写windows服务日志.net4.5.2定时修改数据库中某些参数的步骤

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="nlog" type="NLog.Config.ConfigSectionHandler, NLog"/>
  </configSections>
  <nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <targets>
      <target name="file" xsi:type="File" fileName="${basedir}/Logs/${date:format=yyyy-MM-dd}/${date:format=yyyy-MM-dd}.txt" layout="[${date:format=yyyy-MM-dd HH\:mm\:ss}][${level}] ${message} ${exception}"/>
    </targets>
    <rules>
      <logger name="*" minlevel="Debug" writeTo="file"/>
    </rules>
  </nlog>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
  </startup>
</configuration>

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;
using System.Timers;
using NLog;  // 引入 NLog 命名空间，用于日志记录
namespace Report_print
{
    public partial class Report_Print : ServiceBase
    {
        private Timer _timer;
        private readonly string _connectionString = "Data Source=.;Initial Catalog=【自己数据库】;User Id=sa;Password=【自己的密码】;";
        // 创建一个静态日志记录器实例，用于在服务中记录日志
        private static readonly Logger Log = LogManager.GetCurrentClassLogger();
        public Report_Print()
        {
            InitializeComponent();
            // 设置服务每5分钟检查一次
            _timer = new Timer(5 * 60 * 1000); // 5分钟
            _timer.Elapsed += TimerElapsed;
        }
        protected override void OnStart(string[] args)
        {
            // 服务启动时记录日志
            Log.Debug("开始执行");
            _timer.Start();
            // 启动时立即执行一次
            UpdatePrintType();
        }
        protected override void OnStop()
        {
            _timer.Stop();
            // 服务启动时记录日志
            Log.Debug("服务停止执行");
        }
        private void TimerElapsed(object sender, ElapsedEventArgs e)
        {
            UpdatePrintType();
        }
        private void UpdatePrintType()
        {
            try
            {
                using (SqlConnection conn = new SqlConnection(_connectionString))
                {
                    conn.Open();
                    string sql = @"
                        UPDATE JD_Reports 
                        SET PrintType = 1 
                        WHERE Depart = '体检科' 
                        AND CheckTime >= DATEADD(HOUR, -24, GETDATE())
                        AND (PrintType IS NULL OR PrintType != 1)";
                    using (SqlCommand cmd = new SqlCommand(sql, conn))
                    {
                        int rowsAffected = cmd.ExecuteNonQuery();
                        Log.Debug("写入日志成功: " + rowsAffected.ToString());
                        // 这里可以添加日志记录受影响的行数
                    }
                }
            }
            catch (Exception ex)
            {
                // 这里应该添加适当的错误日志记录
                // 例如使用 EventLog 或其他日志框架
            }
        }
    }
}

sc create Report_Print binPath= "E:\vs2015\study\Report_print\Report_print\bin\Debug\Report_print.exe"
sc start Report_Print 

sc stop Report_Print
sc delete Report_Print