Question

I’m quite new to multithreading and today I ran into this strange problem. I followed some online tutorials and it seemed to me that what I’m doing is the correct.

So I got this code:

GrammarThreading gThread = new GrammarThreading(this, grammar);
Thread thread = new Thread(new ThreadStart(gThread.threadUnloadGrammar));

with it I want to move grammar unloading to another thread, since it takes a couple of seconds. This is how the class of GrammarThreading looks like:

public class GrammarThreading
{
    public MainWindow window { get; set; }
    public Grammar grammar { get; set; }

    public GrammarThreading(MainWindow _window, Grammar _grammar)
    {
        window = _window;
        grammar = _grammar;
    }

    public void threadUnloadGrammar()
    {
        window._recognizer.UnloadGrammar(grammar);
    }
}

However, I debugged the code and threadUnloadGrammar() method seems never to be called. I’ve got no idea what could the problem be so any help will be greatly appreciated. Thanks 🙂

Answer 1

You need to call thread.Start() to start the thread.

On another note, it seems threadUnloadGrammar() uses a variable of type MainWindow. Not sure what MainWindow._recognizer.UnloadGrammar does exactly, but make sure it doesn’t access any UI elements in there, unless it uses Control.Invoke for that.