C#•6mo ago

Trouble reading registry

  string value64 = string.Empty;
  string value32 = string.Empty;

  const string subkey = @"Test";
  const string valueName = "Testvalue";

  RegistryKey localKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64);
  localKey = localKey.OpenSubKey(subkey);
  if (localKey != null)
  {
      value64 = localKey.GetValue(valueName).ToString();
      MessageBox.Show(value64);

  }
  RegistryKey localKey32 = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32);
  localKey32 = localKey32.OpenSubKey(subkey);
  if (localKey32 != null)
  {
      value32 = localKey32.GetValue(valueName).ToString();
      MessageBox.Show(value32);

  }

  string value64 = string.Empty;
  string value32 = string.Empty;

  const string subkey = @"Test";
  const string valueName = "Testvalue";

  RegistryKey localKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64);
  localKey = localKey.OpenSubKey(subkey);
  if (localKey != null)
  {
      value64 = localKey.GetValue(valueName).ToString();
      MessageBox.Show(value64);

  }
  RegistryKey localKey32 = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32);
  localKey32 = localKey32.OpenSubKey(subkey);
  if (localKey32 != null)
  {
      value32 = localKey32.GetValue(valueName).ToString();
      MessageBox.Show(value32);

  }

I'm in a lot of trouble to read a single value from the registry i've tried various codes snippets but everytime my code just doesnt find the key

26 Replies

Remaetanju•6mo ago

I just spent approximately 18h on this problem id like to understand

jcotton42•6mo ago

the key is at HKLM\Test?

Remaetanju•6mo ago

the full path where my key is look likes HKEY_CURRENT_USER\\System\\GameConfigStore\\Children\\a31f8397-8996-4a7b-8cb9-8cd47c890c54\\ The value i want is named MatchedExeFullPath

jcotton42•6mo ago

well, that's not at all what the code you've pasted is looking for it's looking for HKLM\Test

Remaetanju•6mo ago

both of them wont be present on a helper's computer

jcotton42•6mo ago

in any case, what is that key for? might be random per machine since it's a GUID

Remaetanju•6mo ago

its a application path i know its random, but anyway that not THIS specific key that i need but a way to read 1 registry entry but if you want the whole story im trying to get a steam game's root folder from registry

jcotton42•6mo ago

https://github.com/KSP-CKAN/CKAN/blob/master/Core/Games/KerbalSpaceProgram.cs#L32 this is how CKAN does it

GitHub

CKAN/Core/Games/KerbalSpaceProgram.cs at master · KSP-CKAN/CKAN

The Comprehensive Kerbal Archive Network. Contribute to KSP-CKAN/CKAN development by creating an account on GitHub.

jcotton42•6mo ago

seems to look for the Steam install, from there finds the steam game folders from config.vdf, then looks in those for KSP

Remaetanju•6mo ago

ok i've made a bit of a progress im gonna continue coding and show you how it gets thanks ❤️ first problem i see it doesnt detect game if its installed on another disk than steam

jcotton42•6mo ago

it should at looks at all the BaseInstallFolder values which I'm pretty sure is all your steam libraries

Remaetanju•6mo ago

im looking at it from your link line 35 it get steam install path to steamPath variable then uses KSPDirectory line 43 to combine which i guess to be root install folder of steam + steamapps common and the game name

jcotton42•6mo ago

you appear to have skipped the entire bit of code that runs if it fails to find it in the default library

Remaetanju•6mo ago

starting at line 50?

jcotton42•6mo ago

yes

Remaetanju•6mo ago

i got it i should see every BaseInstallFolder when i'm into the if at line 59 ?

jcotton42•6mo ago

seems like it

Remaetanju•6mo ago

mmmh i may be really dumb i've opened the config.vdf it reads and it doesnt seems to have my libraryfolder (at least in clear text) but i know there is the library.vdf file that might come handy (its been years since i modded ksp, but i had a mere souvenirs of it not find ksp if not on the same disk) y i confirm in my steam/config/config.vds i dont have the path

jcotton42•6mo ago

are you looking for the library path or the game path?

Remaetanju•6mo ago

the gamepath but i dont understand how ckan reconstruct the game path using config.vdf (for me it seems that all the usefull information it should be using are in config.vdf)

jcotton42•6mo ago

lemme check on my steam deck actually well that's not what the code is doing it's looking for library paths, then inside those libraries looking for the game

Remaetanju•6mo ago

if (line.Contains("BaseInstallFolder")) this line nevers trigger for me i opened the file line 50

 // Attempt to find through config file
            string configPath = Path.Combine(steamPath, "config", "config.vdf");

 // Attempt to find through config file
            string configPath = Path.Combine(steamPath, "config", "config.vdf");

i should be able to find "BaseInstallFolder" when opening the file right ?

jcotton42•6mo ago

oh hm does seem to be in libraryfolders.vdf idk what's up with ckan then

Remaetanju•6mo ago

i thought i was crazy x) but i think i have everything i need i'll post my code soon 🙂

Mayor McCheese•6mo ago

Didn't @🅱ango have some project a while back with steam and install paths and such?

Remaetanju•6mo ago

here's what i've came up with:

private static string[] SteamPaths
    => new string[]
    {
        Microsoft.Win32.Registry.GetValue(steamRegKey, steamRegValue, null) as string,
    };


static string GamePath()
{
    // Attempt to get the Steam path.
    string? steamPath = null;

    foreach (var steam in SteamPaths.Where(p => !string.IsNullOrEmpty(p)))
        if (Directory.Exists(steam))
            steamPath = steam;

    if (steamPath == null)
        return null;

    // find game folder through library file
    string librarypath = Path.Combine(steamPath, "config", "libraryfolders.vdf");

    if (File.Exists(librarypath))
    {
        var stream = File.OpenRead(librarypath);
        var kv = KVSerializer.Create(KVSerializationFormat.KeyValues1Text);
        KVObject data = kv.Deserialize(stream);

        int i = 0;
        while (i < data.Count())
        {
            var libraryfolder = data[i.ToString()]["path"];
            var librarygames = data[i.ToString()]["apps"];

            foreach (var game in (IEnumerable<KVObject>)librarygames)
                if (game.Name.Contains(appID))
                    return libraryfolder.ToString() + "\\steamapps\\common\\Lethal Company";
            i++;
        }
    }

private static string[] SteamPaths
    => new string[]
    {
        Microsoft.Win32.Registry.GetValue(steamRegKey, steamRegValue, null) as string,
    };


static string GamePath()
{
    // Attempt to get the Steam path.
    string? steamPath = null;

    foreach (var steam in SteamPaths.Where(p => !string.IsNullOrEmpty(p)))
        if (Directory.Exists(steam))
            steamPath = steam;

    if (steamPath == null)
        return null;

    // find game folder through library file
    string librarypath = Path.Combine(steamPath, "config", "libraryfolders.vdf");

    if (File.Exists(librarypath))
    {
        var stream = File.OpenRead(librarypath);
        var kv = KVSerializer.Create(KVSerializationFormat.KeyValues1Text);
        KVObject data = kv.Deserialize(stream);

        int i = 0;
        while (i < data.Count())
        {
            var libraryfolder = data[i.ToString()]["path"];
            var librarygames = data[i.ToString()]["apps"];

            foreach (var game in (IEnumerable<KVObject>)librarygames)
                if (game.Name.Contains(appID))
                    return libraryfolder.ToString() + "\\steamapps\\common\\Lethal Company";
            i++;
        }
    }

works like a charm thanks again ❤️

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Trouble reading registry