Question

我一直在使用安装程序包并使用RegistryKey.OpenBaseKey来处理自定义操作，这些操作可以打开和添加/删除64位注册表或32位注册表中的密钥。 MSI包，但这需要我在运行我的安装程序之前使用引导程序或其他东西在目标计算机上安装.NET Framework 4，因为 OpenBaseKey 仅在.NET Framework 4中引入。理想情况下，我想要只针对.NET Framework 3.5，并且仍然能够修改像 OpenBaseKey 中的64位或32位注册表配置单元;那么我不需要.NET 4和安装它的开销。

对于那些不想让.NET 4成为先决条件的人来说， OpenBaseKey 还有其他选择吗？可能是像P /调用某种WinAPI方法这样的东西吗？我不确定它会采取什么措施。

Answer 1

对于那些对某些早期.NET版本的C＃解决方案感兴趣的人，为了不必重构过多的代码，它不是很漂亮，但在这里它是完全可行的使用反射。我在XSharper source code中找到了这个技巧。

public static class RegistryExtensions
{

    public enum RegistryHiveType
    {
        X86,
        X64
    }

    static Dictionary<RegistryHive, UIntPtr> _hiveKeys = new Dictionary<RegistryHive, UIntPtr> {
        { RegistryHive.ClassesRoot, new UIntPtr(0x80000000u) },
        { RegistryHive.CurrentConfig, new UIntPtr(0x80000005u) },
        { RegistryHive.CurrentUser, new UIntPtr(0x80000001u) },
        { RegistryHive.DynData, new UIntPtr(0x80000006u) },
        { RegistryHive.LocalMachine, new UIntPtr(0x80000002u) },
        { RegistryHive.PerformanceData, new UIntPtr(0x80000004u) },
        { RegistryHive.Users, new UIntPtr(0x80000003u) }
    };

    static Dictionary<RegistryHiveType, RegistryAccessMask> _accessMasks = new Dictionary<RegistryHiveType, RegistryAccessMask> {
        { RegistryHiveType.X64, RegistryAccessMask.Wow6464 },
        { RegistryHiveType.X86, RegistryAccessMask.WoW6432 }
    };

    [Flags]
    public enum RegistryAccessMask
    {
        QueryValue          = 0x0001,
        SetValue            = 0x0002,
        CreateSubKey        = 0x0004,
        EnumerateSubKeys    = 0x0008,
        Notify              = 0x0010,
        CreateLink          = 0x0020,
        WoW6432             = 0x0200,
        Wow6464             = 0x0100,
        Write               = 0x20006,
        Read                = 0x20019,
        Execute             = 0x20019,
        AllAccess           = 0xF003F
    }

    [DllImport("advapi32.dll", CharSet = CharSet.Auto)]
    public static extern int RegOpenKeyEx(
      UIntPtr hKey,
      string subKey,
      uint ulOptions,
      uint samDesired,
      out IntPtr hkResult);

    public static RegistryKey OpenBaseKey(RegistryHive registryHive, RegistryHiveType registryType)
    {
        UIntPtr hiveKey = _hiveKeys[registryHive];
        if (Environment.OSVersion.Platform == PlatformID.Win32NT && Environment.OSVersion.Version.Major > 5)
        {
            RegistryAccessMask flags = RegistryAccessMask.QueryValue | RegistryAccessMask.EnumerateSubKeys | RegistryAccessMask.SetValue | RegistryAccessMask.CreateSubKey | _accessMasks[registryType];
            IntPtr keyHandlePointer = IntPtr.Zero;
            int result = RegOpenKeyEx(hiveKey, String.Empty, 0, (uint)flags, out keyHandlePointer);
            if (result == 0)
            {
                var safeRegistryHandleType = typeof(SafeHandleZeroOrMinusOneIsInvalid).Assembly.GetType("Microsoft.Win32.SafeHandles.SafeRegistryHandle");
                var safeRegistryHandleConstructor = safeRegistryHandleType.GetConstructor(BindingFlags.Instance | BindingFlags.NonPublic, null, new[] { typeof(IntPtr), typeof(bool) }, null); // .NET < 4
                if (safeRegistryHandleConstructor == null)
                    safeRegistryHandleConstructor = safeRegistryHandleType.GetConstructor(BindingFlags.Instance | BindingFlags.Public, null, new[] { typeof(IntPtr), typeof(bool) }, null); // .NET >= 4
                var keyHandle = safeRegistryHandleConstructor.Invoke(new object[] { keyHandlePointer, true });
                var net3Constructor = typeof(RegistryKey).GetConstructor(BindingFlags.Instance | BindingFlags.NonPublic, null, new[] { safeRegistryHandleType, typeof(bool) }, null);
                var net4Constructor = typeof(RegistryKey).GetConstructor(BindingFlags.Instance | BindingFlags.NonPublic, null, new[] { typeof(IntPtr), typeof(bool), typeof(bool), typeof(bool), typeof(bool) }, null);
                object key;
                if (net4Constructor != null)
                    key = net4Constructor.Invoke(new object[] { keyHandlePointer, true, false, false, hiveKey == _hiveKeys[RegistryHive.PerformanceData] });
                else if (net3Constructor != null)
                    key = net3Constructor.Invoke(new object[] { keyHandle, true });
                else
                {
                    var keyFromHandleMethod = typeof(RegistryKey).GetMethod("FromHandle", BindingFlags.Static | BindingFlags.Public, null, new[] { safeRegistryHandleType }, null);
                    key = keyFromHandleMethod.Invoke(null, new object[] { keyHandle });
                }
                var field = typeof(RegistryKey).GetField("keyName", BindingFlags.Instance | BindingFlags.NonPublic);
                if (field != null)
                    field.SetValue(key, String.Empty);
                return (RegistryKey)key;
            }
            else if (result == 2) // The key does not exist.
                return null;
            throw new Win32Exception(result);
        }
        throw new PlatformNotSupportedException("The platform or operating system must be Windows XP or later.");
    }
}

使用示例：

var key64 = RegistryExtensions.OpenBaseKey(RegistryHive.LocalMachine, RegistryExtensions.RegistryHiveType.X64);
var key32 = RegistryExtensions.OpenBaseKey(RegistryHive.LocalMachine, RegistryExtensions.RegistryHiveType.X86);

Answer 2

对于早于版本4的.NET版本，没有框架API允许访问备用注册表视图。要访问备用视图，您必须根据需要调用本地API RegOpenKeyEx传递KEY_WOW64_32KEY或KEY_WOW64_64KEY标记之一。

执行此操作的常用方法是使用C ++ / CLI混合模式程序集，或使用P/Invoke。但是，这根本不是很有趣。注册表API使用起来比较笨拙，因为它们支持多种数据类型的值。

Answer 3

定位所需的注册表：

RegistryKey localMachine = Registry.LocalMachine; //For example

并获得所需的值：

RegistryKey lKey = localMachine.OpenSubKey(@"SOFTWARE\...\", false);

.NET 3.5中的RegistryKey.OpenBaseKey有哪些替代方案？

3 个答案: