SMTP协议发送电子邮件 源代码
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namespace SMTPServer
{
public partial class sendMailTSMI : Form
{
public sendMailTSMI()
{
InitializeComponent();
}
private void sendMailTSMI_Load(object sender, EventArgs e) {
fromTxt.Text = SendMail.mailFrom;
prptComBox.SelectedIndex = 0;
rBtnHTML.Checked = true;
}
private void button1_Click(object sender, EventArgs e)//浏览按钮
{
OpenFileDialog oFileDialog = new OpenFileDialog();
if (oFileDialog.ShowDialog() == DialogResult.OK)
{
AttachTxt.Text = oFileDialog.FileName;
}
}
private void btnSend_Click(object sender, EventArgs e)//发送按钮
{
if (toTxt.Text.Trim() == "")
{
MessageBox.Show("收件人不能为空！");
return;
}
if (fromTxt.Text.Trim() == string.Empty)
{
MessageBox.Show("发件人不能为空！");
return;
}
string mailTo = toTxt.Text.Trim();
string mailCC = ccTxt.Text.Trim();
string mailSubject = subjectTxt.Text.Trim();
string mailFrom = fromTxt.Text.Trim();
string mailBody = bodytxt.Text.Trim();
//实例化MailAddress
MailAddress maddr = new MailAddress(mailFrom);//包含收件人地址的MailAddress
//初始化MailMessage
MailMessage mymail = new MailMessage();
mymail.To.Add(mailTo);//向收件人地址集合添加邮件地址
.Add(mailCC);//向抄送收件人地址集合添加邮件地址
mymail.From = mailFrom;//发件人地址
mymail.Subject = mailSubject;//邮件标题
mymail.SubjectEncoding = Encoding.UTF8;//获取或设置电子邮件的主题内容实用的编码
mymail.Body = mailBody;//邮件正文
mymail.BodyEncoding = Encoding.UTF8;//获取或设置邮件正文的编码
//设置优先级
switch (prptComBox.SelectedText.ToString())
{
case"高":
mymail.Priority = MailPriority.High;
break;
case"中":
mymail.Priority = MailPriority.Normal;
break;
case"低":
mymail.Priority = MailPriority.Low;
break;
default:
break;
}
//添加附件(Attachment 表示电子邮件的附件)
if (AttachTxt.Text != "")//有附件
{
Attachment item = new Attachment(AttachTxt.Text); mymail.Attachments.Add(item);
}
//以HTML格式还是纯文本发送
if (rBtnHTML.Checked == true)
{
//以HTML格式发送
mymail.IsBodyHtml = true;
}
else
{
//以纯文本格式发送
mymail.IsBodyHtml = false;
}
string mailPwd = SendMail.mailPwd;
SmtpClient smtp = new SmtpClient();//SmtpClient允许用户用来发送邮件的实例
smtp.Credentials = new
workCredential(mailFrom, mailPwd);//Credentials获取或设置用于发件人身份的凭据
smtp.Host = SendMail.mailServer;//设置SMTP邮件服务器
try
{
smtp.Send(mymail);
MessageBox.Show("发送成功！");