c# - 在 C# 中查找和删除注册表项

Question

我正在寻找一个可以找到注册表项并将其删除的脚本。我的 key 是这样的:“{24EAA2C1-3EE7-40E0-AEA3-D20AA14A6005}”。这个 key 存储在很多地方:

HKEY_CLASSES_ROOT\CLSID\{MY_KEY}
HKEY_CLASSES_ROOT\Wow6432Node\CLSID\{MY_KEY}
HKEY_CURRENT_USER\Software\Classes\CLSID\{MY_KEY}
HKEY_CURRENT_USER\Software\Classes\Wow6432Node\CLSID\{MY_KEY}
HKEY_USERS\S-1-5-21-1786904987-2011555162-1551513139-1001\Software\Classes\CLSID\{MY_KEY}
HKEY_USERS\S-1-5-21-1786904987-2011555162-1551513139-1001\Software\Classes\Wow6432Node\CLSID\{KEY}
HKEY_USERS\S-1-5-21-1786904987-2011555162-1551513139-1001_Classes\CLSID\{MY_KEY}
HKEY_USERS\S-1-5-21-1786904987-2011555162-1551513139-1001_Classes\Wow6432Node\CLSID\{MY_KEY}

但这些位置可能会有所不同(这就是为什么我必须在删除它们之前找到它们的原因)。我想使用 C# 脚本(在控制台应用程序中)删除此键的每次出现

我试过这个:

static void Main(string[] args)
{
    DeleteKeyTest("{MY_KEY}");
}

private RegistryKey baseRegistryKey = Registry.ClassesRoot;
public void DeleteKeyTest(string KeyName)
{
    try
    {
        RegistryKey rk = baseRegistryKey;
        rk.DeleteSubKey(KeyName);       
    }
    catch (Exception e)
    {
    }
}

我得到一个错误:

Can not delete a subkey, because it does not exist.

编辑

这是我的代码，用于查找 key 的所有出现情况:

public List<string> SearchKey(string Key)
{
    List<string> ListKeys = getKeyPath(Key, RegistryKey.OpenBaseKey(RegistryHive.ClassesRoot, RegistryView.Registry64));
    ListKeys.AddRange(getKeyPath(Key, RegistryKey.OpenBaseKey(RegistryHive.CurrentUser, RegistryView.Registry64)));
    ListKeys.AddRange(getKeyPath(Key, RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64)));
    ListKeys.AddRange(getKeyPath(Key, RegistryKey.OpenBaseKey(RegistryHive.Users, RegistryView.Registry64)));
    ListKeys.AddRange(getKeyPath(Key, RegistryKey.OpenBaseKey(RegistryHive.CurrentConfig, RegistryView.Registry64)));
    return ListKeys;
}

private List<string> getKeyPath(string key, RegistryKey registryKey)
{
    List<string> keys = new List<string>();
    if (CanReadRegistryKey(registryKey))
    {
        foreach (string keyname in registryKey.GetSubKeyNames())
        {
            if (keyname.Contains(key))
                keys.Add(registryKey.Name + "\\" + keyname);

            if (CanReadKey(registryKey, keyname))
                keys.AddRange(getKeyPath(key, registryKey.OpenSubKey(keyname, RegistryKeyPermissionCheck.ReadSubTree)));
        }
    }
    return keys;
}

private bool CanReadRegistryKey(RegistryKey registryKey)
{
    try
    {
        registryKey.GetSubKeyNames();
        return true;
    }
    catch (UnauthorizedAccessException e)
    {
        return false;
    }
}

private bool CanReadKey(RegistryKey registryKey, string keyname)
{
    try
    {
        registryKey.OpenSubKey(keyname, RegistryKeyPermissionCheck.ReadSubTree);
        return true;
    }
    catch (SecurityException e)
    {
        return false;
    }
}

用法:

List<string> ListKeys = SearchKey("MY_KEY");

我并不总是得到相同的结果。有时我找到 7 个 key ，有时是 8 个。(丢失的 key 是 HKEY_CLASSES_ROOT\Wow6432Node\CLSID{MY_KEY})

这是我的删除代码:

public int RemoveKey(string Key)
{
    int count = RemoveKeys(Key, RegistryKey.OpenBaseKey(RegistryHive.ClassesRoot, RegistryView.Registry64));
    count += RemoveKeys(Key, RegistryKey.OpenBaseKey(RegistryHive.CurrentUser, RegistryView.Registry64));
    count += RemoveKeys(Key, RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64));
    count += RemoveKeys(Key, RegistryKey.OpenBaseKey(RegistryHive.Users, RegistryView.Registry64));
    count += RemoveKeys(Key, RegistryKey.OpenBaseKey(RegistryHive.CurrentConfig, RegistryView.Registry64));
    return count;
}

private int RemoveKeys(string key, RegistryKey registryKey)
{
    int count = 0;
    if (CanReadRegistryKey(registryKey))
    {
        foreach (string keyname in registryKey.GetSubKeyNames())
        {
            count += RemoveKeys(key, registryKey.OpenSubKey(keyname));
            try
            {
                if (keyname.Contains(key))
                {
                    registryKey.DeleteValue(keyname);
                    count++;
                }
            }
            catch (Exception e)
            {
            }
        }
    }
    return count;
}

用法:

int NumberOfRemovedKeys = RemoveKey("MY_KEY");

但我总是在这段代码上遇到错误:

registryKey.DeleteValue(keyname);

错误信息:

System.UnauthorizedAccessException: Can not write to the registry key.

当我尝试以管理员模式启动应用程序时，我遇到了同样的错误。但是当我尝试从 regedit 中手动删除 key 时，没有问题。

在“搜索”代码中，我得到了一个包含完整路径的键列表。我尝试使用完整路径直接删除 key ，但这是不可能的，因为必须使用 RegistryHive(例如 RegistryHive.ClassesRoot)初始化 RegistryKey，但 RegistryHive 已在完整路径中准备就绪。

如何获得删除权限？

Answer 1

你有一个完整的例子 Read, write and delete from registry with C#

和MSDN Doc

这是一个好的开始，希望对您有所帮助!