OpenSubKey()对于一个注册表项返回 null，我可以在 regedit. exe 中看到这一点

我正在尝试获取这个键中所有子键的显示名称:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall

用这个密码:

     RegistryKey newKey;
string val;


string KeyPath64Bit = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall";
RegistryKey mainKey = Registry.LocalMachine.OpenSubKey(KeyPath64Bit);


string[] RegKeys64Bits = Registry.LocalMachine.OpenSubKey(KeyPath64Bit).GetSubKeyNames();


foreach (string s in RegKeys64Bits)
{
newKey = mainKey.OpenSubKey(s);
val = newKey.GetValue("DisplayName", -1, RegistryValueOptions.None).ToString();
if (val != "-1")
file64.WriteLine(val);
}

在运行了代码之后，我找不到我需要的一个键:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{DA5E371C-6333-3D8A-93A4-6FD5B20BCC6E}

它应该有一个显示名称: Microsoft Visual C + + 2010 x64 Redistribution-10.0.30319，但是 GetSubKeyNames()方法给了我一个子键: {DA5E371C-6333-3D8A-93A4-6FD5B20BCC6E}.KB2151757，它没有任何显示名称。

为什么我不能得到确切的子密钥我需要({DA5E371C-6333-3D8A-93A4-6FD5B20BCC6E}) ，我怎样才能得到它？

59375

小开

最佳答案

A 32-bit application on a 64-bit OS will be looking at the HKLM\Software\Wow6432Node node by default. To read the 64-bit version of the key, you'll need to specify the RegistryView:

using (var hklm = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64))
using (var key = hklm.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall"))
{
// key now points to the 64-bit key
}

The API to do this was added in .NET 4.0; if you're still using 3.5, you'll need to use P/Invoke to access the 64-bit keys: http://www.rhyous.com/2011/01/24/how-read-the-64-bit-registry-from-a-32-bit-application-or-vice-versa/