使用c#对windows进行关机、重启或注销

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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 }