如何忽略发送电子邮件的方法并继续执行

本文关键字：方法 继续 执行 电子邮件 何忽略 | 更新日期: 2023-09-27 18:19:32

我正在使用C#发送电子邮件。当互联网可用时，它工作正常，但它会一次又一次地返回异常消息，并在互联网连接不可用时停止执行。如果连接不可用，我如何忽略发送电子邮件并继续执行，或任何其他合适的方法。。

while (true)
{
    try
    {
        Thread.Sleep(50);
        MailMessage mail = new MailMessage();
        SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
        mail.From = new MailAddress("mymail");
        mail.To.Add("mymail");
        mail.Subject = "data - 1";
        mail.Body = "find attachement";
        System.Net.Mail.Attachment attachment;
        attachment = new System.Net.Mail.Attachment(filepath);
        mail.Attachments.Add(attachment);
        SmtpServer.Port = 587;
        SmtpServer.Credentials = new System.Net.NetworkCredential("myemail", "mypassword");
        SmtpServer.EnableSsl = true;
        SmtpServer.Send(mail);
    }
    catch (Exception)
    {
        MessageBox.Show("Internet Connection is not found");
    }
}

如何忽略发送电子邮件的方法并继续执行

任何依赖于重复尝试的解决方案最终都可能无休止地循环。

您的代码正在同步发送电子邮件，为什么不使用提取目录异步发送呢

这将把电子邮件放入SMTP提取目录，SMTP服务器将通过重试一段可配置的时间来处理暂时的网络问题。

当没有互联网时就跳出循环：

while (true)
    {
        try
        {
            Thread.Sleep(50);
            MailMessage mail = new MailMessage();
            SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
            mail.From = new MailAddress("mymail");
            mail.To.Add("mymail");
            mail.Subject = "data - 1";
            mail.Body = "find attachement";
            System.Net.Mail.Attachment attachment;
            attachment = new System.Net.Mail.Attachment(filepath);
            mail.Attachments.Add(attachment);
            SmtpServer.Port = 587;
            SmtpServer.Credentials = new System.Net.NetworkCredential("myemail", "mypassword");
            SmtpServer.EnableSsl = true;
            SmtpServer.Send(mail);
        }
        catch (Exception)
        {
            MessageBox.Show("Internet Connection is not found");
            break;
        }
    }

最好有一个testconnection方法，如果返回true则发送电子邮件。类似于：

while(true)
{ 
   if(TestConnection())
   {            
        SendEmail();    // you should leave the try...catch.. anyway in case 
                        // the connection failed between the TestConnection     
                        // and the SendEmail() operation. But then do not 
                        // prompt a messagebox, just swallow
        Thread.Sleep(50);       
   }
}

现在实现了TestConnection，您可以尝试从以下链接获得帮助：

在此处输入链接描述

试试这个：

while (true)
    {
        try
        {
            Thread.Sleep(50);
            MailMessage mail = new MailMessage();
            SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
            mail.From = new MailAddress("mymail");
            mail.To.Add("mymail");
            mail.Subject = "data - 1";
            mail.Body = "find attachement";
            System.Net.Mail.Attachment attachment;
            attachment = new System.Net.Mail.Attachment(filepath);
            mail.Attachments.Add(attachment);
            SmtpServer.Port = 587;
            SmtpServer.Credentials = new System.Net.NetworkCredential("myemail", "mypassword");
            SmtpServer.EnableSsl = true;
            SmtpServer.Send(mail);
        }
        catch (Exception ex)
        {
            MessageBox.Show("Error " + ex.InnerException);
            return false;
        }
    }

或者你可以将bool设置为true，然后在最后检查bool是true还是falseFX:

string noInterNet = "";
while (true)
        {
            try
            {
                Thread.Sleep(50);
                MailMessage mail = new MailMessage();
                SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
                mail.From = new MailAddress("mymail");
                mail.To.Add("mymail");
                mail.Subject = "data - 1";
                mail.Body = "find attachement";
                System.Net.Mail.Attachment attachment;
                attachment = new System.Net.Mail.Attachment(filepath);
                mail.Attachments.Add(attachment);
                SmtpServer.Port = 587;
                SmtpServer.Credentials = new System.Net.NetworkCredential("myemail", "mypassword");
                SmtpServer.EnableSsl = true;
                SmtpServer.Send(mail);
            }
            catch (Exception ex)
            {
                noInterNet = ex.InnerException;
            }
        }

然后在代码的末尾做：

if(noInterNet != "")
MessageBox.Show("Error " + noInterNet);
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