Mutlithreading with GUI

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Hi,

I am not familiar with threading.
I have tried googling but none of the suggestions I found work correctly.
I have an application that calculates the the shortest routes given points on the form.
The shortest route is draw after each iteration by connecting the points from start to finish.

this.workerThread = new Thread(new ThreadStart(this.DrawRoute));<br />
              this.workerThread.Start();<br />
              while (workerThread.IsAlive)<br />
              {<br />
<br />
                  Application.DoEvents();<br />
<br />
              }

This is the code I have which works, but by calling the Application.DoEvents(), I am unable to update the form while it is running. ie. update a label with the new shortest route.
Is there another way of doing it? I have tried using delegates but that did not seem to work, and if I just use workerThread.Start(); it does not work either.

Thanks for any help.

Chris

Posted 13-Oct-10 22:40pm

Chriso82

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Nathan St · Accepted Answer · 2010-10-13T22:44:00

Solution 1

You need to use the Invoke method to marshal calls from your worker thread back to your form.

Posted 13-Oct-10 22:44pm

Nathan St

Comments

Chriso82 14-Oct-10 5:12am

Could you possibly giev me an example?

Chriso82 14-Oct-10 5:13am

Do I have to use a delegate within the thread?

Nathan St 14-Oct-10 5:24am

There's an example in that link. lblResult.Invoke(new MethodInvoker(delegate { lblResult.Text = result; }));

Chriso82 14-Oct-10 6:41am

Thanks alot Nat

Nathan St 14-Oct-10 7:25am

My pleasure :)