Question

我正在编写需要检查程序是否已安装的代码，如果是，请获取路径。路径存储在HKEY_LOCAL_MACHINE\SOFTWARE\Some\Registry\Path\InstallLocation或HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Some\Registry\Path\InstallLocation中，具体取决于是否安装了所述程序的32位或64位版本。

在64位计算机上运行时，我现在的代码无法找到32位安装的路径：

        const string topKeyPath = @"HKEY_LOCAL_MACHINE\SOFTWARE";
        const string subLocationPath = @"Some\Registry\Path\InstallLocation";

        object pathObj = Registry.GetValue(topKeyPath + @"\" + subLocationPath, null, null);

        if (pathObj == null) // if 32-bit isn't installed, try to find 64-bit
        {
            try
            {
                RegistryKey view32 = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32);
                view32 = view32.OpenSubKey("SOFTWARE");
                view32 = view32.OpenSubKey(subLocationPath);

                pathObj = view32.OpenSubKey(subLocationPath, false).GetValue(null);

                if (pathObj == null)
                {
                    throw new InvalidOperationException("Not installed.");
                }
            }
            catch (Exception e)
            {
                throw new InvalidOperationException("Not installed.", e);
            }
        }

        string installPath = Convert.ToString(pathObj);

Answer 1

我通过将我的代码重构为更清晰，更符合逻辑的东西来解决这个问题。

        string installPath = GetInstallLocation(RegistryView.Default); // try matching architecture

        if (installPath == null)
        {
            installPath = GetInstallLocation(RegistryView.Registry64); // explicitly try for 64-bit
        }

        if (installPath == null)
        {
            installPath = GetInstallLocation(RegistryView.Registry32); // explicitly try for 32-bit
        }

        if (installPath == null) // must not be installed
        {
            throw new InvalidOperationException("Program is not instlaled.");
        }

    public static string GetInstallLocation(RegistryView flavor)
    {

        const string subLocationPath = @"SOFTWARE\Microsoft\Some\Registry\Path\InstallLocation";
        object pathObj;

        try
        {
            RegistryKey view32 = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, flavor);
            view32 = view32.OpenSubKey(subLocationPath);

            pathObj = view32.GetValue(null);

            return pathObj != null ? Convert.ToString(pathObj) : null;
        }
        catch (Exception)
        {
            return null;
        }
    }

从x64应用程序检查32位和64位注册表中的值？

1 个答案: