Releasing Open FileHandles in C#

Question

Hi all,

I have a third-party component that copy an image and opens it for a certain task, but it seems that it's no releasing the file handle.

I've read the documentation of that component, but it was released like in 2004 and there's a certain method to release the handle, but of course it needs an (int bmpPtr). so it's obviously a pointer. So the question is: Is there a way to retrieve the open handles on a certain file ... And in case somebody knows, is there a way to know what's the identity of the opening process?

And the problem is in C# not in C++ . I would prefere a solution without DLLImport, but i don't think it's doable. Cheers

Answer 1

Closing the file handle out from underneath the component is probably not the best idea, and I don't know that it can be done from C#. However, you should look for a Dispose method on the component you are using. Typically, Dispose is used to clean up unmanaged resources, such as file handles.

Answer 2

If it has a method that needs bmpPtr, then there was a method that returned a bmpPtr. Find out which one, where you called it, save the bmpPtr then use it later to release.

Answer 3

I'm not sure if this applies, but just for the record: if you load a bitmap with Image.FromFile, the file will be open until the image is disposed.