c#调用api控制windows关机示例(可以重启/注销)

方法一：调用windows自带的shutdown.exe (缺点：会出现倒计时窗口)

system.diagnostics.process.start("shutdown.exe", "-r -f -t 15");

shutdown参数含义：-r关闭并重启动此计算机；-f 强制运行的应用程序关闭而没有警告；-t 15 延时15shutdown.exe的详细用法:
shutdown [-i | -l | -s | -r | -a] [-f] [-m //computername] [-t xx] [-c "comment"] [-d up:xx:yy]
没有参数 显示此消息(与 ? 相同)
-i 显示 gui 界面，必须是第一个选项
-l 注销(不能与选项 -m 一起使用)
-s 关闭此计算机
-r 关闭并重启动此计算机
-a 放弃系统关机
-m //computername 远程计算机关机/重启动/放弃
-t xx 设置关闭的超时为 xx 秒
-c "comment" 关闭注释(最大 127 个字符)
-f 强制运行的应用程序关闭而没有警告
-d [u][p]:xx:yy 关闭原因代码
u 是用户代码
p 是一个计划的关闭代码
xx 是一个主要原因代码(小于 256 的正整数)
yy 是一个次要原因代码(小于 65536 的正整数)

方法二：调用api

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";

[flags]
public enum exitwindows : uint
{
logoff = 0x00, //注销
shutdown = 0x01, //关机
reboot = 0x02, //重启
force = 0x04,
poweroff = 0x08,
forceifhung = 0x10
}

[flags]
private enum shutdownreason : uint
{
majorapplication = 0x00040000,
majorhardware = 0x00010000,
majorlegacyapi = 0x00070000,
majoroperatingsystem = 0x00020000,
majorother = 0x00000000,
majorpower = 0x00060000,
majorsoftware = 0x00030000,
majorsystem = 0x00050000,
minorbluescreen = 0x0000000f,
minorcordunplugged = 0x0000000b,
minordisk = 0x00000007,
minorenvironment = 0x0000000c,
minorhardwaredriver = 0x0000000d,
minorhotfix = 0x00000011,
minorhung = 0x00000005,
minorinstallation = 0x00000002,
minormaintenance = 0x00000001,
minormmc = 0x00000019,
minornetworkconnectivity = 0x00000014,
minornetworkcard = 0x00000009,
minorother = 0x00000000,
minorotherdriver = 0x0000000e,
minorpowersupply = 0x0000000a,
minorprocessor = 0x00000008,
minorreconfig = 0x00000004,
minorsecurity = 0x00000013,
minorsecurityfix = 0x00000012,
minorsecurityfixuninstall = 0x00000018,
minorservicepack = 0x00000010,
minorservicepackuninstall = 0x00000016,
minortermsrv = 0x00000020,
minorunstable = 0x00000006,
minorupgrade = 0x00000003,
minorwmi = 0x00000015,
flaguserdefined = 0x40000000,
flagplanned = 0x80000000
}

[structlayout(layoutkind.sequential, pack = 1)]
private struct tokpriv1luid
{
public int count;
public long luid;
public int attr;
}

[dllimport("kernel32.dll", exactspelling = true)]
private static extern intptr getcurrentprocess();

[dllimport("advapi32.dll", exactspelling = true, setlasterror = true)]
private static extern bool openprocesstoken(intptr h, int acc, ref intptr phtok);

[dllimport("advapi32.dll", setlasterror = true)]
private static extern bool lookupprivilegevalue(string host, string name, ref long pluid);

[dllimport("advapi32.dll", exactspelling = true, setlasterror = true)]
private static extern bool adjusttokenprivileges(intptr htok, bool disall, ref tokpriv1luid newst, int len, intptr prev, intptr relen);

[dllimport("user32.dll")]
private static extern bool exitwindowsex(exitwindows uflags, shutdownreason dwreason);

/// <summary>
/// 关机、重启、注销windows
/// </summary>
/// <param name="flag"></param>
public static void doexitwindows(exitwindows flag)
{
tokpriv1luid tp;
intptr hproc = getcurrentprocess();
intptr htok = intptr.zero;
openprocesstoken(hproc, token_adjust_privileges | token_query, ref htok);
tp.count = 1;
tp.luid = 0;
tp.attr = se_privilege_enabled;
lookupprivilegevalue(null, se_shutdown_name, ref tp.luid);
adjusttokenprivileges(htok, false, ref tp, 0, intptr.zero, intptr.zero);
exitwindowsex(flag, shutdownreason.majorother);
}