c# - 每当我启动服务时，邮件都不会发送，但当我调试时，它会按我预期的那样发送邮件

Question

每当我启动服务时，它都没有执行任何操作，因为服务不是“发送邮件”，但是当我调试它时，它会按我预期的那样发送邮件。我不知道为什么会这样。我想这不是代码的问题。因为我在调试时编码运行良好。请给我建议。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.Net.Mail;
using System.ServiceProcess;
using System.Text;
using System.Threading.Tasks;
using System.Timers;
namespace MyUtility1
{
    public partial class Service1 : ServiceBase
    {

        public Service1()
        {
            InitializeComponent();
            OnStart(null);
        }



        protected override void OnStart(string[] args)
        {
            Timer t1;
            t1 = new System.Timers.Timer();
            t1.Enabled = true;

            Task.Run(() =>
                {

                EnvVars envVars = EnvVars.GetSettings();
                });

        }


        protected override void OnStop()
        {
        }     
    }  
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;

using System.Net.Mail;
using System.ServiceProcess;

using System.Threading.Tasks;
using System.Timers;
using System.Configuration;
using System.IO;

namespace MyUtility1
{
  public  class EnvVars
    {

        public static EnvVars GetSettings()
        {    EnvVars envVars = new EnvVars();

            String[] files = Directory.GetFiles(@"H:\\EDI", "*.brl", SearchOption.AllDirectories);
            if (files.Length > 0)
            {
                var mail_server1 = ConfigurationManager.AppSettings.Get("mail_server");
                var mail_from_address1 = ConfigurationManager.AppSettings.Get("mail_from_address");

                var mail_address1 = ConfigurationManager.AppSettings.Get("mail_address");

                MailMessage mm = new MailMessage(mail_from_address1, mail_address1);

                mm.Body = ConfigurationManager.AppSettings.Get("body");

                mm.Subject = ConfigurationManager.AppSettings.Get("subject");

                mm.IsBodyHtml = true;

                int leng = files.Length;
                for (int i = 0; i < files.Length; i++)
               {
                  String sep = "   |  ";

                    String Body1 = String.Join(sep, files, 0, leng);
                   mm.Body = Body1;
                }

                SmtpClient client = new SmtpClient(mail_server1);
                try
                {
                    client.Send(mm);
                }
                catch (Exception e) { }

            }

           return envVars;
        }

    }
}
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
      <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    </startup>

    <system.web>
      <authorization>
        <allow users="dkamd@gmail.com" />

      </authorization>
    </system.web>
  <system.net>
    <mailSettings>
      <smtp deliveryMethod="Network">
        <network host="localhost"
                 port="25"
                 defaultCredentials="true" />
      </smtp>
    </mailSettings>
  </system.net>
  <appSettings>

    <add key="mail_server" value="mail.gmail.com"/>
    <add key="mail_address" value="dkamd@gmail.com"/>
    <add key="mail_from_address" value="dkamd@gmail.com"/>
    <add key="body"  value="New file found"/>
    <add key="subject" value="BRL files"/>
    </appSettings>
  </configuration>

Answer 1

可能在调试时，您的应用程序有足够的时间发送电子邮件。

把你的代码改成这个:

Task t = Task.Run(() => {
            EnvVars envVars = EnvVars.GetSettings();
            });
t.Wait();