C#教程之C#实现关机重启及注销实例代码

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C#教程之C#实现关机重启及注销实例代码
本文所述的C#实例代码是一个基于Visual C#2010编写的关机、重启、注销程序，类似的C#程序网上还有不少，每个人的写法都各有不同，这段程序供新手参考下。本代码中还用到了一个计时器，用来显示系统运行的时间，以下为完整实例代码：
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using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.Runtime.InteropServices;

using System.Threading;

namespace shutdowncodes

{

 public class Form1 : System.Windows.Forms.Form

 {

 private System.Windows.Forms.GroupBox groupBox1;

 private System.Windows.Forms.TextBox textBox1;

 private System.Windows.Forms.Button button1;

 private System.Windows.Forms.Button button2;

 private System.Windows.Forms.Button button3;

 private System.ComponentModel.IContainer components;

 [StructLayout(LayoutKind.Sequential, Pack=1)]

 public struct TokPriv1Luid

 {

  public int Count;

  public long Luid;

  public int Attr;

 }

 [DllImport("kernel32.dll", ExactSpelling=true)]

  // GetCurrentProcess函数返回当前进程的一个句柄

 public static extern IntPtr GetCurrentProcess();

 [DllImport("advapi32.dll", ExactSpelling=true, SetLastError=true)]

  // OpenProcessToken函数打开一个进程的访问代号

 public static extern bool OpenProcessToken(IntPtr ProcessHandles, int DesiredAccess, ref IntPtr TokenHandle);

 [DllImport("advapi32.dll", SetLastError=true)]

  // LookupPrivilegeValue函数获得本地唯一的标示符(LUID)，用于在特定的系统中

  // 表示特定的优先权。

 public static extern bool LookupPrivilegeValue(string lpSystemName, string lpName, ref long lpLuid);

 // AdjustTokenPrivileges函数允许或者禁用指定访问记号的优先权。

 // 允许或者禁用优先权需要TOKEN_ADJUST_PRIVILEGES访问权限。

 [DllImport("advapi32.dll", ExactSpelling=true, SetLastError=true)]

 public static extern bool AdjustTokenPrivileges(IntPtr TokenHandle, bool DisableAllPrivileges, ref TokPriv1Luid NewState, int BufferLength, IntPtr PreviousState,IntPtr ReturnLength);

 // ExitWindowsEx函数可以注销，关机或者重新启动系统

 [DllImport("user32.dll", ExactSpelling=true, SetLastError=true)]

 public static extern bool ExitWindowsEx(int flg, int rea);

 private System.Threading.Timer timer;

 private const int SE_PRIVILEGE_ENABLED = 0x00000002;

 private const int TOKEN_QUERY = 0x00000008;

 private const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;

 private const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";

 private const int EWX_LOGOFF = 0x00000000;   // 注销

 private const int EWX_SHUTDOWN = 0x00000001;  // 关机

 private const int EWX_REBOOT = 0x00000002;   // 重启

 private const int EWX_FORCE = 0x00000004;

 private static void RebootCommand(int flg)

 {

  bool ok;

  TokPriv1Luid tp;

  IntPtr hproc = GetCurrentProcess(); // 得到当前的进程

  IntPtr htok = IntPtr.Zero;

  ok = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);

  tp.Count = 1;

  tp.Luid = 0;

  tp.Attr = SE_PRIVILEGE_ENABLED;

  ok = LookupPrivilegeValue(null, SE_SHUTDOWN_NAME, ref tp.Luid);

  ok = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);

  ok = ExitWindowsEx(flg, 0);

 }

 public Form1()

 {

  InitializeComponent();

 }

 protected override void Dispose( bool disposing )

 {

  if( disposing )

  {

  if (components != null)

  {

   components.Dispose();

  }

  }

  base.Dispose( disposing );

 }

 #region Windows 窗体设计器生成的代码

 private void InitializeComponent()

 {

  this.groupBox1 = new System.Windows.Forms.GroupBox();

  this.textBox1 = new System.Windows.Forms.TextBox();

  this.button1 = new System.Windows.Forms.Button();

  this.button2 = new System.Windows.Forms.Button();

  this.button3 = new System.Windows.Forms.Button();

  this.groupBox1.SuspendLayout();

  this.SuspendLayout();

  //

  // groupBox1

  //

  this.groupBox1.Controls.Add(this.textBox1);

  this.groupBox1.Location = new System.Drawing.Point(48, 24);

  this.groupBox1.Name = "groupBox1";

  this.groupBox1.Size = new System.Drawing.Size(192, 56);

  this.groupBox1.TabIndex = 0;

  this.groupBox1.TabStop = false;

  this.groupBox1.Text = "系统已运行时间";

  //

  // textBox1

  //

  this.textBox1.Location = new System.Drawing.Point(24, 24);

  this.textBox1.Name = "textBox1";

  this.textBox1.ReadOnly = true;

  this.textBox1.Size = new System.Drawing.Size(152, 21);

  this.textBox1.TabIndex = 1;

  this.textBox1.Text = "";

  //

  // button1

  //

  this.button1.Location = new System.Drawing.Point(16, 112);

  this.button1.Name = "button1";

  this.button1.Size = new System.Drawing.Size(64, 32);

  this.button1.TabIndex = 1;

  this.button1.Text = "关闭系统";

  this.button1.Click += new System.EventHandler(this.button1_Click);

  //

  // button2

  //

  this.button2.Location = new System.Drawing.Point(112, 112);

  this.button2.Name = "button2";

  this.button2.Size = new System.Drawing.Size(64, 32);

  this.button2.TabIndex = 2;

  this.button2.Text = "注销系统";

  this.button2.Click += new System.EventHandler(this.button2_Click);

  //

  // button3

  //

  this.button3.Location = new System.Drawing.Point(208, 112);

  this.button3.Name = "button3";

  this.button3.Size = new System.Drawing.Size(64, 32);

  this.button3.TabIndex = 3;

  this.button3.Text = "重启系统";

  this.button3.Click += new System.EventHandler(this.button3_Click);

  //

  // Form1

  //

  this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);

  this.ClientSize = new System.Drawing.Size(296, 173);

  this.Controls.Add(this.button3);

  this.Controls.Add(this.button2);

  this.Controls.Add(this.button1);

  this.Controls.Add(this.groupBox1);

  this.Name = "Form1";

  this.Text = "简单的关机程序";

  this.Load += new System.EventHandler(this.Form1_Load);

  this.groupBox1.ResumeLayout(false);

  this.ResumeLayout(false);

 }

 #endregion

 /// <summary>

 /// 应用程序的主入口点。

 /// </summary>

 [STAThread]

 static void Main()

 {

  Application.Run(new Form1());

 }

 private void button1_Click(object sender, System.EventArgs e)

 {

  RebootCommand(EWX_SHUTDOWN + EWX_FORCE);

 }

 private void button2_Click(object sender, System.EventArgs e)

 {

  RebootCommand(EWX_LOGOFF + EWX_FORCE);

 }

 private void button3_Click(object sender, System.EventArgs e)

 {

  RebootCommand(EWX_REBOOT + EWX_FORCE);

 }

 private void Form1_Load(object sender, System.EventArgs e)

 {

  textBox1.Text = (Environment.TickCount / (1000 * 60)).ToString() + "分钟";

  // 每1秒钟更新一次TextBox上显示的系统运行时间

  timer = new System.Threading.Timer(new TimerCallback(OnTimer), null, 0, 1000);

 }

 // 获得系统已运行的时间

 private void OnTimer(object state)

 {

  textBox1.Text = (Environment.TickCount / (1000 * 60)).ToString() + "分钟";

  textBox1.Refresh();

 }

 }

}
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