C# Cannot get subkeynames

Question

I am making a concept of registry viewer that gets all the names
of the subkey in the registry and lists all the names in the console. and on the
string[] subKeyNames = jdfddnjdz.GetSubKeyNames();
i get an error which is Object reference not set to an instance of an object.

here's the code.

RegistryKey jdfddnjdz = Registry.CurrentUser.OpenSubKey(@"\SOFTWARE\Example\");
string[] subKeyNames = jdfddnjdz.GetSubKeyNames();
foreach (String val5 in subKeyNames)
{
    Console.WriteLine(val5);
    Console.ReadKey();
}

Edit:
This code works fine but if I add .OpenSubKey like in the code above this it gives an error.

RegistryKey subKey = Registry.CurrentUser;
string[] subkeyNemez = subKey.GetSubKeyNames();
foreach (String valuef in subkeyNemez)
{
    Console.WriteLine(valuef);
    Console.ReadKey();
}

That horribly named variable is null. Project > Properties > Build tab, untick the "Prefer 32-bit" checkbox. And add the null test. — Hans Passant, Mar 18 '18 at 13:03
`OpenSubKey` returns `null` when either the key does not exist or the application does not have access (not running as admin) — Camilo Terevinto, Mar 18 '18 at 13:03
Possible duplicate of [What is a NullReferenceException, and how do I fix it?](https://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it) — Camilo Terevinto, Mar 18 '18 at 13:03

score 0 · Answer 1 · answered Mar 18 '18 at 13:08

0

if (jdfddnjdz != null){
... your code
}

answered Mar 18 '18 at 13:08

Jamez Fatout

302
3
12

I need to get all the subkeys there. – CursedSheep Mar 18 '18 at 13:18

score 0 · Accepted Answer · answered Mar 22 '18 at 09:10

I finally solved it after a week! Just need to remove slash/Backslash on the "Software".

            RegistryKey jdfddnjdz = Registry.CurrentUser;
        jdfddnjdz = jdfddnjdz.OpenSubKey(@"Software\Microsoft");
        string[] dshg = jdfddnjdz.GetSubKeyNames();
        foreach(String umm in dshg)
        {
            Console.WriteLine(umm);
            break;
        }
        Console.ReadKey();

C# Cannot get subkeynames

2 Answers2