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使用端口时出现异常时使用catch块smtp，但它会抛出异常，这很好，it will take a very long time并且异常消息将直接显示在代码本身中，要求是在执行时显示错误消息localserver并且不应该出现在代码。它应该throw exception无论何时server关闭或invalid email Id更改smtp port，结论是错误消息不应该直接出现在代码中。它应该显示错误消息并停止不应该出现的错误application消息hang。 

 protected void Button2_Click(object sender, EventArgs e)
{

    //string vv;
    //vv = (string)Session["FID"];
    DateTime sdt = DateTime.Today;

    SqlCommand cmd4 = new SqlCommand();

    int flag=0;


   String test = DateTime.Now.ToString("dd.MM.yyy");
   for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
   {

       string toemail = GridView1.Rows[i].Cells[2].Text;
       string FID1 = GridView1.Rows[i].Cells[0].Text;
       GridViewRow row = GridView1.Rows[i];
       CheckBox Ckbox = (CheckBox)row.FindControl("CheckBoxMark1");
       if (Ckbox.Checked == true)
       {

           sendMail(toemail);
           flag = 1;
           //ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script language='javascript'>alert('Email send Succesfully')</script>");
       }

       if (flag == 1)
       {
           ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script language='javascript'>alert('Email sent  on " + test + "')</script>");

           cn.Open();
           //cmd4.CommandText = "Insert into TrackingFaculty_det  (EmailsentDate)  values (@EmailsentDate) WHERE FID=@FID";
           cmd4.CommandText = "update TrackingFaculty_det SET EmailsentDate=@Email WHERE FID=@FID  ";
           cmd4.CommandType = CommandType.Text;
           cmd4.Connection = cn;

           cmd4.Parameters.Clear();


           cmd4.Parameters.Add("@Email", SqlDbType.DateTime, 8);
           cmd4.Parameters["@Email"].Value = sdt;
           cmd4.Parameters.Add("@FID", SqlDbType.VarChar, 10);
           cmd4.Parameters["@FID"].Value = FID1;
           cmd4.ExecuteNonQuery();
           cn.Close();
           log.Debug("Info : Insert the Email Sent Date of the faculty");
       }
       else
       {
           ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script language='javascript'>alert('Email cannot be sent')</script>");
       }




   }
   log.Debug("Info : Function used to send mail");
}

public void sendMail(String toemail)
{


    try
    {


        MailMessage mail = new MailMessage();
        mail.To.Add(toemail);
        mail.From = new MailAddress("manipal.mcis1@gmail.com");
        mail.Subject = "Remember Mail";
        // string Body = "Please update profile";
        //mail.Body = Body;
        mail.Body = "  Dear Sir/Madam \n\n\n Please update your profile. . \n\n\n Thanks & Regards \n\n\n MCIS,Manipal.";
        //mail.Body = "<html><body> <h2" + "align=center>Dear Sir/Madam" + "</h2> Please update ur profile</body></html>";
        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.Port = 584;
        smtp.UseDefaultCredentials = false;
        smtp.Credentials = new System.Net.NetworkCredential("manipal.mcis1@gmail.com", "manipal15");
        smtp.EnableSsl = true;
        smtp.Send(mail);


    }
catch (SmtpException ex)
    {

   string msg = "Mail cannot be sent:";
        msg += ex.Message;
        log.Debug("Error: Inside catch block of Mail sending");
        log.Error("Error msg:" + ex);
        log.Error("Stack trace:" + ex.StackTrace);


        throw new Exception(msg);

    }

这也带来了另一个问题，即每当它进入for循环时，
send(tomail)即使它是无效的，它也会执行该函数，并且该行也会在每个实例中执行。我只需要在适当 的ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script language='javascript'>alert('Email sent on " + test + "')</script>");时候才能完成这项工作。valid EmailIDsmtp port

4

2 回答 2

2

试试这些代码行它会工作

protected void Button2_Click(object sender, EventArgs e)
{

    //string vv;
    //vv = (string)Session["FID"];
    DateTime sdt = DateTime.Today;

    SqlCommand cmd4 = new SqlCommand();

    int flag=0;


   String test = DateTime.Now.ToString("dd.MM.yyy");
   for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
   {

       string toemail = GridView1.Rows[i].Cells[2].Text;
       string FID1 = GridView1.Rows[i].Cells[0].Text;
       GridViewRow row = GridView1.Rows[i];
       CheckBox Ckbox = (CheckBox)row.FindControl("CheckBoxMark1");
       if (Ckbox.Checked == true)
       {

           sendMail(toemail);
           flag = 1;
           //ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script language='javascript'>alert('Email send Succesfully')</script>");
       }

       if (flag == 1)
       {
           //ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script language='javascript'>alert('Email sent  on " + test + "')</script>");

           cn.Open();
           //cmd4.CommandText = "Insert into TrackingFaculty_det  (EmailsentDate)  values (@EmailsentDate) WHERE FID=@FID";
           cmd4.CommandText = "update TrackingFaculty_det SET EmailsentDate=@Email WHERE FID=@FID  ";
           cmd4.CommandType = CommandType.Text;
           cmd4.Connection = cn;

           cmd4.Parameters.Clear();


           cmd4.Parameters.Add("@Email", SqlDbType.DateTime, 8);
           cmd4.Parameters["@Email"].Value = sdt;
           cmd4.Parameters.Add("@FID", SqlDbType.VarChar, 10);
           cmd4.Parameters["@FID"].Value = FID1;
           cmd4.ExecuteNonQuery();
           cn.Close();
           log.Debug("Info : Insert the Email Sent Date of the faculty");
       }




   }
   log.Debug("Info : Function used to send mail");
}

public void sendMail(String toemail)
{


    try
    {


        MailMessage mail = new MailMessage();
        mail.To.Add(toemail);
        mail.From = new MailAddress("manipal.mcis1@gmail.com");
        mail.Subject = "Remember Mail";
        // string Body = "Please update profile";
        //mail.Body = Body;
        mail.Body = "  Dear Sir/Madam \n\n\n Please update your profile. . \n\n\n Thanks & Regards \n\n\n MCIS,Manipal.";
        //mail.Body = "<html><body> <h2" + "align=center>Dear Sir/Madam" + "</h2> Please update ur profile</body></html>";
        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.Port = 587;
        smtp.UseDefaultCredentials = false;
        smtp.Credentials = new System.Net.NetworkCredential("manipal.mcis1@gmail.com", "manipal15");
        smtp.EnableSsl = true;
        smtp.Send(mail);


    }
    catch (SmtpException ex)
    {


        string msg = "Mail cannot be sent because of the server problem:";
        msg += ex.Message;
        log.Debug("Error: Inside catch block of Mail sending");
        log.Error("Error msg:" + ex);
        log.Error("Stack trace:" + ex.StackTrace);

        Response.Write(msg);
        //throw new Exception(msg);

    }
于 2013-10-22T10:37:25.293 回答
0

它需要的时间是它需要“理解”某事不正常的时间（这可能是 smtp 失败的不同原因，自然）。

在您的具体代码中，我看到您重新引发了一个异常，根据您的要求，这不是您想要的，因此可能更好的解决方案可能是：

    catch (SmtpException ex)
    {

       string msg = "Mail cannot be sent:";
         msg += ex.Message;
         log.Debug("Error: Inside catch block of Mail sending");
         log.Error("Error msg:" + ex);
         log.Error("Stack trace:" + ex.StackTrace);


         SendAsyncMessage(msg);//just an example

    }

对于客户端通知，您可以使用任何您想要的。为此有不同的库：

等等 ...

如果这不是您要的，请澄清。

于 2013-10-22T06:42:16.043 回答