internal BatteryState()
{
SafeNativeMethods.SystemBatteryState battState = Power.GetSystemBatteryState();
_acOnline = battState.AcOnLine;
_maxCharge = (int)battState.MaxCapacity;
_currentCharge = (int)battState.RemainingCapacity;
_dischargeRate = (int)battState.Rate;
long _estimatedTime = (long)battState.EstimatedTime;
int _minutes = (int)(_estimatedTime / 60);
int _seconds = (int)(_estimatedTime % 60);
_estimatedTimeRemaining = new TimeSpan(0, _minutes, _seconds);
_suggestedCriticalBatteryCharge = (int)battState.DefaultAlert1;
_suggestedBatteryWarningCharge = (int)battState.DefaultAlert2;
}
internal static SafeNativeMethods.SystemBatteryState GetSystemBatteryState()
{
IntPtr status = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(SafeNativeMethods.SystemBatteryState)));
uint retval = NativeMethods.CallNtPowerInformation(
5, // SystemBatteryState
(IntPtr)null,
0,
status,
(UInt32)Marshal.SizeOf(typeof(SafeNativeMethods.SystemBatteryState))
);
if (retval == SafeNativeMethods.STATUS_ACCESS_DENIED)
{
throw new UnauthorizedAccessException("The caller had insufficient access rights to get the system battery state.");
}
SafeNativeMethods.SystemBatteryState batt_status = (SafeNativeMethods.SystemBatteryState)Marshal.PtrToStructure(status, typeof(SafeNativeMethods.SystemBatteryState));
Marshal.FreeCoTaskMem(status);
return(batt_status);
}
