Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Returns NULL ... RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\MyCompany");

Posted on 2008-06-12
4
Medium Priority
?
3,461 Views
Last Modified: 2013-11-29
hello,

I am having a problem reading the registry. The following line returns NULL.
RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\MyCompany");

Windows XP 64 bit
IIS running 32bit .NET framework and IIS enabled to run 32 bit apps.

Key was created manually using regedit.

I am administrator on this machine.

Any ideas? thanks

BTW, this works
RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE");
0
Comment
Question by:Valimai
  • 2
4 Comments
 
LVL 3

Expert Comment

by:aphillips
ID: 21775147
This is a real mystery. It's not a privilege problem as SecurityException would be thrown.

Do other sub-keys work?

  RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft");

Have you tried?

  RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE");
  RegistryKey key2 = key.OpenSubKey(@"MyCompany");
0
 
LVL 1

Author Comment

by:Valimai
ID: 21789809
Yes, I tried the SOFTWARE key only and it returned a result. Any sub folder created cannot be read.

We have since decided that the machine has a problem and will re-install the OS.

If you do not mind, I will ask that this question be deleted.
0
 
LVL 41

Accepted Solution

by:
graye earned 2000 total points
ID: 21793114
I wouldn't make that assumption!

The 64-bit version of Windows has a Virtual Registry to maintain backwards compatibility with 32-bit apps.   So, in your case, there are actually two views in the registry with same name.  The 64-bit view is available from inside a 64-bit application, and the 32-bit view is available from inside 32-bit applications.

However,  the .Net Framework does not support the ability to switch to the other "view"... so to see the "other" (32bit from 64bit app, or 64 bit from 32bit app) view, you'd have to use the low-level APIs.   There is an unfinished project out on CodePlex that is designed to be drop-in replacement for the .Net Framework's Registry class that provides this missing feature.

http://www.codeplex.com/Registry64bit
0
 
LVL 1

Author Closing Comment

by:Valimai
ID: 31466787
We have re-installed the machine to 32bit. Your explaination sounds plausable.
0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In the absence of a fully-fledged GPO Management product like AGPM, the script in this article will provide you with a simple way to watch the domain (or a select OU) for GPOs changes and automatically take backups when policies are added, removed o…
This article is about my experience upgrading my consulting machine to Windows 10 Version 1709 (The Fall 2017 Creator Update)
Windows 8 came with a dramatically different user interface known as Metro. Notably missing from that interface was a Start button and Start Menu. Microsoft responded to negative user feedback of the Metro interface, bringing back the Start button a…
The Task Scheduler is a powerful tool that is built into Windows. It allows you to schedule tasks (actions) on a recurring basis, such as hourly, daily, weekly, monthly, at log on, at startup, on idle, etc. This video Micro Tutorial is a brief intro…

885 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question