Question

System.Security.SecurityException: Request for the permission of type 'System.Net.Mail.SmtpPermission, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
at System.Security.CodeAccessSecurityEngine.Check(CodeAccessPermission cap, StackCrawlMark& stackMark)
at System.Security.CodeAccessPermission.Demand()
at System.Net.Mail.SmtpClient.set_Port(Int32 value)
at feedbackcontrol.SendEmail(String toAddress, String subject, String body) in d:\inetpub\vhosts\platinumrealtee.com\httpdocs\feedbackcontrol.ascx.cs:line 38

The action that failed was: Demand The type of the first permission that failed was: System.Net.Mail.SmtpPermission The Zone of the assembly that failed was: MyComputer

在代码隐藏文件中使用此代码。

protected void Button1_Click(object sender, EventArgs e)
{
      Label1.Text = SendEmail(txtTo.Text, txtsubject.Text, txtMsg.Text);
}

protected string SendEmail(string toAddress, string subject, string body)
    {
        string result = "Message Sent Successfully..!!";

        string senderID = "abc@gmail.com";// use sender’s email id here..
        const string senderPassword ="abcd"; // sender password here…

        try
        {
            SmtpClient smtp = new SmtpClient
            {
                Host = "smtp.gmail.com", // smtp server address here…
                Port = 590,
                EnableSsl = true,
                DeliveryMethod = SmtpDeliveryMethod.Network,
                Credentials = new System.Net.NetworkCredential(senderID, senderPassword),
                Timeout = 30000,

            };

            MailMessage message = new MailMessage(senderID, toAddress, subject, body);

            smtp.Send(message);
        }
        catch (Exception ex)
        {

            result = ex.ToString();
        }

        return result;
    }

Answer 1

根据你想要的，看看下面的

Send Mail functionality in asp.net

相关邮件代码： -

protected void btnSend_Click(object sender, EventArgs e)
    {
        MailMessage mm = new MailMessage("sender@gmail.com", "receiver@gmail.com");
        mm.Subject = txtSubject.Text;
        mm.Body = "Name: " + txtName.Text + "<br /><br />Email: " + txtEmail.Text + "<br />" + txtBody.Text;
        if (FileUpload1.HasFile)
        {
            string FileName = System.IO.Path.GetFileName(FileUpload1.PostedFile.FileName);
            mm.Attachments.Add(new Attachment(FileUpload1.PostedFile.InputStream, FileName));
        }
        mm.IsBodyHtml = true;
        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.EnableSsl = true;
        System.Net.NetworkCredential NetworkCred = new System.Net.NetworkCredential();
        NetworkCred.UserName = "sender@gmail.com";
        NetworkCred.Password = "xxxxx";
        smtp.UseDefaultCredentials = true;
        smtp.Credentials = NetworkCred;
        smtp.Port = 587;
        smtp.Send(mm);
        lblMessage.Text = "Email Sent SucessFully.";
    }

此外，您需要正确添加smtp port和其他相关信息才能按要求工作

<强>更新

由于它无法在服务器上运行，因此您需要在web.config文件中添加一个设置才能生效。

<configuration>
   <system.web>
       .....
    <trust level="Full" originUrl=""/>
   </system.web>
</configuration>

您需要设置trust level set to full

摘自here

Answer 2

这是另一个例子。请记住，如果smtp.port = 25，它会更好;

  try 
  { 
           MailMessage msg = new MailMessage ();
           MailAddress fromAdd = new MailAddress("fromemail@email.com");
           msg.[To].Add("toemail@email.com");
           msg.Subject = "Choose Session Members";
           msg.From = fromAdd;
           msg .IsBodyHtml = true;
           msg.Priority = MailPriority.Normal;
           msg .BodyEncoding = Encoding.Default;
           msg.Body = "<center><table><tr><td><h1>Your Message</h1><br/><br/></td></tr>";
           msg.Body = msg.Body + "</table></center>";
           SmtpClient smtpClient = new SmtpClient ("smtp.yourserver.com", "25");
           smtpClient.EnableSsl = true;
           smtpClient.UseDefaultCredentials = false;
           smtpClient.Credentials = new System.Net.NetworkCredential("yourname@yourserver.com", "password");
           smtpClient .DeliveryMethod = SmtpDeliveryMethod.Network;
           smtpClient.Send(msg);
           smtpClient.Dispose();
        }
    catch (exception ex){
        Label1.Text  = ex.ToString();
    }

从我的网站发送邮件在asp.net（C＃）

2 个答案: