private static List <SafeHeapHandle <Guid> > GetPowerSchemeGuids()
{
List <SafeHeapHandle <Guid> > result = new List <SafeHeapHandle <Guid> >();
IntPtr powerSchemeGuidBuffer;
int guidSize = Marshal.SizeOf(typeof(Guid));
int index = 0;
int returnCode = 0;
while (returnCode == 0)
{
powerSchemeGuidBuffer = Marshal.AllocHGlobal(guidSize);
returnCode = PowrProf.PowerEnumerate(IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, PowrProf.PowerDataAccessor.ACCESS_SCHEME, index, powerSchemeGuidBuffer, ref guidSize);
if (returnCode == 259)
{
break;
}
if (returnCode != 0)
{
throw new COMException("Error occurred while enumerating power schemes. Win32 error code: " + returnCode);
}
result.Add(new SafeHeapHandle <Guid>(powerSchemeGuidBuffer));
index++;
}
return(result);
}
private static string GetSchemeName(SafeHeapHandle <Guid> guid)
{
IntPtr schemeNameGuidPtr = guid.DangerousGetHandle();
int buffSize = 0;
if (PowrProf.PowerReadFriendlyName(IntPtr.Zero, schemeNameGuidPtr, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, ref buffSize) != ReturnCodes.ERROR_SUCCESS)
{
return(string.Empty);
}
if (buffSize == 0)
{
return(string.Empty);
}
IntPtr schemeNamePtr = Marshal.AllocHGlobal(buffSize);
if (PowrProf.PowerReadFriendlyName(IntPtr.Zero, schemeNameGuidPtr, IntPtr.Zero, IntPtr.Zero, schemeNamePtr, ref buffSize) != ReturnCodes.ERROR_SUCCESS)
{
Marshal.FreeHGlobal(schemeNamePtr);
return(string.Empty);
}
string schemeName = Marshal.PtrToStringUni(schemeNamePtr);
Marshal.FreeHGlobal(schemeNamePtr);
return(schemeName);
}
/// <summary>
/// コンピューターを強制的にシャットダウン・再起動・ログオフ・スタンバイ・休止状態にします。
/// </summary>
/// <param name="shutDownSwitch"></param>
public static void ShutDown(ShutDownSwitch shutDownSwitch)
{
if (Environment.OSVersion.Platform == PlatformID.Win32NT)
{
adjustToken();
}
EWX ewx = EWX.FORCE;
switch (shutDownSwitch)
{
case ShutDownSwitch.PowerOff:
ewx |= EWX.POWEROFF;
break;
case ShutDownSwitch.Reboot:
ewx |= EWX.REBOOT;
break;
case ShutDownSwitch.LogOff:
ewx |= EWX.LOGOFF;
break;
case ShutDownSwitch.StandBy:
case ShutDownSwitch.Hibernate:
bool hibernate = (shutDownSwitch == ShutDownSwitch.Hibernate);
PowrProf.SetSuspendState(hibernate, true, true);
return;
default:
throw new ArgumentException();
}
User32.ExitWindowsEx(ewx, 0);
}
private static bool Suspend(bool hibernate, bool wakeupEventsDisabled)
{
try
{
using (new PrivilegedCodeBlock(SystemPrivilege.Shutdown))
{
if (hibernate)
{
return(PowrProf.IsPwrHibernateAllowed() ? PowrProf.SetSuspendState(true, false, wakeupEventsDisabled) : false);
}
else
{
return(PowrProf.IsPwrSuspendAllowed() ? PowrProf.SetSuspendState(false, false, wakeupEventsDisabled) : false);
}
}
}
catch
{
return(false);
}
}
