发送Email

//Send Email
private void emailSend(string code)
{

　　//验证发生的邮件地址不能为空；
　　if (String.IsNullOrWhiteSpace(this.txtUserMail.Text))
　　{
　　　　showErr("邮件地址");
　　　　return;
　　}
　　MailMessage mailMessage = new MailMessage();
　　mailMessage.To.Add(this.txtUserMail.Text);//收件人邮箱
　　mailMessage.From = new MailAddress("wefwerf@qq.com", "Test", System.Text.Encoding.UTF8);

　　mailMessage.Subject = "this is a Test.";
　　mailMessage.SubjectEncoding = System.Text.Encoding.UTF8;

　　mailMessage.Body = "你申请的验证码是：" + code ;
　　mailMessage.BodyEncoding = System.Text.Encoding.UTF8;

　　mailMessage.IsBodyHtml = false;
　　mailMessage.Priority = MailPriority.High;

　　SmtpClient smtpClient = new SmtpClient();
　　smtpClient.Credentials = new System.Net.NetworkCredential("ergferge@qq.com", "ergerg");
　　smtpClient.Host = "smtp.exmail.qq.com";
　　object userState = mailMessage;
　　try
　　{
　　　　smtpClient.SendAsync(mailMessage, userState);
　　　　showErr("验证码已经发送到你的邮箱中，", "请注意查收！");
　　}
　　catch (SmtpException ex)
　　{
　　　　showErr("发生失败！原因：", ex.ToString());
　　}
}