C#强制关机、重启以及注销计算机

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace CommonDLL
{
public class ShutDownSys
{

//C#关机代码
// 这个结构体将会传递给API。使用StructLayout
//(...特性，确保其中的成员是按顺序排列的，C#编译器不会对其进行调整。
[StructLayout(LayoutKind.Sequential, Pack = 1)]
internal struct TokPriv1Luid
{
public int Count; public long Luid; public int Attr;
}
// 以下使用DllImport特性导入了所需的Windows API。
// 导入的方法必须是static extern的，并且没有方法体。
//调用这些方法就相当于调用Windows API。
[DllImport("kernel32.dll", ExactSpelling = true)]
internal static extern IntPtr GetCurrentProcess();
[DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
internal static extern bool OpenProcessToken(IntPtr h, int acc, ref IntPtr phtok);
[DllImport("advapi32.dll", SetLastError = true)]
internal static extern bool LookupPrivilegeValueA
(string host, string name, ref long pluid);
[DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
internal static extern bool
AdjustTokenPrivileges(IntPtr htok, bool disall, ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen);
[DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]
internal static extern bool ExitWindowsEx(int flg, int rea);
//C#关机代码
// 以下定义了在调用WinAPI时需要的常数。
//这些常数通常可以从Platform SDK的包含文件（头文件）中找到
public const int SE_PRIVILEGE_ENABLED = 0x00000002;
public const int TOKEN_QUERY = 0x00000008;
public const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;
public const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";
public const int EWX_LOGOFF = 0x00000000;
public const int EWX_SHUTDOWN = 0x00000001;
public const int EWX_REBOOT = 0x00000002;
public const int EWX_FORCE = 0x00000004;
public const int EWX_POWEROFF = 0x00000008;
public const int EWX_FORCEIFHUNG = 0x00000010;
// 通过调用WinAPI实现关机，主要代码再最后一行ExitWindowsEx  //这调用了同名的WinAPI，正好是关机用的。
//C#关机代码
public static void DoExitWin(int flg)
{
bool ok;
TokPriv1Luid tp;
IntPtr hproc = GetCurrentProcess();
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 = LookupPrivilegeValueA(null, SE_SHUTDOWN_NAME, ref tp.Luid);
ok = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);
ok = ExitWindowsEx(flg, 0);
}
<pre name="code" class="csharp"><span style="font-family: Arial, Helvetica, sans-serif;">    }</span>

调用：

<pre name="code" class="csharp">public void Reboot(){ShutDownSys.DoExitWin(ShutDownSys.EWX_FORCE | ShutDownSys.EWX_REBOOT);}public void ShutDown(){ShutDownSys.DoExitWin(ShutDownSys.EWX_FORCE | ShutDownSys.EWX_POWEROFF);}public void LogOff(){ShutDownSys.DoExitWin(ShutDownSys.EWX_FORCE | ShutDownSys.EWX_LogOFF);}