C# simple multithreading

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 :)

:-) If you're using .NET Framework 4, there's also a TaskFactory class in the System.Threading.Tasks namespace that's worth looking into. It's a very similar creature and has small trade-offs either way, but does allow a nice fluent syntax for chaining events together. — Adrian Thompson Phillips
– Adrian Thompson Phillips, Commented May 15, 2012 at 8:54

Botz3000 · Accepted Answer · 2012-05-15 08:18:59Z

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.

Ventsyslav Raikov · Accepted Answer · 2012-05-15 08:12:50Z

4

You need to call Thread.Start to schedule your thread for execution.

answered May 15, 2012 at 8:12

Ventsyslav Raikov

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