1         private void sendMailBtn_Click(object sender, EventArgs e)
  2         {
  3             pbSendEmail.Value = 0;
  4             pbSendEmail.Maximum = 100;
  5             try
  6             {
  7                 MailMessage mail = new MailMessage();
  8                 SmtpClient smtpServer = new SmtpClient("smtp.gmail.com");
  9                 
 10                 
 11                 //mail from
 12                 mail.From = new MailAddress("123@gmail.com");
 13 
 14                 //mail to
 15                 if (string.IsNullOrEmpty(tbMailTo.Text))
 16                 {
 17                     MessageBox.Show("The recipient of this mail can‘t be empty!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
 18                     sendMailBtn.Enabled = false;
 19                     return;
 20                 }
 21                 string mailAddress = tbMailTo.Text.TrimEnd();
 22                 string[] mailAddresses = mailAddress.Split(',');       
 23                 mailAddress = string.Empty;
 24                 ArrayList emailList = new ArrayList();
 25                 foreach(string address in mailAddresses)
 26                 {
 27                     string tempEmailAddress = address.Trim();
 28                     if (string.IsNullOrEmpty(tempEmailAddress))
 29                     {
 30                         continue;
 31                     }
 32                     if (!CheckEmail.IsEmail(tempEmailAddress))
 33                     {
 34                         MessageBox.Show("Invalid E-mail address: " + address + "\nIf there are multiple e-mail addresses, please seperate each of them by comma character.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
 35                         return;
 36                     }
 37 
 38                     emailList.Add(tempEmailAddress);
 39                 
 40                 }
 41                 foreach (string tempEmailAddress in emailList)
 42                 {
 43                     mail.To.Add(tempEmailAddress);
 44                     pbSendEmail.Value++;
 45                 }
 46 
 47                 //mail subject
 48                 mail.Subject = tbSubject.Text.ToString();
 49                 
 50                 //mail body
 51                 if (cbBodyFormat.SelectedText == "Text")
 52                 {
 53                     mail.IsBodyHtml = false;
 54                 }
 55                 else
 56                 {
 57                     mail.IsBodyHtml = true;
 58                 }
 59                 mail.BodyEncoding = Encoding.UTF8;
 60                 mail.Body = rtbMailBody.Text.ToString();
 61 
 62                 //mail attachment
 63                 if (!string.IsNullOrEmpty(tbAttachment.Text.ToString()))
 64                 {
 65 
 66                     System.Net.Mail.Attachment attachment = new Attachment(tbAttachment.Text);
 67                     mail.Attachments.Add(attachment);
 68                 }
 69 
 70                 //mail priority
 71                 if (cbMailPriority.SelectedText.ToString() == "High")
 72                 {
 73                     mail.Priority = MailPriority.High;
 74                 }
 75                 else if (cbMailPriority.SelectedText.ToString() == "Low")
 76                 {
 77                     mail.Priority = MailPriority.Low;
 78                 }
 79                 else
 80                 {
 81                     mail.Priority = MailPriority.Normal;
 82                 }                
 83 
 84                 smtpServer.Port = 587;
 85                 smtpServer.Credentials = new System.Net.NetworkCredential("123", "password");
 86                 smtpServer.EnableSsl = true;
 87 
 88                 smtpServer.Send(mail);
 89                 pbSendEmail.Value = 100;
 90                 MessageBox.Show("Your mail has been sent successfully, please check it!", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
 91                 
 92             }
 93             catch (Exception ex)
 94             {
 95                 MessageBox.Show("The following exception occurred: " + ex.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
 96             }
 97             finally
 98             {
 99 
100             }
101         }

优质内容筛选与推荐>>
1、linux下mysql提权
2、Python类
3、ChemDraw Pro和ChemBio3D Ultra有什么区别
4、怎么使用IDEA
5、［转］Ubuntu Linux 安装 .7z 解压和压缩文件