C# 简单的定时关机

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;

 namespace AutoCloseComputer
 {
     public partial class Form1 : Form
     {
         public Form1()
         { 

             InitializeComponent();

             //设置默认时间为当前时间
             nud_hour.Value = Convert.ToDecimal(DateTime.Now.Hour);
             nud_min.Value = Convert.ToDecimal(DateTime.Now.Minute);

             txt_sencods.Text = "";  //设置默认时间为10*60秒

         }

         /// <summary>
         /// 启动定时关机程序
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void btnCloseComputer_Click(object sender, EventArgs e)
         {
             lab_result.Text = "";

             string str = txt_sencods.Text.Trim();
             if (string.IsNullOrEmpty(str))
             {
                 lab_result.Text = "时间不能为空";
                 return;
             }

             int seconds = ;
             if (int.TryParse(str, out seconds))
             {
                 OperateComputer("shutdown -s -t " + seconds);
             }
             else
             {
                 lab_result.Text = "时间格式只能输入数字";
             }
         }

         /// <summary>
         /// 取消关机命令
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void btnCancelClose_Click(object sender, EventArgs e)
         {
             OperateComputer("shutdown -a");
         }

         /// <summary>
         /// 操作电脑命令
         /// </summary>
         /// <param name="command"></param>
         private void OperateComputer(string command)
         {
             var startInfo = new System.Diagnostics.ProcessStartInfo("cmd.exe");
             startInfo.UseShellExecute = false;
             startInfo.RedirectStandardInput = true;
             startInfo.RedirectStandardOutput = true;
             startInfo.RedirectStandardError = true;
             startInfo.CreateNoWindow = true;
             var myProcess = new System.Diagnostics.Process();
             myProcess.StartInfo = startInfo;
             myProcess.Start();
             myProcess.StandardInput.WriteLine(command);
         }

         /// <summary>
         /// 指定时间关机
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void btnTimeClose_Click(object sender, EventArgs e)
         {
             int hour = Convert.ToInt32(nud_hour.Value);
             int min = Convert.ToInt32(nud_min.Value);

             DateTime closedt = DateTime.Now;

             //当时间小于当前时认为是第二天的时间
             if(hour<DateTime.Now.Hour)
             {
                 string strdt = DateTime.Now.AddDays(1D).ToString("yyyy-MM-dd") + " " + hour.ToString().PadLeft(,'') + ":" + min.ToString().PadLeft(,'');
                 closedt = Convert.ToDateTime(strdt);

             }else
             {
                 string strdt = DateTime.Now.ToString("yyyy-MM-dd") + " " + hour.ToString().PadLeft(, '') + ":" + min.ToString().PadLeft(, '');
                 closedt = Convert.ToDateTime(strdt);
             }
             //计算出时间差
             int total = Convert.ToInt32((closedt - DateTime.Now).TotalSeconds);
             OperateComputer("shutdown -s -t " + total);

             //一下命令没有效果
             //string command = "at " + hour + ":" + min + " shutdown -s";
             //OperateComputer(command); 

         }

     }
 }

此程序是VS2013编写的。

提供程序的下载链接：https://pan.baidu.com/s/1slpGGsl