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POC# BackgroundWorker - how should i get rid of DoEvents
 

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  1. POC# BackgroundWorker - how should i get rid of DoEvents
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    <p>I'm trying to figure out the best way to handle a backgroundworker that is triggered off radio button clicks. I created a very simple form with 3 radio buttons and a label. Each of the radio buttons share the same event radioButton_CheckedChanged. If the event completes then I update the label to "Complete". If you click another radio button before the event completes then update label to Cancelled. Below is the code i have written in this quick example. Although the application tends to run as expected my concern is the use of Application.DoEvents. What are my alternatives to this. For obvious reasons i can't sleep while IsBusy. Am I going about this all wrong or is there a better way to do this? Thanks, poco</p> <pre><code>private void radioButton_CheckedChanged(object sender, EventArgs e) { RadioButton rb = sender as RadioButton; if (rb.Checked) { if (backgroundWorker1.IsBusy) { backgroundWorker1.CancelAsync(); while (backgroundWorker1.IsBusy) Application.DoEvents(); } backgroundWorker1.RunWorkerAsync(); } } private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) { BackgroundWorker worker = sender as BackgroundWorker; for (int i = 0; i &lt; 100 &amp;&amp; !worker.CancellationPending; ++i) Thread.Sleep(1); if (worker.CancellationPending) { e.Cancel = true; return; } } private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) { if (e.Cancelled) label1.Text = "Canceled"; else label1.Text = "Complete"; } </code></pre>
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