在与.NET 3.5的Windows控制台应用程序（我改变了现有的.NET 2.0应用程序到.NET 3.5）

我有奇怪的问题，code用于发送电子邮件的工作几次（可能是5到10倍）。

在几次，它无法与消息失败发送邮件发送电子邮件。同样的code重新启动系统后，工作。 （这是不是在生产预期的溶液）。

下面是一张code，我觉得，冥冥之中我已经接近这个SmtpClient连接。所以我设置客户端为null，叫GC.Collect的为好，但并没有帮助我。

请帮忙

 

私有静态无效SendEmail（MailMessage MSG）
{
            SmtpClient客户=新SmtpClient（GetSMTPServer（），GetSMTPPort（））;

            client.Credentials = CredentialCache.DefaultNetworkCredentials;
            client.EnableSsl = FALSE;
            client.ServicePoint.MaxIdleTime = 1;
            //client.Timeout = GetSMTPTimeout（）; 3000
            client.Send（MSG）;
            客户端= NULL;
            所以GC.Collect（）;
}


 

解决方案

尝试简单地使用使用块来妥善处理 SmtpClient 后发送。

 私有静态无效SendEmail（MailMessage MSG）
{
    使用（SmtpClient客户端=新SmtpClient（GetSMTPServer（），GetSMTPPort（）））
    {
        client.Credentials = CredentialCache.DefaultNetworkCredentials;
        client.EnableSsl = FALSE;
        client.Send（MSG）;
    }
}
 

另请参见：.NET最好的方法来发送电子邮件（System.Net.Mail有问题）

In Windows Console Application with .NET 3.5 ( I changed the existing .NET 2.0 application to .NET 3.5 )

I have strange problem, the code for sending email works few times(may be 5 to 10 times).

After few times, it fails to send the email with message "Failure sending mail". The same code works after restarting the system. ( which is not the expected solution in production).

Here is the piece of code, I felt , somewhere I have close this SmtpClient Connection. so I set the client to null and called GC.Collect as well, but did not help me.

Please help

private static void SendEmail(MailMessage msg)
{
            SmtpClient client = new SmtpClient(GetSMTPServer(), GetSMTPPort());

            client.Credentials = CredentialCache.DefaultNetworkCredentials;
            client.EnableSsl = false;
            client.ServicePoint.MaxIdleTime = 1;
            //client.Timeout = GetSMTPTimeout(); 30000000
            client.Send(msg);
            client = null;
            GC.Collect();
}

Try simply using a using block to properly dispose the SmtpClient after sending.

private static void SendEmail(MailMessage msg)
{
    using(SmtpClient client = new SmtpClient(GetSMTPServer(), GetSMTPPort()))
    {
        client.Credentials = CredentialCache.DefaultNetworkCredentials;
        client.EnableSsl = false;
        client.Send(msg);
    }
}

See also: .NET Best Method to Send Email (System.Net.Mail has issues)