what's wrong here with this code?

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hi everybody

I'm new to registry programming with c#
I have a code, this has not any error but it's not working!

I want to disable Hibernate on windows 8.1 Pro N

what's wrong here?

C#

private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                RegistryKey mykey = Registry.LocalMachine.OpenSubKey("SYSTEM\\CurrentControlSet\\Control\\Power", true);
                mykey.SetValue("HibernateEnabled", 0);
                mykey.Close();

            }
            catch { }
        }

thanks a lot :)

Posted 9-Oct-15 1:21am

amir.nazarizadeh

Updated 9-Oct-15 1:22am

v2

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CHill60 9-Oct-15 7:34am

"not working" is not helpful. What happens when you run it?
Try putting something in the catch statement rather than just invisibly swallowing exceptions.

Are you running this code with Admin rights?
Does that registry key exist in the 32-bit registry hive?
Which version of .NET are you running with (it could affect the solution)

amir.nazarizadeh 9-Oct-15 7:41am

thanks for your answer
it's run but can not change the value from 1 to 0 !!!

CHill60 9-Oct-15 7:44am

If you've put something in the catch statement are you getting an error reported?
Put a breakpoint on mykey.SetValue - check the value of mykey, is it null?

amir.nazarizadeh 9-Oct-15 7:51am

it says requested registry not allowed

i think I should open this with admin permission but I don't know how to do that!

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OriginalGriff · Accepted Answer · 2015-10-09T01:49:00

The chances are that you need admin permission to change the SYSTEM area of the registry and your modification is being rejected as a result.

This is a good example of why swallowing exceptions is a bad idea: you have no idea there is a problem, or any details about it, just that the code doesn't work.

Change your catch:

C#

catch (Exception ex)
   {
   Debug.WriteLine(ex.Message);
   }

And it will tell you what the problem is.

Almost certainly, it's an authorization problem. This may be a better way to do it: https://social.msdn.microsoft.com/Forums/vstudio/en-US/386e0268-8986-4e49-8023-f9ae2e2689ab/disabling-hibernation?forum=csharpgeneral[^]