C# 快速关机代码

今天用到这个，网上找个不错的，保存下来。

注意：这个方法是快速关机，不会保存你的任何未保存信息。

// 这个结构体将会传递给API。使用StructLayout
[StructLayout(LayoutKind.Sequential, Pack = 1)]
internal struct TokPriv1Luid
{
public int Count;
public long Luid;
public int Attr;
}

// 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 LookupPrivilegeValue(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);

// 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
internal const int SE_PRIVILEGE_ENABLED = 0x00000002;
internal const int TOKEN_QUERY = 0x00000008;
internal const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;
internal const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";
internal const int EWX_SHUTDOWN = 0x00000001;
//internal const int EWX_LOGOFF = 0x00000000;
//internal const int EWX_REBOOT = 0x00000002;
//internal const int EWX_FORCE = 0x00000004;
//internal const int EWX_POWEROFF = 0x00000008;
//internal 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。
private 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 = LookupPrivilegeValue(null, SE_SHUTDOWN_NAME, ref tp.Luid);
ok = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);
ok = ExitWindowsEx(flg, 0);
}

/// <summary>
/// 关机按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnShutDown_Click(object sender, EventArgs e)
{
DialogResult dr = MessageBox.Show(@"确定要关机吗？请保存信息后按'是'，不关机按'否'", "提示信息", MessageBoxButtons.YesNo, MessageBoxIcon.Information);
if (dr == DialogResult.Yes)
{
CommonClass.DoExitWin(CommonClass.EWX_SHUTDOWN);
}
}