailAddress); 
       mailClient.Timeout = 500000; 
       mailClient.Send(mailObj); 



private String ComposeVerficationMailBody() 
{ 
    StringBuilder emailMessage = new StringBuilder(); 
    //build your message here 
    return emailMessage.toString(); 
}

希望它足够您的要求。

不能发送电子邮件（smtp）

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