Find a match in connection values
I am having problems with the following two points:
- How to get all subkey values in ClassesRoot \ Typelib and;
- How to find a match for a known value (pathname / dll) in the subkey values array.
As a reference, I'm trying to find a way to check if a DLL has been registered. Someone said that checking the ClassesRoot \ Typelib for a DLL was one way to do it, since I know the directory location and the DLL name, but nothing else.
Does anyone have any tips? Greetings.
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2 answers
I haven't tested it extensively and it has very little error handling code, but it should get you started.
public static bool IsRegistered(string name, string dllPath)
{
RegistryKey typeLibKey = Registry.ClassesRoot.OpenSubKey("TypeLib");
foreach (string libIdKeyName in typeLibKey.GetSubKeyNames())
{
RegistryKey libIdKey = typeLibKey.OpenSubKey(libIdKeyName);
foreach (string versionKeyName in libIdKey.GetSubKeyNames())
{
RegistryKey versionKey = libIdKey.OpenSubKey(versionKeyName);
string regName = (string)versionKey.GetValue("");
if (regName == name)
{
foreach (string itterKeyName in versionKey.GetSubKeyNames())
{
int throwawayint;
if (int.TryParse(itterKeyName, out throwawayint))
{
RegistryKey itterKey = versionKey.OpenSubKey(itterKeyName);
string regDllPath = (string)itterKey.OpenSubKey("win32").GetValue("");
if (regDllPath == dllPath)
{
return true;
}
}
}
}
}
}
return false;
}
}
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Take a look at Microsoft.Win32.Registry and Microsoft.Win32.RegistryKey.
public void Foo()
{
foreach (string s in Microsoft.Win32.Registry.CurrentUser.GetSubKeyNames())
{
Microsoft.Win32.RegistryKey rk = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(s);
// check here for the dll value and exit if found
// recurse down the tree...
}
}
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