CODEWITHSUNDEEP
c#windowsregistry
Ahsan
Ahsan

Reputation: 2982

How to write to HKLM without WOW redirection in WOW scenario?

I have a WOW scenario and want to change the value of Key at

HKLM\Software\Microsoft\ABCD\

I am using this code :

String key = @"SOFTWARE\Microsoft\ABCD\";
RegistryKey reg64key = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64);
RegistryKey reg_64bit_Name = reg64key.OpenSubKey(key);
reg_64bit_Name.SetValue("Name","ahsan");

However this is not working. Can anyone kindly suggest what I need to do here ?

NB: 1. Not working means I am getting the following exception while running the app :

System.NullReferenceException: Object reference not set to an instance of an object.

Upvotes: 0

Views: 105

Answers (1)

Nico
Nico

Reputation: 12683

Firstly, by "this is not working" can you please describe any error messages, exceptions compiler errors?

That being said your code has 

reg64key.SetValue("Key","ahsan");

Where you will see you are using the "Key" (as a string). Trying changing this to.

reg64key.SetValue(key,"ahsan");

So you are using your variable instead of the string "Key"

EDIT: After OP changed

After your edits I went back and tried this for myself. Please see the code below (this is tested)

RegistryKey reg64key = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64);
String key = @"SOFTWARE\Microsoft\ABCD";

if (reg64key == null)
    throw new Exception("reg64key");

var basekey = reg64key.OpenSubKey(key);
if (basekey == null)
    basekey = reg64key.CreateSubKey(key);

basekey.SetValue("Name", "ahsan");

You will see from the code the first thing we do is grab the reg64key for HKLM. Next we check that the reg64key is not null (shouldnt be null but you never know). Next we use the reg64key to open the key "SOFTWARE\Microsoft\ABCD". If this is not found (baseKey == null) then we create the key.

Finally you can set the key as you wish.

Hope this help.s

Upvotes: 1

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