Question

how can I turn off ‘allow hybrid sleep’ in advanced power setting? by c#
by manually: power options -> change Plan Settings -> change advanced power setting->
Sleep-> ‘Allow hybrid sleep’ -> plugged in: OFF

Answer 1

If you are targeting Windows 7/2008 Server then you can use WMI and the Win32_PowerSetting class. Below is code that does that. Make sure to add an assembly reference and using directive to System.Management.

    private bool SetAllowHybridSleep(bool enabled)
    {
        //Machine to work on, "." for local
        string RemotePC = ".";

        //Set the namespace to the power namespace, used throughout the function
        ManagementScope ms = new ManagementScope(@"\\" + RemotePC + @"\root\cimv2\power");

        //Will hold each of our queries
        ObjectQuery oq = null;

        //Will hold the values of our power plan and the specific setting that we want to change
        Guid PowerPlanInstanceId = Guid.Empty;
        string PowerSettingInstanceId = null;

        //Look for the specific setting that we want
        oq = new ObjectQuery(string.Format("SELECT * FROM Win32_PowerSetting WHERE ElementName = 'Allow hybrid sleep'"));
        using (ManagementObjectSearcher mos = new ManagementObjectSearcher(ms, oq))
        {
            ManagementObjectCollection results = mos.Get();
            foreach (ManagementObject obj in results)
            {
                foreach (PropertyData p in obj.Properties)
                {
                    if (p.Name == "InstanceID")
                    {
                        //This will give us a string with a GUID specific to our setting
                        PowerSettingInstanceId = p.Value.ToString();
                        break;
                    }
                }
            }
        }

        //Sanity check
        if (string.IsNullOrEmpty(PowerSettingInstanceId))
        {
            Console.WriteLine("System does not support hybrid sleep");
            return false;
        }

        //Look for the active power scheme
        oq = new ObjectQuery("SELECT * FROM Win32_PowerPlan WHERE IsActive=True");
        using (ManagementObjectSearcher mos = new ManagementObjectSearcher(ms, oq))
        {
            ManagementObjectCollection results = mos.Get();
            foreach (ManagementObject obj in results)
            {
                foreach (PropertyData p in obj.Properties)
                {
                    if (p.Name == "InstanceID")
                    {
                        //The instance contains a string with a GUID inside of it, use the code below to get the GUID by itself
                        if (!Guid.TryParse(System.Text.RegularExpressions.Regex.Match(p.Value.ToString(), @"\{[0-9a-f]{8}\-[0-9a-f]{4}\-[0-9a-f]{4}\-[0-9a-f]{4}\-[0-9a-f]{12}\}").Value, out PowerPlanInstanceId))
                        {
                            Console.WriteLine("Could not find active power plan");
                            return false;
                        }
                        break;
                    }
                }
            }
        }

        //Now we need to update the actual power setting in the active plan
        //Get all power schemes for the target setting
        oq = new ObjectQuery(string.Format("ASSOCIATORS OF {{Win32_PowerSetting.InstanceID=\"{0}\"}} WHERE ResultClass = Win32_PowerSettingDataIndex", PowerSettingInstanceId.Replace(@"\", @"\\")));
        using (ManagementObjectSearcher mos = new ManagementObjectSearcher(ms, oq))
        {
            ManagementObjectCollection results = mos.Get();
            foreach (ManagementObject obj in results)
            {
                foreach (PropertyData p in obj.Properties)
                {
                    //See if the current scheme is the current setting. This will happen twice, once for AC and once for DC
                    if (p.Name == "InstanceID" && p.Value.ToString().Contains(PowerPlanInstanceId.ToString()))
                    {
                        //Change the value of the current setting
                        obj.SetPropertyValue("SettingIndexValue", (enabled ? "1" : "0"));
                        obj.Put();
                        break;
                    }
                }
            }
        }

        return true;
    }