c# - HKEY 到 Microsoft.Win32.RegistryKey 的转换

Question

我有一个使用 RegOpenKeyEx (WinApi) 开放的注册表 HKEY。现在我想将 HKEY 转换为对象 Microsoft.Win32.RegistryKey。这将允许我使用更方便的 .Net 操作来进一步处理此 key 。

您知道如何以可靠的方式为 C# .Net 2.0 而非更高版本完成此转换吗？

感谢您的帮助!

我尝试使用反射访问 RegistryKey.GetBaseKey(hKey) 以将 HKEY 转换为 RegistryKey 但失败了:

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

public enum RegWow64Options
{
    None = 0,
    KEY_WOW64_64KEY = 0x0100,
    KEY_WOW64_32KEY = 0x0200
}

public enum RegRights
{
    ReadKey = 131097,
    WriteKey = 131078
}

static void exampleTransformKeytoRegistryKey()
{
    IntPtr hKeyChild;
    IntPtr hKeyParent = getRegistryKeyHandle(Registry.LocalMachine);

    if (hKeyParent != IntPtr.Zero)
    {
        int result = RegOpenKeyEx(
            getRegistryKeyHandle(Registry.LocalMachine),
            @"SOFTWARE\Microsoft",
            0,
            ((int)RegRights.ReadKey) | ((int)RegWow64Options.KEY_WOW64_64KEY),
            out hKeyChild);

        if (result == 0)
        {
            // hKeyChild has been retrieved
            // now convert hKeyChild to RegistryKey keyChild

            Type keyType = typeof(RegistryKey);
            RegistryKey keyChild = (RegistryKey)keyType.InvokeMember(
                "GetBaseKey",
                System.Reflection.BindingFlags.InvokeMethod | System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Static,
                null,
                keyType,
                new object[] { hKeyChild });

            // work with keyChild...
        }
    }
}

static IntPtr getRegistryKeyHandle(RegistryKey registryKey)
{
    Type registryKeyType = typeof(RegistryKey);
    System.Reflection.FieldInfo fieldInfo =
        registryKeyType.GetField("hkey", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);

    SafeHandle handle = (SafeHandle)fieldInfo.GetValue(registryKey);
    IntPtr dangerousHandle = handle.DangerousGetHandle();
    return dangerousHandle;
}

更新:以下方法(在某种程度上)会起作用。请关注函数getKeyToRegistryKey。

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

public enum RegWow64Options
{
    None = 0,
    KEY_WOW64_64KEY = 0x0100,
    KEY_WOW64_32KEY = 0x0200
}

public enum RegRights
{
    ReadKey = 131097,
    WriteKey = 131078
}

static void exampleTransformKeytoRegistryKey2()
{
    IntPtr hKeyChild;
    IntPtr hKeyParent = getRegistryKeyHandle(Registry.LocalMachine);

    if (hKeyParent != IntPtr.Zero)
    {
        int result = RegOpenKeyEx(
            getRegistryKeyHandle(Registry.LocalMachine),
            @"SOFTWARE\Microsoft",
            0,
            ((int)RegRights.ReadKey) | ((int)RegWow64Options.KEY_WOW64_32KEY),
            out hKeyChild);

        if (result == 0)
        {
            // hKeyChild has been retrieved
            // now convert hKeyChild to RegistryKey keyChild
            RegistryKey keyChild = getKeyToRegistryKey(hKeyChild, false, true);

            // work with keyChild...
        }
    }
}

static RegistryKey getKeyToRegistryKey(IntPtr hKey, bool writable, bool ownsHandle)
{
    //Get the BindingFlags for private contructors
    System.Reflection.BindingFlags privateConstructors = System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic;
    //Get the Type for the SafeRegistryHandle
    Type safeRegistryHandleType = typeof(Microsoft.Win32.SafeHandles.SafeHandleZeroOrMinusOneIsInvalid).Assembly.GetType("Microsoft.Win32.SafeHandles.SafeRegistryHandle");
    //Get the array of types matching the args of the ctor we want
    Type[] safeRegistryHandleCtorTypes = new Type[] { typeof(IntPtr), typeof(bool) };
    //Get the constructorinfo for our object
    System.Reflection.ConstructorInfo safeRegistryHandleCtorInfo = safeRegistryHandleType.GetConstructor(
            privateConstructors, null, safeRegistryHandleCtorTypes, null);
    //Invoke the constructor, getting us a SafeRegistryHandle
    Object safeHandle = safeRegistryHandleCtorInfo.Invoke(new Object[] { hKey, ownsHandle });

    //Get the type of a RegistryKey
    Type registryKeyType = typeof(RegistryKey);
    //Get the array of types matching the args of the ctor we want
    Type[] registryKeyConstructorTypes = new Type[] { safeRegistryHandleType, typeof(bool) };
    //Get the constructorinfo for our object
    System.Reflection.ConstructorInfo registryKeyCtorInfo = registryKeyType.GetConstructor(
        privateConstructors, null, registryKeyConstructorTypes, null);
    //Invoke the constructor, getting us a RegistryKey
    RegistryKey resultKey = (RegistryKey)registryKeyCtorInfo.Invoke(new Object[] { safeHandle, writable });
    //return the resulting key
    return resultKey;
}

static IntPtr getRegistryKeyHandle(RegistryKey registryKey)
{
    Type registryKeyType = typeof(RegistryKey);
    System.Reflection.FieldInfo fieldInfo =
    registryKeyType.GetField("hkey", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);

    SafeHandle handle = (SafeHandle)fieldInfo.GetValue(registryKey);
    IntPtr dangerousHandle = handle.DangerousGetHandle();
    return dangerousHandle;
}

这种方法的问题在于它只能在纯 .Net 2.0 应用程序中工作。如果您在 .Net 2.0 DLL 中使用代码并尝试从 .Net 4.0 应用程序中使用它，代码将失败。因此，我仍然希望找到另一种适用于混合环境的解决方案。

Answer 1

使用 RegistryKey.FromHandle(new SafeRegistryHandle(handle,true));