Update UI control by FileSystemWatcher

Question

Im having some problems in my code:

private void start_watcher()
    {
        fswFiler = new FileSystemWatcher(Control.filer.get_path(),"*.*");

        //fswStorage = new FileSystemWatcher(Control.storage.get_path());

        fswFiler.Changed += new FileSystemEventHandler(updatePend);
        fswFiler.Deleted += new FileSystemEventHandler(updatePend);
        fswFiler.Created += new FileSystemEventHandler(updatePend);
        fswFiler.Renamed += new RenamedEventHandler(updatePend);

        fswFiler.EnableRaisingEvents = true;

    }

    private void updatePend(object sender, FileSystemEventArgs e)
    {
        this.viewPend.Nodes.Clear();
        Control.filer.refresh_files_list();
        this.viewPend.Nodes.Add(Control.filer.get_files_node());
    }

throws me out of the program. any idea why is that happening ?

Control.filer.get_path() - returns a string of the directory path — nadav, Dec 28 '12 at 08:03
@nadav you can find the line where it throws you out of the program by putting a breakpoint on the first line in updatePend and then go step by step in the code. Or you can enable Exceptions in Debug => Exceptions... => Mark the checkbox next to Common Language Runtime Exceptions. — TimVK, Dec 28 '12 at 08:07

score 0 · Accepted Answer · edited May 23 '17 at 10:26

0

The FileSystemWatcher notifications occur in another thread than the UI uses. You must Invoke See: how to update a windows form GUI from another class?

Or even better: How to update the GUI from another thread in C#?

edited May 23 '17 at 10:26

Community

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answered Dec 28 '12 at 07:57

Mario The Spoon

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Update UI control by FileSystemWatcher

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