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POCancelling background-worker
 

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  1. POCancelling background-worker
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    <p>I have the following problem and I hope someone will be able to help me with it.</p> <p>I have a worker in VB .net (2010) which runs a shell-program.</p> <p>The shell program is a service and output stuff like:</p> <pre><code>Server initializing... Server opening port... more info... </code></pre> <p>I am able to 'catch' the output of the shell and add it to a textbox (using set text function).</p> <p>And I am able to Cancel the worker by clicking on a stopbutton, however when there is no more output by the shell I cannot stop the worker anymore.</p> <p>At least i suspect that's the case.</p> <p>I've tried checking for endofstream (commented section) but that doesn't work.</p> <p>I've also tried to same code with some test text in stead of 'clsProcess.StandardOutput.ReadLine' and that also works.</p> <p>So I came to the conclusion it must have something to do with clsProcess.StandardOutput.ReadLine being at the end???</p> <pre><code> Try clsProcess.StartInfo.UseShellExecute = False clsProcess.StartInfo.RedirectStandardOutput = True clsProcess.StartInfo.RedirectStandardError = True clsProcess.StartInfo.FileName = serverpath + config_executable clsProcess.StartInfo.CreateNoWindow = True clsProcess.Start() Catch ex As Exception MsgBox(ex.Message, MsgBoxStyle.Critical, "Error starting server") Debug.Print(ex.Message) End Try Do While Not workerServer.CancellationPending Try 'If Not clsProcess.StandardOutput.EndOfStream Then SetText(clsProcess.StandardOutput.ReadLine + vbNewLine) 'End If Catch ex As Exception MsgBox(ex.Message, MsgBoxStyle.Critical, "Error adding line to log") End Try Threading.Thread.Sleep(100) Loop clsProcess.Kill() </code></pre> <p>Any ideas?</p> <p>Thanks in advance!</p> <p>Regards,</p> <p>PH</p>
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    1. USJoel Coehoorn
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    1. COCan you post the code in your stop button's click event? And any relevant functions that code may call?
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