问题
I have a FileSystemWatcher listening on a folder. When I try renaming this folder (in Windows Explorer) I get a
The action can't be completed because the folder or a file in it is open in another program
error.
Commenting out the FileSystemWatcher calls fixes this.
I've tried reproducing the error with a simple program, but haven't been successful so I'm not sure what's going on here. Has anyone encountered anything like this with a FileSystemWatcher? If so - what might be causing it?
More information:
The following seems to be enough to cause the error:
FileSystemWatcher fsw = new FileSystemWatcher(path);
fsw.Deleted += new FileSystemEventHandler(fsw_Deleted);
fsw.EnableRaisingEvents = true;
I can rename files in that folder. And sibling files. I even tried putting a return; as the first line in fsw_Deleted. Still didn't work. As didn't closing Visual Studio, and deleting obj and bin, and running again. And I even tried running the exe file not within VS. Still - no lock if it's not running, Locked if it is.
回答1:
I've discovered what caused this. There was a second FileSystemWatcher - on a sub directory of the first - which didn't allow renaming the first.
(I'm still surprised, though. A FileSystemWatcher should be "invisible".)
回答2:
Its going to do that, since your process is looking for files in that folder. What you may want to do is add a handler for fsw.Rename. Then inside that process you should do a RemoveHandler on looking for new files, and then add it back in with the new name of the folder.
来源：https://stackoverflow.com/questions/28224595/filesystemwatcher-locks-folder