我在發送電子郵件時出現進度條錯誤

Question

我想在發送自動生成的電子郵件時有一個進度條，但出現錯誤。請幫我解決這個問題。任何類型的反應都非常感謝。

我不知道我是否在正確的道路上，我是C＃的初學者，只是依靠在線指南。

此行有錯誤

new System.Threading.Thread(new System.Threading.ThreadStart(btnSend_Click));

private void btnSend_Click(object sender, EventArgs e) 
    { 
     //Cursor.Current = Cursors.WaitCursor; 

     try 
     { 
      MailMessage loginInfo = new MailMessage(); 
      string em = "angelicasarimo15@gmail.com"; 
      loginInfo.To.Add(em.ToString()); 
      loginInfo.From = new MailAddress("vicserna1997@gmail.com"); 
      loginInfo.Subject = "Requesting Supplies"; 

      loginInfo.Body = "We want another supplies for blah blah blah" + System.Environment.NewLine + 
      "This is a system generated email."; 
      loginInfo.IsBodyHtml = true; 
      SmtpClient smtp = new SmtpClient(); 
      smtp.Host = "smtp.gmail.com"; 
      smtp.Port = 587; 
      smtp.EnableSsl = true; 
      smtp.Credentials = new System.Net.NetworkCredential("vicserna1997@gmail.com", "*Pass*"); 
      smtp.Send(loginInfo); 
      MessageBox.Show("Email has been sent!", "Sent", MessageBoxButtons.OK); 

      progressBar1.Visible = true; 
      progressBar1.Style = ProgressBarStyle.Marquee; 
      System.Threading.Thread thread = 
       new System.Threading.Thread(new System.Threading.ThreadStart(btnSend_Click)); 
      thread.Start(); 
     } 
     catch 
     { 
      MessageBox.Show("Message not sent please check you internet connection", "Not Sent", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning); 

     } 
    } 

Answer 1

使用SendAsync和訂閱SendCompleted。這會通知您發送過程已完成。我不相信它有可能獲得發送電子郵件的進度。