C#利用Process打开关闭外部程序

1、新建一个WinForm工程。点击【新建项目】弹出新建项目窗口，在C#模板下选择【WinForm应用程序】，输入项目名称：OpenProcess，点击【确定】

2、在Form1.Designer.cs页面中找到 partial class Form1{……}整段代码，即图中框选区域代码，用下面代码进行替换。

    partial class Form1

    {
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>

        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows 窗体设计器生成的代码

        /// <summary>

        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            this.button1 = new System.Windows.Forms.Button();
            this.button2 = new System.Windows.Forms.Button();
            this.timer1 = new System.Windows.Forms.Timer(this.components);
            this.SuspendLayout();
            //
            // button1
            //
            this.button1.Location = new System.Drawing.Point(13, 13);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(218, 32);
            this.button1.TabIndex = 0;
            this.button1.Text = "打开计算器";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            //
            // button2
            //
            this.button2.Location = new System.Drawing.Point(15, 61);
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size(215, 34);
            this.button2.TabIndex = 1;
            this.button2.Text = "启动自动关机";
            this.button2.UseVisualStyleBackColor = true;
            this.button2.Click += new System.EventHandler(this.button2_Click);
            //
            // timer1
            //
            this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
            //
            // Form1
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(241, 261);
            this.Controls.Add(this.button2);
            this.Controls.Add(this.button1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.Button button1;

        private System.Windows.Forms.Button button2;
        private System.Windows.Forms.Timer timer1;
    }

3、在Form1页面中找到public partial class Form1 : Form{……}整段代码，即图中框选区域代码，用下面代码进行替换。

    public partial class Form1 : Form

    {
        public Form1()
        {
            InitializeComponent();
        }

        private static Dictionary<string, System.Diagnostics.Process> Procs = new Dictionary<string, System.Diagnostics.Process>();

        private DateTime shutdowntime;
        private static System.Diagnostics.Process OpenFileName(string FileName, string Arguments)
        {
            System.IO.FileInfo f = new System.IO.FileInfo(FileName);
            if (!f.Exists)
            {
                return null;
            }
            FileName = f.FullName;
            string WorkingDirectory = System.IO.Path.GetDirectoryName(f.FullName);
            string filename = f.Name;
            //声明一个程序信息类
            System.Diagnostics.ProcessStartInfo Info = new System.Diagnostics.ProcessStartInfo();
            //设置外部程序名
            Info.FileName = filename;
            //设置外部程序的启动参数（命令行参数）为test.txt
            Info.Arguments = Arguments;
            //设置外部程序工作目录为 C:\
            Info.WorkingDirectory = WorkingDirectory;
            try
            {
                //声明一个程序类
                //
                //启动外部程序
                //
                if (!Procs.ContainsKey(FileName))
                {
                    Procs[FileName] = System.Diagnostics.Process.Start(Info);
                }
                else
                {
                    try
                    {
                        DateTime dt = Procs[FileName].ExitTime;
                        DateTime now = DateTime.Now;
                        TimeSpan ts = now - dt;
                        if (ts.Milliseconds > 0)
                        {
                            Procs[FileName] = System.Diagnostics.Process.Start(Info);
                        }
                    }
                    catch
                    {

                    }

                }
            }
            catch (System.ComponentModel.Win32Exception ea)
            {
                return null;
            }
            return Procs[FileName];
        }
        private static void ColseFileName(string FileName)
        {
            System.IO.FileInfo f = new System.IO.FileInfo(FileName);
            if (!f.Exists)
            {
                return;
            }
            FileName = f.FullName;
            System.Diagnostics.Process Proc = null;
            if (Procs.ContainsKey(FileName))
            {
                Proc = Procs[FileName];
            }
            else
            {
                //没有关联启动程序
                return;
            }
            //打印出外部程序的开始执行时间
            //Console.WriteLine("外部程序的开始执行时间：{0}", Proc.StartTime);
            DateTime StartTime = Proc.StartTime;
            DateTime now = DateTime.Now;
            TimeSpan ts = now - StartTime;
            if (ts.Milliseconds < 3000)
            {
                //System.Windows.Forms.MessageBox.Show("操作过于频繁，程序启动不足3秒钟");
                //等待3秒钟
                //Proc.WaitForExit(3000);
            }
            //如果这个外部程序没有结束运行则对其强行终止
            if (Proc.HasExited == false)
            {
                //Console.WriteLine("由主程序强行终止外部程序的运行！");
                Proc.Kill();
            }
            else
            {
                //Console.WriteLine("由外部程序正常退出！");
            }
            //Console.WriteLine("外部程序的结束运行时间：{0}", Proc.ExitTime);
            //Console.WriteLine("外部程序在结束运行时的返回值：{0}", Proc.ExitCode);
            bool ExitYes = true;
            while (ExitYes)
            {
                try
                {
                    DateTime dt = Procs[FileName].ExitTime;
                    now = DateTime.Now;
                    ts = now - dt;
                    if (ts.Milliseconds > 50)
                    {
                        ExitYes = false;
                        Procs.Remove(FileName);
                    }
                }
                catch
                {
                    //System.Threading.Thread.Sleep(100);
                }
            }
        }

        private void button1_Click(object sender, EventArgs e)

        {
            if (button1.Text == "打开计算器")
            {
                OpenFileName(@"C:\Windows\System32\Calc.exe", "");
                button1.Text = "关闭计算器";
            }
            else
            {
                ColseFileName(@"C:\Windows\System32\Calc.exe");
                button1.Text = "打开计算器";
            }
        }

        private void button2_Click(object sender, EventArgs e)

        {
            if (button2.Text == "启动1小时后自动关机")
            {
                OpenFileName(@"C:\Windows\System32\shutdown.exe", "-s -t 3600");
                button2.Text = "中断1小时后自动关机";
                this.shutdowntime = DateTime.Now+new  TimeSpan(1,0,0) ;
                timer1.Enabled = true;
            }
            else
            {
                timer1.Enabled = false;
                ColseFileName(@"C:\Windows\System32\shutdown.exe");
                button2.Text = "启动1小时后自动关机";
            }
        }

        private void timer1_Tick(object sender, EventArgs e)

        {
            TimeSpan tp=  this.shutdowntime-DateTime.Now;
            string str=   tp.Hours.ToString ()+"小时"+ tp.Minutes .ToString ()+"分"+tp.Seconds .ToString ()+"秒";
            button2.Text = "中断"+str+"后自动关机";
        }
    }

4、编译代码，生成解决方案。按F5执行

5、点击【打开计算器】，可以发现计算器被打开，然后点击【关闭计算器】，计算器程序则被关闭

6、点击【启动自动关机】，计算机将在1小时后自动关机。