modifying the registry key value

Question

I have a registry path of the following

HKEY_LOCAL_MACHINE\SOFTWARE\COMPANY\COMPFOLDER

inside COMPFOLDER, I have a string value called "Deno" whose value is 0. I wish to change its value to 1 by code whenever I execute the code. Can anyone help me?

How did the value *get* in that registry key in the first place? I assume that you used the [`Microsoft.Win32.Registry`](http://msdn.microsoft.com/en-us/library/microsoft.win32.registry.aspx) class to write it, so you should use the same class to *modify* it. What problems did you have when you tried to do this? — Cody Gray - on strike, Jan 11 '12 at 08:21
I'd assume that he navigated to the registry, copied the path and is desirous of creating a program to make changes to it through code.. Just a guess but that's how I got here. I appreciate your answer Cody Gray. It answered my question in part. — iDevJunkie, Jan 15 '15 at 07:22
Use the Registry class as described here. http://msdn.microsoft.com/en-us/library/microsoft.win32.registry.aspx — agarcian, Jan 11 '12 at 08:23

Jontatas · Answer 1 · 2017-02-20T12:59:16.503

67

It's been a while I did reg hacks, but something like this could work:

RegistryKey myKey = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Company\\Compfolder", true);
if(myKey != null)    {
   myKey.SetValue("Deno", "1", RegistryValueKind.String);
   myKey.Close();
}

edited Feb 20 '17 at 12:59

answered Jan 11 '12 at 08:24

Jontatas

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`myKey` should be in a `using` statement. See the [remarks for `RegistryKey`](https://learn.microsoft.com/en-us/dotnet/api/microsoft.win32.registrykey?view=netframework-4.8#remarks) – Liam May 01 '19 at 12:34
1

Since the key I had to modify started with HKCU, I replaced "Registry.LocalMachine." with "Registry.CurrentUser." and it worked all right. Thank you! – MundoPeter Feb 12 '21 at 15:36

score 21 · Answer 2 · edited Apr 25 '21 at 06:14

21

using (RegistryKey key = regKeyRoot.OpenSubKey(KeyName, true)) // Must dispose key or use "using" keyword
{
    if (key != null)  // Must check for null key
    {
        key.SetValue(attribute, value);
    }
}

edited Apr 25 '21 at 06:14

Yoshi Askharoun

101
3
13

answered Jun 04 '14 at 07:35

electricalbah

2,227
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modifying the registry key value

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