代码补充,求大虾帮忙看看　　

namespace widFileCheck
{
    public partial class Form1 : Form
    {
        System.Timers.Timer t = new System.Timers.Timer(86400000);//24小时执行一次
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_SizeChanged(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)
            {
                this.Hide();
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //Process
            System.Diagnostics.Process current = System.Diagnostics.Process.GetCurrentProcess();
            System.Diagnostics.Process[] processes = System.Diagnostics.Process.GetProcessesByName(current.ProcessName);
            //查找相同名称的进程
            foreach (System.Diagnostics.Process process in processes)
            {
                //忽略当前进程
                if (process.Id != current.Id)
                {
                    //确认相同进程的程序运行位置是否一样.
                    if (Assembly.GetExecutingAssembly().Location.Replace("/", "\\") == current.MainModule.FileName)
                    {
                        //Return the other process instance.
                        Application.Exit();
                    }
                }
            }
            t.Start();
            Application.DoEvents();
            t.Elapsed += new System.Timers.ElapsedEventHandler(theout);//到达时间的时候执行事件；
            t.AutoReset = true;//配置是执行一次（false）还是一直执行(true)；
            t.Enabled = true;//是否执行System.Timers.Timer.Elapsed事件；
            t.Start();
        }
        public void theout(object source, System.Timers.ElapsedEventArgs e)
        {
            DateTime dateTimeNow = DateTime.Now;
            int nowHour = dateTimeNow.Hour;
            int nowMinute = dateTimeNow.Minute;
            int nowMillisecond = dateTimeNow.Millisecond;
            int checkHour = 23;
            int checkMinute = 59;
            int checkMillisecond = 59;
            #region 扫描文件
            IPAddress[] HostAdress = Dns.GetHostByName(Dns.GetHostName()).AddressList;//获得当前电脑IP地址
            string HostIpAdress = HostAdress[0].ToString();
            string strDateTimeNow = dateTimeNow.ToShortDateString();//当前时间
            string checkDateSql = "select * from T_CheckBack where f_ipaddress='" + HostIpAdress + "'and f_nextDate='" + strDateTimeNow + "'" + "and F_FileSate='0'";
            DataTable dt = SqlHelper.ExcutDaTaAdaper(checkDateSql);
            if (dt.Rows.Count > 0)
            {
                if (nowHour == checkHour && nowMinute == checkMinute && nowMillisecond == checkMillisecond)
                {
                    for (int i = 0; i < dt.Rows.Count; i++)
                    {
                        ArrayList noBackupFile = new ArrayList();//未备份文件
                        //string[] noBackupFile = new string[] { };//未备份文件
                        DataRow dr = dt.Rows[i];
                        string fileName = Path.GetFileName(dr[2].ToString()).ToString();//文件名
                        FileInfo info = new FileInfo(fileName);
                        DateTime lastUpdateTime = info.LastWriteTime;//最后更新时间
                        if (lastUpdateTime.ToShortDateString() != strDateTimeNow)
                        {
                            ArrayList mailAdress = new ArrayList();//收件人
                            mailAdress.Add("");
                            mailAdress.Add("");
                            string fromEmail = "";
                            string fromName = "";
                            string reEmail = "";
                            //string toEmail = "";
                            string mailTitle = "服务器未及时备份文件提醒";
                            StringBuilder sb = new StringBuilder();
                            sb.AppendLine("各位：");
                            sb.AppendLine("  " + HostAdress + "服务器文件：" + fileName + "未及时备份，请注意，谢谢。");
                            string mailBody = sb.ToString();
                            string filenames = fileName;
                            noBackupFile.Add(fileName);//文件
                            MailClass mail = new MailClass();
                            for (int j = 0; j < mailAdress.Count; j++)//发送邮件
                            {
                                mail.SendMailnew(fromEmail, fromName, reEmail, mailAdress[j].ToString(), mailTitle, mailBody, filenames);
                            }
                            string NextCheckDate = Convert.ToDateTime(dr[4]).AddDays(Convert.ToDouble(dr[3])).ToString();
                            string fineseSql = "update T_CheckBack set F_CheckDate='" + strDateTimeNow + "',F_FileSate='1'";
                            int resul = SqlHelper.ExceutNoneQuerry(fineseSql);//更新检查标记
                            if (resul < 0)
                            {
                                MessageBox.Show("系统出错，请联系相关人员");
                                return;
                            }
                        }
                        else
                        {
                            string insertNewSql = "insert into T_CheckBack(F_IPAddress,F_FileName,F_CheckPeriod,F_NextDate) values(' ";
                            insertNewSql += dr[1] + "','" + dr[2] + "','" + dr[3] + "','" + dr[4] + "'";
                            int re = SqlHelper.ExceutNoneQuerry(insertNewSql);
                            if (re < 0)
                            {
                                MessageBox.Show("系统出错，请联系相关人员");
                                return;
                            }
                        }
                    }
                }

            }
            #endregion
        }