deleting a subkey

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aaronfude@gmail.com - 10 Aug 2005 01:01 GMT

Hi,

I have the following code (from a project I found on the web) that
deletes a subkey.

RegistryKey root = Registry.ClassesRoot;
root.DeleteSubKey("AllFilesystemObjects\\shellex\\ContextMenuHandlers\\CleanVS");

It throws the following exception:

Void DeleteSubKey(System.String, Boolean)
System.ArgumentException: Cannot delete a subkey tree because the
subkey does not exist.
at Microsoft.Win32.RegistryKey.DeleteSubKey(String subkey, Boolean
throwOnMis
singSubKey)
at Microsoft.Win32.RegistryKey.DeleteSubKey(String subkey)
at CleanVS.CleanVS.UnregisterServer(String zRegKey)

I checked manually that the subkey does exist, and in fact it gets
deleted during this operation! ...But I still get the error! Any
ideas?!

By the way, the key was created with this command:

root = Registry.ClassesRoot;
rk =
root.CreateSubKey("AllFilesystemObjects\\shellex\\ContextMenuHandlers\\CleanVS");
rk.SetValue("", clsid);
rk.Close();

Very many thanks in advance!

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aaronfude@gmail.com - 10 Aug 2005 20:11 GMT

I'm guessing, this may not be the right news group for this question?
Can someone recommend the right news group?

Thanks!

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Mattias Sjögren - 11 Aug 2005 08:01 GMT

>I'm guessing, this may not be the right news group for this question?
>Can someone recommend the right news group?

The group is fine. But I can't reproduce the problem, the key gets
deleted without any exception being thrown here. Can you put together
a short example that reproduces the problem you're seeing?

Mattias

Signature

Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

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aaronfude@gmail.com - 11 Aug 2005 16:24 GMT

Hi, thanks for the answer.

Your response prompted me to put a couple of printing statements into
my method. I realized that what's happens is that the method is called
twice (which explains it).

Why it is called twice is not a mystery. Here's the excerpt from Main:

Assembly asm = Assembly.GetExecutingAssembly();
RegistrationServices reg = new RegistrationServices();
if (unregister) {
System.Console.Error.WriteLine("About to call
\"UnregisterAssemply\"");
reg.UnregisterAssembly(asm);
System.Console.Error.WriteLine("About to call \"Unregister\"");
CleanVS.UnregisterServer("");
System.Console.Error.WriteLine("Done calling \"Unregister\"");
}

and I learn that CleanVS.UnregisterServer is called automatically from
reg.UnregisterAssembly(asm) and then by me manually? Voila.

But is this defined behavior? Should I just comment out
CleanVS.UnregisterServer("")? Once again, this is not my code, but
something I found at
http://www.informit.com/articles/article.asp?p=169474&redir=1&rl=1

Thanks for responding and thank you very much in advance,

Aaron Fude

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deleting a subkey

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