Databases
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    <p>As Kamil has pointed out, <code>Tasks</code> is not available in older than .NET 4.0.</p> <p>If you are stuck in the dark ages, the BackgroundWorker does a great job of this. In fact, this is probably what it was created for!</p> <p><strong>Untested Pseudo Code:</strong></p> <pre><code>public partial class Form1 : Form { private bool ok; private BackgroundWorker worker; public Form1() { InitializeComponent(); worker = new BackgroundWorker(); worker.WorkerReportsProgress = true; worker.WorkerSupportsCancellation = true; worker.DoWork += new DoWorkEventHandler(worker_DoWork); worker.ProgressChanged += new ProgressChangedEventHandler(worker_ProgressChanged); worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted); ok = true; } private void timerTick(object sender, EventArgs e) { if (!worker.IsBusy) { worker.RunWorkerAsync(); } } private void worker_DoWork(object sender, DoWorkEventArgs e) { var w = (BackgroundWorker)sender; MyData inputData = (MyData)e.Argument; for (int i = 0; (i &lt; NUM_TASKS) &amp;&amp; !worker.CancellationPending; i++) { w.ReportProgress(i); // do tasks } e.Result = SomethingYouWantReturned(); } private void worker_ProgressChanged(object sender, ProgressChangedEventArgs e) { if (!ok) { worker.CancelAsync(); } } private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) { if (e.Error != null) { ok = false; MessageBox.Show(this, e.Error.Message, "Error!"); } else { var item = (TypeYouWantedReturned)e.Result; Console.WriteLine("Do something with `item`."); } } } </code></pre>
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    1. COi have net framework 3.5, this example works for me!, but dont i need to use thread.sleep in the DoWork event? something like: Thread.Sleep(1000); Method(parameters);
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      1. USAlberto Valero Ortega
    2. COSkip the `Thread.Sleep(1000);` ...instead, set your timer to tick every 1000 ms. This is usually configured in the designer, so I didn't bother showing how to manually write the code for it.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

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