在使用smtp端口时出现异常时使用的Catch块，但它会抛出异常，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localserver中执行时显示错误消息，不应该出现在代码中。每当throw exception关闭或server或更改invalid email Id时，它应smtp port，结论是错误消息不应该直接来到代码。它应该显示错误消息并停止不应application的{{1}}。
hang这也引发了另一个问题，即每当它进入 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);
}
循环执行时
for功能即使在send(tomail)行中也是无效的，也会在每个实例中执行。我只有在ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script language='javascript'>alert('Email sent on " + test + "')</script>");和valid EmailID可用时才需要执行此功能。
答案 0 :(得分：2)
尝试使用这些代码行
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);
}
答案 1 :(得分：0)
它需要的时间是它需要“理解”某些东西不行的时间（当然，smtp失败的原因可能不同）。
在具体的代码中，我看到你重新 - 引发异常，这是根据你的要求不是你想要的，所以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，您可以使用您想要的任何内容。有不同的库：
依旧......
如果这不是您所要求的，请澄清。