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   源码介绍

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;


namespace WindowsSi
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                using (Process process = new Process())
                {
                    Application.ExitThread();
                    Application.Exit();
                    Application.Restart();
                    process.WaitForExit();//等待退出
                    process.Close();//关闭进程
                    Process.GetCurrentProcess().Kill();
                    //this.Close();
                }
            }
            catch
            {
            }
            //Application.ExitThread();
            //Application.Exit();
            //Application.Restart();
            //Process.GetCurrentProcess().Kill();

        }

        private void Form1_Load(object sender, EventArgs e)
        {

            //System.Diagnostics.Process process = new System.Diagnostics.Process();
            //process.StartInfo.FileName = @"cmd.exe";
            //System.Diagnostics.Process.Start("cmd.exe");
            //System.Diagnostics.Process.Start(@"cmd.exe").WaitForExit(10);
            this.FormClosing  = Form1_FormClosing;
            //    Process[] app = Process.GetProcessesByName("cmd");
            //if (app.Length > 0)
            //{
            //    MessageBox.Show("请关闭已经启动的程序后再进行尝试");
            //    return;
            //}
            //else
            //{
            //    //
            //   System.Diagnostics.Process.Start("cmd.exe");
            //}

            //process.Start();
        }
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {

            //MessageBox.Show("是否关闭窗体电脑会重新启动");
         
        }
        public void Exec(string str)
        {
            try
            {
                using (Process process = new Process())
                {
                    //process.StartInfo.FileName = "cmd.exe";//调用cmd.exe程序
                    process.StartInfo.UseShellExecute = false;
                    process.StartInfo.RedirectStandardInput = true;//重定向标准输入
                    process.StartInfo.RedirectStandardOutput = true;//重定向标准输出
                    process.StartInfo.RedirectStandardError = true;//重定向标准出错
                    process.StartInfo.CreateNoWindow = true;//不显示黑窗口
                    process.Start();//开始调用执行
                    process.StandardInput.WriteLine(str   "&exit");//标准输入str   "&exit"，相等于在cmd黑窗口输入str   "&exit"
                    process.StandardInput.AutoFlush = true;//刷新缓冲流，执行缓冲区的命令，相当于输入命令之后回车执行
                    process.WaitForExit();//等待退出
                    process.Close();//关闭进程
                }
            }
            catch
            {
            }
        }
        //执行关机操作
        public void Shutdown()
        {
            this.Exec("shutdown -s -f -t 0");
        }
        private void btn_count_Click(object sender, EventArgs e)

        {

            for (int i = 1; i <= 100; i  )

            {

                textBox1.Text = i.ToString();

                Application.DoEvents();

                this.btn_count.Value = i;

                System.Threading.Thread.Sleep(300);

                this.label1.Text = i.ToString();

            }
        }
    }
}