C# OpenSubKey() 为我可以在 regedit.exe 中看到的注册表项返回 null
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OpenSubKey() returns null for a registry key that I can see in regedit.exe
提问by Zak Soliman
I'm trying to get all the display names of the sub keys within this key:
我正在尝试获取此键中子键的所有显示名称：
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
With this code:
使用此代码：
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);
}
After running the code I can't find one of the keys I need:
运行代码后，我找不到我需要的键之一：
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{DA5E371C-6333-3D8A-93A4-6FD5B20BCC6E}
And it should have the display name: Microsoft Visual C++ 2010 x64 Redistributable - 10.0.30319, but instead the GetSubKeyNames()method gives me the sub key : {DA5E371C-6333-3D8A-93A4-6FD5B20BCC6E}.KB2151757which doesn't have any display name.
它应该有显示名称：Microsoft Visual C++ 2010 x64 Redistributable - 10.0.30319，但该GetSubKeyNames()方法给了我子键：{DA5E371C-6333-3D8A-93A4-6FD5B20BCC6E}.KB2151757它没有任何显示名称。
Why can't I get the exact sub key I need ({DA5E371C-6333-3D8A-93A4-6FD5B20BCC6E}) and how can I get it?
为什么我无法获得所需的确切子密钥 ( {DA5E371C-6333-3D8A-93A4-6FD5B20BCC6E}) 以及如何获得它？
采纳答案by Richard Deeming
A 32-bit application on a 64-bit OS will be looking at the HKLM\Software\Wow6432Nodenode by default. To read the 64-bit version of the key, you'll need to specify the RegistryView:
HKLM\Software\Wow6432Node默认情况下，64 位操作系统上的 32 位应用程序将查看节点。要读取 64 位版本的密钥，您需要指定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/
.NET 4.0 中添加了执行此操作的 API；如果您仍在使用 3.5，则需要使用 P/Invoke 来访问 64 位密钥：http: //www.rhyous.com/2011/01/24/how-read-the-64-bit -registry-from-a-32-bit-application-or-vice-versa/
回答by Clint
In Visual Studio 2017 go to
在 Visual Studio 2017 中转到
Project > Properties > Build > Uncheck 32 bit and Platform target as "Any CPU".
