Check installed app path in reg

Question

I was reading this post here: Check if application is installed in registry

I really like the example by: Mroczny Arturek, however I can't seem to figure out the best way to also implement into this code to also return the applications installation path.

public enum ProgramVersion
{
    x86,
    x64
}

private static IEnumerable<string> GetRegisterSubkeys(RegistryKey registryKey)
{
    return registryKey.GetSubKeyNames()
            .Select(registryKey.OpenSubKey)
            .Select(subkey => subkey.GetValue("DisplayName") as string)
}

private static bool CheckNode(RegistryKey registryKey, string applicationName, ProgramVersion? programVersion)
{
    return GetRegisterSubkeys(registryKey).Any(displayName => displayName != null
                                                              && displayName.Contains(applicationName)
                                                              && displayName.Contains(programVersion.ToString()));
}

private static bool CheckApplication(string registryKey, string applicationName, ProgramVersion? programVersion)
{
    RegistryKey key = Registry.LocalMachine.OpenSubKey(registryKey);

    if (key != null)
    {
        if (CheckNode(key, applicationName, programVersion))
            return true;

        key.Close();
    }

    return false;
}

public static bool IsSoftwareInstalled(string applicationName, ProgramVersion? programVersion)
{
    string[] registryKey = new[] {
    @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall",
    @"SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall"
};

    return registryKey.Any(key => CheckApplication(key, applicationName, programVersion));
}

How would you recommend doing it?

.Select(subkey => subkey.GetValue("InstallLocation") as string);

@Halonic Stellan lindall also has a great example, but is there a way to implement the return path of the install location? — Burgo855, Jun 12 '18 at 12:13

score 0 · Accepted Answer · answered Jun 13 '18 at 03:11

public enum ProgramVersion
{
    x86,
    x64
}

private static IEnumerable<string> GetRegisterSubkeys(RegistryKey registryKey)
{
    return registryKey.GetSubKeyNames()
            .Select(registryKey.OpenSubKey)
            .Select(subkey => subkey.GetValue("DisplayName") as string);
}

private static bool CheckNode(RegistryKey registryKey, string applicationName, ProgramVersion? programVersion)
{
    return GetRegisterSubkeys(registryKey).Any(displayName => displayName != null
                                                              && displayName.Contains(applicationName)
                                                              && displayName.Contains(programVersion.ToString()));
}

private static bool CheckApplication(string registryKey, string applicationName, ProgramVersion? programVersion)
{
    RegistryKey key = Registry.LocalMachine.OpenSubKey(registryKey);

    if (key != null)
    {
        if (CheckNode(key, applicationName, programVersion))
            return true;

        key.Close();
    }

    return false;
}

public static bool IsSoftwareInstalled(string applicationName, ProgramVersion? programVersion)
{
    string[] registryKey = new[] {
    @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall",
    @"SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall"
};

    return registryKey.Any(key => CheckApplication(key, applicationName, programVersion));
}



private void button1_Click(object sender, EventArgs e)
{
    if (IsSoftwareInstalled("Type Program EXE Name HERE Without Using .exe", null))
    {
        var key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall") ??
          Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall");


        if (key == null)
        {
            return;
        }
        else
        {
            foreach (string subkey_name in key.GetSubKeyNames())
            {
                //MessageBox.Show(subkey_name); //Commented this out, i use this to iterate through and show me the install folder names.
                using (RegistryKey subkey = key.OpenSubKey(subkey_name))
                {
                    if (!object.ReferenceEquals(subkey.GetValue("DisplayName"), null))
                    {
                        string[] str = subkey.GetValueNames();
                        string SoftNames = Convert.ToString(subkey.GetValue("DisplayName"));
                        if (SoftNames == "Type HERE the DisPlayName")
                        {
                            string InstallLoc = Convert.ToString(subkey.GetValue("InstallLocation"));
                            //Strip the "double quotes"
                            string stripped = InstallLoc.Replace("\"", "");


                            MessageBox.Show(stripped + @"\Program.exe");
                        }
                    }
                }
            }
        }
    }
    else
    {
        MessageBox.Show("Program not installed");
    }
}

This checks if 64/32 in registry for installed program, if the program is installed it will return the desired exe path.

Check installed app path in reg

1 Answers1