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15秒
shutdown.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
1 private const int SE_PRIVILEGE_ENABLED = 0x00000002; 2 private const int TOKEN_QUERY = 0x00000008; 3 private const int TOKEN_ADJUST_PRIVILEGES = 0x00000020; 4 private const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege"; 5 6 [Flags] 7 public enum ExitWindows : uint 8 { 9 LogOff = 0x00, //注销 10 ShutDown = 0x01, //关机 11 Reboot = 0x02, //重启 12 Force = 0x04, 13 PowerOff = 0x08, 14 ForceIfHung = 0x10 15 } 16 17 [Flags] 18 private enum ShutdownReason : uint 19 { 20 MajorApplication = 0x00040000, 21 MajorHardware = 0x00010000, 22 MajorLegacyApi = 0x00070000, 23 MajorOperatingSystem = 0x00020000, 24 MajorOther = 0x00000000, 25 MajorPower = 0x00060000, 26 MajorSoftware = 0x00030000, 27 MajorSystem = 0x00050000, 28 MinorBlueScreen = 0x0000000F, 29 MinorCordUnplugged = 0x0000000b, 30 MinorDisk = 0x00000007, 31 MinorEnvironment = 0x0000000c, 32 MinorHardwareDriver = 0x0000000d, 33 MinorHotfix = 0x00000011, 34 MinorHung = 0x00000005, 35 MinorInstallation = 0x00000002, 36 MinorMaintenance = 0x00000001, 37 MinorMMC = 0x00000019, 38 MinorNetworkConnectivity = 0x00000014, 39 MinorNetworkCard = 0x00000009, 40 MinorOther = 0x00000000, 41 MinorOtherDriver = 0x0000000e, 42 MinorPowerSupply = 0x0000000a, 43 MinorProcessor = 0x00000008, 44 MinorReconfig = 0x00000004, 45 MinorSecurity = 0x00000013, 46 MinorSecurityFix = 0x00000012, 47 MinorSecurityFixUninstall = 0x00000018, 48 MinorServicePack = 0x00000010, 49 MinorServicePackUninstall = 0x00000016, 50 MinorTermSrv = 0x00000020, 51 MinorUnstable = 0x00000006, 52 MinorUpgrade = 0x00000003, 53 MinorWMI = 0x00000015, 54 FlagUserDefined = 0x40000000, 55 FlagPlanned = 0x80000000 56 } 57 58 [StructLayout(LayoutKind.Sequential, Pack = 1)] 59 private struct TokPriv1Luid 60 { 61 public int Count; 62 public long Luid; 63 public int Attr; 64 } 65 66 [DllImport("kernel32.dll", ExactSpelling = true)] 67 private static extern IntPtr GetCurrentProcess(); 68 69 [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)] 70 private static extern bool OpenProcessToken(IntPtr h, int acc, ref IntPtr phtok); 71 72 [DllImport("advapi32.dll", SetLastError = true)] 73 private static extern bool LookupPrivilegeValue(string host, string name, ref long pluid); 74 75 [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)] 76 private static extern bool AdjustTokenPrivileges(IntPtr htok, bool disall, ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen); 77 78 [DllImport("user32.dll")] 79 private static extern bool ExitWindowsEx(ExitWindows uFlags, ShutdownReason dwReason); 80 81 /// <summary> 82 /// 关机、重启、注销windows 83 /// </summary> 84 /// <param name="flag"></param> 85 public static void DoExitWindows(ExitWindows flag) 86 { 87 TokPriv1Luid tp; 88 IntPtr hproc = GetCurrentProcess(); 89 IntPtr htok = IntPtr.Zero; 90 OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok); 91 tp.Count = 1; 92 tp.Luid = 0; 93 tp.Attr = SE_PRIVILEGE_ENABLED; 94 LookupPrivilegeValue(null, SE_SHUTDOWN_NAME, ref tp.Luid); 95 AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero); 96 ExitWindowsEx(flag, ShutdownReason.MajorOther); 97 }