读取注册表和 Wow6432Node 密钥
题
我有一些代码可以读取注册表并在其中查找值 HKEY_LOCAL_MACHINE\Software\App\
但在 64 位版本的 Windows 上运行时,该值低于 HKEY_LOCAL_MACHINE\Software\Wow6432Node\App\
.
我应该如何最好地处理这个问题?我是否需要 64 位安装程序,还是应该重写代码来检测这两个位置?
解决方案
如果您标记你C#程序作为86(而不是任何CPU),那么它将会看到HKEY_LOCAL_MACHINE\Software\Wow6432Node\App
作为HKEY_LOCAL_MACHINE\Software\App\
。
如果安装64位.NET所有CPU A .NET程序将运行作为一个64位的过程。的32位注册表是Wow6432Node
为64位程序下。
其他提示
在一个64位机,这里是如何访问注册表的32位图的示例:
using (var view32 = RegistryKey.OpenBaseKey(RegistryHive.CurrentUser,
RegistryView.Registry32))
{
using (var clsid32 = view32.OpenSubKey(@"Software\Classes\CLSID\", false))
{
// actually accessing Wow6432Node
}
}
...相比,...
using (var view64 = RegistryKey.OpenBaseKey(RegistryHive.CurrentUser,
RegistryView.Registry64))
{
using (var clsid64 = view64.OpenSubKey(@"Software\Classes\CLSID\", true))
{
....
}
}
Wally 的答案+1,但他的解决方案适用于.NET 4.0 及更高版本。
我找到了另一个解决方案,它也适用于 .NET 2.0 这里
#region RegHelper
enum RegSAM
{
QueryValue = 0x0001,
SetValue = 0x0002,
CreateSubKey = 0x0004,
EnumerateSubKeys = 0x0008,
Notify = 0x0010,
CreateLink = 0x0020,
WOW64_32Key = 0x0200,
WOW64_64Key = 0x0100,
WOW64_Res = 0x0300,
Read = 0x00020019,
Write = 0x00020006,
Execute = 0x00020019,
AllAccess = 0x000f003f
}
static class RegHive
{
public static UIntPtr HKEY_LOCAL_MACHINE = new UIntPtr(0x80000002u);
public static UIntPtr HKEY_CURRENT_USER = new UIntPtr(0x80000001u);
}
static class RegistryWOW6432
{
[DllImport("Advapi32.dll")]
static extern uint RegOpenKeyEx(UIntPtr hKey, string lpSubKey, uint ulOptions, int samDesired, out int phkResult);
[DllImport("Advapi32.dll")]
static extern uint RegCloseKey(int hKey);
[DllImport("advapi32.dll", EntryPoint = "RegQueryValueEx")]
public static extern int RegQueryValueEx(int hKey, string lpValueName, int lpReserved, ref uint lpType, System.Text.StringBuilder lpData, ref uint lpcbData);
static public string GetRegKey64(UIntPtr inHive, String inKeyName, string inPropertyName)
{
return GetRegKey64(inHive, inKeyName, RegSAM.WOW64_64Key, inPropertyName);
}
static public string GetRegKey32(UIntPtr inHive, String inKeyName, string inPropertyName)
{
return GetRegKey64(inHive, inKeyName, RegSAM.WOW64_32Key, inPropertyName);
}
static public string GetRegKey64(UIntPtr inHive, String inKeyName, RegSAM in32or64key, string inPropertyName)
{
//UIntPtr HKEY_LOCAL_MACHINE = (UIntPtr)0x80000002;
int hkey = 0;
try
{
uint lResult = RegOpenKeyEx(RegHive.HKEY_LOCAL_MACHINE, inKeyName, 0, (int)RegSAM.QueryValue | (int)in32or64key, out hkey);
if (0 != lResult) return null;
uint lpType = 0;
uint lpcbData = 1024;
StringBuilder AgeBuffer = new StringBuilder(1024);
RegQueryValueEx(hkey, inPropertyName, 0, ref lpType, AgeBuffer, ref lpcbData);
string Age = AgeBuffer.ToString();
return Age;
}
finally
{
if (0 != hkey) RegCloseKey(hkey);
}
}
}
#endregion
用法:
string value64 = RegistryWOW6432.GetRegKey64(RegHive.HKEY_LOCAL_MACHINE, @"SOFTWARE\Microsoft\Windows NT\CurrentVersion", "RegisteredOrganization");
string value32 = RegistryWOW6432.GetRegKey32(RegHive.HKEY_LOCAL_MACHINE, @"SOFTWARE\Microsoft\Windows NT\CurrentVersion", "RegisteredOrganization");
下面是一个全功能于一身的解决方案,将覆盖的X32 / x64系统和安装在本地计算机或用户帐户上的捕获应用程序。
public class InstalledProgramInfo
{
public string name;
public string path;
}
public static InstalledProgramInfo FindInstalledApp(string findname, bool dump = false)
{
if (String.IsNullOrEmpty(findname)) return null;
string uninstallKey = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall";
RegistryHive[] keys = new RegistryHive[] { RegistryHive.CurrentUser, RegistryHive.LocalMachine };
RegistryView[] views = new RegistryView[] { RegistryView.Registry32, RegistryView.Registry64 };
foreach (var hive in keys)
{
foreach (var view in views)
{
RegistryKey rk = null,
basekey = null;
try
{
basekey = RegistryKey.OpenBaseKey(hive, view);
rk = basekey.OpenSubKey(uninstallKey);
}
catch (Exception ex) { continue; }
if (basekey == null || rk == null)
continue;
if (rk == null)
{
if (dump) Console.WriteLine("ERROR: failed to open subkey '{0}'", uninstallKey);
return null;
}
if (dump) Console.WriteLine("Reading registry at {0}", rk.ToString());
foreach (string skName in rk.GetSubKeyNames())
{
try
{
RegistryKey sk = rk.OpenSubKey(skName);
if (sk == null) continue;
object skname = sk.GetValue("DisplayName");
object skpath = sk.GetValue("InstallLocation");
if (skpath == null)
{
skpath = sk.GetValue("UninstallString");
if (skpath == null) continue;
FileInfo fi = new FileInfo(skpath.ToString());
skpath = fi.Directory.FullName;
}
if (skname == null || skpath == null) continue;
string thisname = skname.ToString();
string thispath = skpath.ToString();
if (dump) Console.WriteLine("{0}: {1}", thisname, thispath);
if (!thisname.Equals(findname, StringComparison.CurrentCultureIgnoreCase))
continue;
InstalledProgramInfo inf = new InstalledProgramInfo();
inf.name = thisname;
inf.path = thispath;
return inf;
}
catch (Exception ex)
{
// todo
}
}
} // view
} // hive
return null;
}
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