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POC# Threading and Forms: NotSupportedException - Use Control.Invoke?
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  1. POC# Threading and Forms: NotSupportedException - Use Control.Invoke?
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    copied!<p>I am trying to run an application with at least two threads: One form for the user interface and one or more worker threads. They are jointly reading/writing from a static class through a number of other classes. </p> <p>This is why I am passing an instance of the worker class to the display form. I guess that is why it goes wrong for me: </p> <pre><code> public class CoCoon { private Screen displayForm; private Worker worker; public ThreadedApp() { worker = new Worker (1024); displayForm = new Screen(worker); } public void Run() { //thread 1: display form Thread screenThread = new Thread(() =&gt; Application.Run(displayForm)); //thread 2: background worker Thread workerThread = new Thread(worker.Run) {IsBackground = true}; screenThread.Start(); Thread.Sleep(1000); //if I don't wait a while, I get an ObjectDisposedException! workerThread.Start(); } </code></pre> <p>The threads and objects are initiated just fine, but as soon after the Form_Load method is has been handled, an error is thrown on the Application.Run(displayForm) line above. It is an NotSupportedException, with a remark that I should use Control.Invoke. But I am not sure I understand, because I am not letting threads other than the display form's use the controls on it. </p> <p>I am new to threading. Can anyone help me on my way? Thanks!</p> <p>PS: One detail - I am developing this for the Windows Mobile platform. </p> <p><strong>EDIT</strong> After popular request hereby the Stack Trace</p> <pre><code> at Microsoft.AGL.Common.MISC.HandleAr(PAL_ERROR ar)\r\n at System.Windows.Forms.Control.get_Visible()\r\n at System.Windows.Forms.Form._SetVisibleNotify(Boolean fVis)\r\n at System.Windows.Forms.Control.set_Visible(Boolean value)\r\n at System.Windows.Forms.Application.Run(Form fm)\r\n at CoCoonWM6.CoCoon.&lt;Run&gt;b__1()\r\n </code></pre>
 

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